gdal

package module
v0.0.0-...-100dbac Latest Latest
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 Go to latest Published: Apr 27, 2020 License: MIT Imports: 6 Imported by: 0

README 

-------------
About
-------------

The gdal.go package provides a go wrapper for GDAL, the Geospatial Data Abstraction Library. More information about GDAL can be found at http://www.gdal.org

-------------
Installation
-------------

1) go get github.com/lukeroth/gdal
2) Set the GDAL library and include directories to the appropriate locations.
3) go build

-------------
Compatibility
-------------

This software has been tested most recently on Ubuntu 18.10, GDAL version 2.3.2.

-------------
Examples
-------------

-------------
Status (3/08/2019)
-------------

The majority of GDAL functionality exposed by the C API is available, as well as much of the OGR API.
Most functionality is not covered by tests or benchmarks.

Documentation

Overview

Package gdal provides a wrapper for GDAL, the Geospatial Data Abstraction Library. This C/C++ library provides access to a large number of geospatial raster data formats. It also contains a wrapper for the related OGR Simple Feature Library which provides similar functionality for vector formats.

Limitations

Some less oftenly used functions are not yet implemented. The majoriry of these involve style tables, asynchronous I/O, and GCPs.

The documentation is fairly limited, but the functionality fairly closely matches that of the C++ api.

This wrapper has most recently been tested on Windows7, using the MinGW32_x64 compiler and GDAL version 1.11.

Usage

A simple program to create a georeferenced blank 256x256 GeoTIFF: 

package main

import (
	"fmt"
	"flag"
	gdal "github.com/lukeroth/gdal_go"
)

func main() {
	flag.Parse()
	filename := flag.Arg(0)
	if filename == "" {
		fmt.Printf("Usage: test_tiff [filename]\n")
		return
	}
	buffer := make([]uint8, 256 * 256)

	driver, err := gdal.GetDriverByName("GTiff")
	if err != nil {
		fmt.Println(err.Error())
		return
	}

	dataset := driver.Create(filename, 256, 256, 1, gdal.Byte, nil)
	defer dataset.Close()

	spatialRef := gdal.CreateSpatialReference("")
	spatialRef.FromEPSG(3857)
	srString, err := spatialRef.ToWKT()
	dataset.SetProjection(srString)
	dataset.SetGeoTransform([]float64{444720, 30, 0, 3751320, 0, -30})
	raster := dataset.RasterBand(1)
	raster.IO(gdal.Write, 0, 0, 256, 256, buffer, 256, 256, 0, 0)
}

More examples can be found in the ./examples subdirectory.

Index

Constants

View Source 
const (
	VERSION_MAJOR = int(C.GDAL_VERSION_MAJOR)
	VERSION_MINOR = int(C.GDAL_VERSION_MINOR)
	VERSION_REV   = int(C.GDAL_VERSION_REV)
	VERSION_BUILD = int(C.GDAL_VERSION_BUILD)
	VERSION_NUM   = int(C.GDAL_VERSION_NUM)
	RELEASE_DATE  = int(C.GDAL_RELEASE_DATE)
	RELEASE_NAME  = string(C.GDAL_RELEASE_NAME)
)
View Source 
const (
	/** Flag returned by GDALGetMaskFlags() to indicate that all pixels are valid */
	GMF_ALL_VALID = 0x01
	/** Flag returned by GDALGetMaskFlags() to indicate that the mask band is
	 * valid for all bands */
	GMF_PER_DATASET = 0x02
	/** Flag returned by GDALGetMaskFlags() to indicate that the mask band is
	 * an alpha band */
	GMF_ALPHA = 0x04
	/** Flag returned by GDALGetMaskFlags() to indicate that the mask band is
	 * computed from nodata values */
	GMF_NODATA = 0x08

	/** Flag returned by GDALGetDataCoverageStatus() when the driver does not
	 * implement GetDataCoverageStatus(). This flag should be returned together
	 * with GDAL_DATA_COVERAGE_STATUS_DATA */
	GDAL_DATA_COVERAGE_STATUS_UNIMPLEMENTED = 0x01

	/** Flag returned by GDALGetDataCoverageStatus() when there is (potentially)
	 * data in the queried window. Can be combined with the binary or operator
	 * with GDAL_DATA_COVERAGE_STATUS_UNIMPLEMENTED or
	 * GDAL_DATA_COVERAGE_STATUS_EMPTY */
	GDAL_DATA_COVERAGE_STATUS_DATA = 0x02

	/** Flag returned by GDALGetDataCoverageStatus() when there is nodata in the
	 * queried window. This is typically identified by the concept of missing block
	 * in formats that supports it.
	 * Can be combined with the binary or operator with
	 * GDAL_DATA_COVERAGE_STATUS_DATA */
	GDAL_DATA_COVERAGE_STATUS_EMPTY = 0x04
)
View Source 
const (
	Unknown  = DataType(C.GDT_Unknown)
	Byte     = DataType(C.GDT_Byte)
	UInt16   = DataType(C.GDT_UInt16)
	Int16    = DataType(C.GDT_Int16)
	UInt32   = DataType(C.GDT_UInt32)
	Int32    = DataType(C.GDT_Int32)
	Float32  = DataType(C.GDT_Float32)
	Float64  = DataType(C.GDT_Float64)
	CInt16   = DataType(C.GDT_CInt16)
	CInt32   = DataType(C.GDT_CInt32)
	CFloat32 = DataType(C.GDT_CFloat32)
	CFloat64 = DataType(C.GDT_CFloat64)
)
View Source 
const (
	AR_Pending  = AsyncStatusType(C.GARIO_PENDING)
	AR_Update   = AsyncStatusType(C.GARIO_UPDATE)
	AR_Error    = AsyncStatusType(C.GARIO_ERROR)
	AR_Complete = AsyncStatusType(C.GARIO_COMPLETE)
)
View Source 
const (
	// Read only (no update) access
	ReadOnly = Access(C.GA_ReadOnly)
	// Read/write access.
	Update = Access(C.GA_Update)
)
View Source 
const (
	// Read data
	Read = RWFlag(C.GF_Read)
	// Write data
	Write = RWFlag(C.GF_Write)
)
View Source 
const (
	OFReadOnly      = OpenFlag(C.GDAL_OF_READONLY)
	OFUpdate        = OpenFlag(C.GDAL_OF_UPDATE)
	OFShared        = OpenFlag(C.GDAL_OF_SHARED)
	OFVector        = OpenFlag(C.GDAL_OF_VECTOR)
	OFRaster        = OpenFlag(C.GDAL_OF_RASTER)
	OFVerbose_Error = OpenFlag(C.GDAL_OF_VERBOSE_ERROR)
)
View Source 
const (
	CI_Undefined      = ColorInterp(C.GCI_Undefined)
	CI_GrayIndex      = ColorInterp(C.GCI_GrayIndex)
	CI_PaletteIndex   = ColorInterp(C.GCI_PaletteIndex)
	CI_RedBand        = ColorInterp(C.GCI_RedBand)
	CI_GreenBand      = ColorInterp(C.GCI_GreenBand)
	CI_BlueBand       = ColorInterp(C.GCI_BlueBand)
	CI_AlphaBand      = ColorInterp(C.GCI_AlphaBand)
	CI_HueBand        = ColorInterp(C.GCI_HueBand)
	CI_SaturationBand = ColorInterp(C.GCI_SaturationBand)
	CI_LightnessBand  = ColorInterp(C.GCI_LightnessBand)
	CI_CyanBand       = ColorInterp(C.GCI_CyanBand)
	CI_MagentaBand    = ColorInterp(C.GCI_MagentaBand)
	CI_YellowBand     = ColorInterp(C.GCI_YellowBand)
	CI_BlackBand      = ColorInterp(C.GCI_BlackBand)
	CI_YCbCr_YBand    = ColorInterp(C.GCI_YCbCr_YBand)
	CI_YCbCr_CbBand   = ColorInterp(C.GCI_YCbCr_CbBand)
	CI_YCbCr_CrBand   = ColorInterp(C.GCI_YCbCr_CrBand)
	CI_Max            = ColorInterp(C.GCI_Max)
)
View Source 
const (
	// Grayscale (in GDALColorEntry.c1)
	PI_Gray = PaletteInterp(C.GPI_Gray)
	// Red, Green, Blue and Alpha in (in c1, c2, c3 and c4)
	PI_RGB = PaletteInterp(C.GPI_RGB)
	// Cyan, Magenta, Yellow and Black (in c1, c2, c3 and c4)
	PI_CMYK = PaletteInterp(C.GPI_CMYK)
	// Hue, Lightness and Saturation (in c1, c2, and c3)
	PI_HLS = PaletteInterp(C.GPI_HLS)
)
View Source 
const (
	MD_AREA_OR_POINT = string(C.GDALMD_AREA_OR_POINT)
	MD_AOP_AREA      = string(C.GDALMD_AOP_AREA)
	MD_AOP_POINT     = string(C.GDALMD_AOP_POINT)
)

"well known" metadata items.

View Source 
const (
	DMD_LONGNAME           = string(C.GDAL_DMD_LONGNAME)
	DMD_HELPTOPIC          = string(C.GDAL_DMD_HELPTOPIC)
	DMD_MIMETYPE           = string(C.GDAL_DMD_MIMETYPE)
	DMD_EXTENSION          = string(C.GDAL_DMD_EXTENSION)
	DMD_CREATIONOPTIONLIST = string(C.GDAL_DMD_CREATIONOPTIONLIST)
	DMD_CREATIONDATATYPES  = string(C.GDAL_DMD_CREATIONDATATYPES)

	DCAP_CREATE     = string(C.GDAL_DCAP_CREATE)
	DCAP_CREATECOPY = string(C.GDAL_DCAP_CREATECOPY)
	DCAP_VIRTUALIO  = string(C.GDAL_DCAP_VIRTUALIO)
)
View Source 
const (
	GRA_NearestNeighbour = ResampleAlg(0)
	GRA_Bilinear         = ResampleAlg(1)
	GRA_Cubic            = ResampleAlg(2)
	GRA_CubicSpline      = ResampleAlg(3)
	GRA_Lanczos          = ResampleAlg(4)
	GRA_Average          = ResampleAlg(5)
	GRA_Mode             = ResampleAlg(6)

	GRA_Max = ResampleAlg(8)
	GRA_Min = ResampleAlg(9)
	GRA_Med = ResampleAlg(10)
	GRA_Q1  = ResampleAlg(11)
	GRA_Q3  = ResampleAlg(12)
)
View Source 
const (
	GFT_Integer = RATFieldType(C.GFT_Integer)
	GFT_Real    = RATFieldType(C.GFT_Real)
	GFT_String  = RATFieldType(C.GFT_String)
)
View Source 
const (
	GFU_Generic    = RATFieldUsage(C.GFU_Generic)
	GFU_PixelCount = RATFieldUsage(C.GFU_PixelCount)
	GFU_Name       = RATFieldUsage(C.GFU_Name)
	GFU_Min        = RATFieldUsage(C.GFU_Min)
	GFU_Max        = RATFieldUsage(C.GFU_Max)
	GFU_MinMax     = RATFieldUsage(C.GFU_MinMax)
	GFU_Red        = RATFieldUsage(C.GFU_Red)
	GFU_Green      = RATFieldUsage(C.GFU_Green)
	GFU_Blue       = RATFieldUsage(C.GFU_Blue)
	GFU_Alpha      = RATFieldUsage(C.GFU_Alpha)
	GFU_RedMin     = RATFieldUsage(C.GFU_RedMin)
	GFU_GreenMin   = RATFieldUsage(C.GFU_GreenMin)
	GFU_BlueMin    = RATFieldUsage(C.GFU_BlueMin)
	GFU_AlphaMin   = RATFieldUsage(C.GFU_AlphaMin)
	GFU_RedMax     = RATFieldUsage(C.GFU_RedMax)
	GFU_GreenMax   = RATFieldUsage(C.GFU_GreenMax)
	GFU_BlueMax    = RATFieldUsage(C.GFU_BlueMax)
	GFU_AlphaMax   = RATFieldUsage(C.GFU_AlphaMax)
	GFU_MaxCount   = RATFieldUsage(C.GFU_MaxCount)
)
View Source 
const (
	GT_Unknown               = GeometryType(C.wkbUnknown)
	GT_Point                 = GeometryType(C.wkbPoint)
	GT_LineString            = GeometryType(C.wkbLineString)
	GT_Polygon               = GeometryType(C.wkbPolygon)
	GT_MultiPoint            = GeometryType(C.wkbMultiPoint)
	GT_MultiLineString       = GeometryType(C.wkbMultiLineString)
	GT_MultiPolygon          = GeometryType(C.wkbMultiPolygon)
	GT_GeometryCollection    = GeometryType(C.wkbGeometryCollection)
	GT_None                  = GeometryType(C.wkbNone)
	GT_LinearRing            = GeometryType(C.wkbLinearRing)
	GT_Point25D              = GeometryType(C.wkbPoint25D)
	GT_LineString25D         = GeometryType(C.wkbLineString25D)
	GT_Polygon25D            = GeometryType(C.wkbPolygon25D)
	GT_MultiPoint25D         = GeometryType(C.wkbMultiPoint25D)
	GT_MultiLineString25D    = GeometryType(C.wkbMultiLineString25D)
	GT_MultiPolygon25D       = GeometryType(C.wkbMultiPolygon25D)
	GT_GeometryCollection25D = GeometryType(C.wkbGeometryCollection25D)
)
View Source 
const (
	FT_Integer       = FieldType(C.OFTInteger)
	FT_IntegerList   = FieldType(C.OFTIntegerList)
	FT_Real          = FieldType(C.OFTReal)
	FT_RealList      = FieldType(C.OFTRealList)
	FT_String        = FieldType(C.OFTString)
	FT_StringList    = FieldType(C.OFTStringList)
	FT_Binary        = FieldType(C.OFTBinary)
	FT_Date          = FieldType(C.OFTDate)
	FT_Time          = FieldType(C.OFTTime)
	FT_DateTime      = FieldType(C.OFTDateTime)
	FT_Integer64     = FieldType(C.OFTInteger64)
	FT_Integer64List = FieldType(C.OFTInteger64List)
)
View Source 
const (
	J_Undefined = Justification(C.OJUndefined)
	J_Left      = Justification(C.OJLeft)
	J_Right     = Justification(C.OJRight)
)

Variables

View Source 
var (
	ErrDebug   = errors.New("Debug Error")
	ErrWarning = errors.New("Warning Error")
	ErrFailure = errors.New("Failure Error")
	ErrFatal   = errors.New("Fatal Error")
	ErrIllegal = errors.New("Illegal Error")
)

Functions

func BoolToCInt 

func BoolToCInt(in bool) (out C.int)

Convert a go bool to a C int

func CIntSliceToInt 

func CIntSliceToInt(data []C.int) []int

Safe array conversion

func CUIntBigSliceToInt 

func CUIntBigSliceToInt(data []C.GUIntBig) []int

func CleanupOGR 

func CleanupOGR()

Clean up all OGR related resources

func CleanupSR 

func CleanupSR()

Cleanup cached SRS related memory

func ComputeMedianCutPCT 

func ComputeMedianCutPCT(
	red, green, blue RasterBand,
	colors int,
	ct ColorTable,
	progress ProgressFunc,
	data interface{},
) int

Compute optimal PCT for RGB image

func CreateScaledProgress 

func CreateScaledProgress(min, max float64, progress ProgressFunc, data unsafe.Pointer) unsafe.Pointer

func DestroyDriverManager 

func DestroyDriverManager()

Destroy the driver manager

func DestroyScaledProgress 

func DestroyScaledProgress(data unsafe.Pointer)

func DitherRGB2PCT 

func DitherRGB2PCT(
	red, green, blue, target RasterBand,
	ct ColorTable,
	progress ProgressFunc,
	data interface{},
) int

24bit to 8bit conversion with dithering

func DummyProgress 

func DummyProgress(complete float64, message string, data interface{}) int

func FlushCacheBlock 

func FlushCacheBlock() bool

Try to flush one cached raster block

func GetCacheMax 

func GetCacheMax() int

Get maximum cache memory

func GetCacheUsed 

func GetCacheUsed() int

Get cache memory used

func GetDriverCount 

func GetDriverCount() int

Fetch the number of registered drivers.

func IntSliceToCInt 

func IntSliceToCInt(data []int) []C.int

Safe array conversion

func InvGeoTransform 

func InvGeoTransform(transform [6]float64) [6]float64

Invert the supplied transform

func OGRDriverCount 

func OGRDriverCount() int

Fetch the number of registered drivers

func OpenDataSourceCount 

func OpenDataSourceCount() int

Return the number of opened data sources

func ParameterInfo 

func ParameterInfo(
	projectionMethod, parameterName string,
) (
	username, paramType string,
	defaultValue float64,
	ok bool,
)

Fetch information about a single parameter of a projection method

func ParameterList 

func ParameterList(method string) (params []string, name string)

Fetch the parameters for a given projection method

func ProjectionMethods 

func ProjectionMethods() []string

Fetch list of possible projection methods

func RegenerateOverview 

func RegenerateOverview(
	sourceRaster RasterBand,
	destRaster RasterBand,
	resampling string,
	progress ProgressFunc, data interface{},
) error

Generate downsampled overviews, for a unique overview band

func RegenerateOverviews 

func RegenerateOverviews(
	sourceRaster RasterBand,
	nOverviewCount int, destRaster []RasterBand,
	resampling string,
	progress ProgressFunc, data interface{},
) error

Generate downsampled overviews

func ReprojectImage 

func ReprojectImage(SrcDS Dataset, SrcWKT string,
	DstDS Dataset, DstWKT string,
	resampleAlg ResampleAlg, dfWarpMemoryLimit float64,
	dfMaxError float64,
	progress ProgressFunc, data interface{},
) error

delete option arg, because GDALWarpOptions have not fil func, like GDALWarpAppOptionsNew(char** papszArgv... just GDALCreateWarpOptions()

func ScaledProgress 

func ScaledProgress(complete float64, message string, data interface{}) int

func SetCacheMax 

func SetCacheMax(bytes int)

Set maximum cache memory

func TermProgress 

func TermProgress(complete float64, message string, data interface{}) int

func VSIFCloseL 

func VSIFCloseL(file VSILFILE)

Close file.

func VSIFReadL 

func VSIFReadL(nSize, nCount int, file VSILFILE) []byte

Read bytes from file.

func VSIReadDirRecursive 

func VSIReadDirRecursive(filename string) []string

List VSI files

Types

type Access 

type Access int

Flag indicating read/write, or read-only access to data.

type AsyncReader 

type AsyncReader struct {
	// contains filtered or unexported fields
}

type AsyncStatusType 

type AsyncStatusType int

status of the asynchronous stream

func GetAsyncStatusTypeByName 

func GetAsyncStatusTypeByName(statusTypeName string) AsyncStatusType

func (AsyncStatusType) Name 

func (statusType AsyncStatusType) Name() string

type ColorEntry 

type ColorEntry struct {
	// contains filtered or unexported fields
}

func (*ColorEntry) Get 

func (ce *ColorEntry) Get() (c1, c2, c3, c4 uint8)

func (*ColorEntry) Set 

func (ce *ColorEntry) Set(c1, c2, c3, c4 uint)

type ColorInterp 

type ColorInterp int

Types of color interpretation for raster bands.

func GetColorInterpretationByName 

func GetColorInterpretationByName(name string) ColorInterp

func (ColorInterp) Name 

func (colorInterp ColorInterp) Name() string

type ColorTable 

type ColorTable struct {
	// contains filtered or unexported fields
}

func CreateColorTable 

func CreateColorTable(interp PaletteInterp) ColorTable

Construct a new color table

func (ColorTable) Clone 

func (ct ColorTable) Clone() ColorTable

Make a copy of the color table

func (ColorTable) CreateColorRamp 

func (ct ColorTable) CreateColorRamp(start, end int, startColor, endColor ColorEntry)

Create color ramp

func (ColorTable) Destroy 

func (ct ColorTable) Destroy()

Destroy the color table

func (ColorTable) Entry 

func (ct ColorTable) Entry(index int) ColorEntry

Fetch a color entry from table

func (ColorTable) EntryCount 

func (ct ColorTable) EntryCount() int

Get number of color entries in table

func (ColorTable) PaletteInterpretation 

func (ct ColorTable) PaletteInterpretation() PaletteInterp

Fetch palette interpretation

func (ColorTable) SetEntry 

func (ct ColorTable) SetEntry(index int, entry ColorEntry)

Set entry in color table

type CoordinateTransform 

type CoordinateTransform struct {
	// contains filtered or unexported fields
}

func CreateCoordinateTransform 

func CreateCoordinateTransform(
	source SpatialReference,
	dest SpatialReference,
) CoordinateTransform

Create a new CoordinateTransform

func (CoordinateTransform) Destroy 

func (ct CoordinateTransform) Destroy()

Destroy CoordinateTransform

func (CoordinateTransform) Transform 

func (ct CoordinateTransform) Transform(numPoints int, xPoints []float64, yPoints []float64, zPoints []float64) bool

type DataSource 

type DataSource struct {
	// contains filtered or unexported fields
}

func OpenDataSource 

func OpenDataSource(name string, update int) DataSource

Open a file / data source with one of the registered drivers

func OpenDataSourceByIndex 

func OpenDataSourceByIndex(index int) DataSource

Return the i'th datasource opened

func OpenSharedDataSource 

func OpenSharedDataSource(name string, update int) DataSource

Open a shared file / data source with one of the registered drivers

func (DataSource) CopyLayer 

func (ds DataSource) CopyLayer(
	source Layer,
	name string,
	options []string,
) Layer

Duplicate an existing layer

func (DataSource) CreateLayer 

func (ds DataSource) CreateLayer(
	name string,
	sr SpatialReference,
	geomType GeometryType,
	options []string,
) Layer

Create a new layer on the data source

func (DataSource) Delete 

func (ds DataSource) Delete(index int) error

Delete the layer from the data source

func (DataSource) Destroy 

func (ds DataSource) Destroy()

Closes datasource and releases resources

func (DataSource) Driver 

func (ds DataSource) Driver() OGRDriver

Fetch the driver that the data source was opened with

func (DataSource) ExecuteSQL 

func (ds DataSource) ExecuteSQL(sql string, filter Geometry, dialect string) Layer

Execute an SQL statement against the data source

func (DataSource) LayerByIndex 

func (ds DataSource) LayerByIndex(index int) Layer

Fetch a layer of this data source by index

func (DataSource) LayerByName 

func (ds DataSource) LayerByName(name string) Layer

Fetch a layer of this data source by name

func (DataSource) LayerCount 

func (ds DataSource) LayerCount() int

Fetch the number of layers in this data source

func (DataSource) Name 

func (ds DataSource) Name() string

Fetch the name of the data source

func (DataSource) Release 

func (ds DataSource) Release() error

Drop a reference to this datasource and destroy if reference is zero

func (DataSource) ReleaseResultSet 

func (ds DataSource) ReleaseResultSet(layer Layer)

Release the results of ExecuteSQL

func (DataSource) Sync 

func (ds DataSource) Sync() error

Flush pending changes to the data source

func (DataSource) TestCapability 

func (ds DataSource) TestCapability(capability string) bool

Test if the data source has the indicated capability

type DataType 

type DataType int

Pixel data types

func (DataType) IsComplex 

func (dataType DataType) IsComplex() int

func (DataType) Name 

func (dataType DataType) Name() string

func (DataType) Size 

func (dataType DataType) Size() int

Get data type size in bits.

func (DataType) Union 

func (dataType DataType) Union(dataTypeB DataType) DataType

type Dataset 

type Dataset struct {
	// contains filtered or unexported fields
}

func GDALTranslate 

func GDALTranslate(
	destName string,
	srcDS Dataset,
	options []string,
) Dataset

func GDALWarp 

func GDALWarp(
	destName string,
	dstDs Dataset,
	srcDs []Dataset,
	options []string,
) Dataset

func Open 

func Open(filename string, access Access) (Dataset, error)

Open an existing dataset

func OpenEx 

func OpenEx(filename string, flags OpenFlag, allowedDrivers []string,
	openOptions []string, siblingFiles []string) (Dataset, error)

Open an existing dataset

func OpenShared 

func OpenShared(filename string, access Access) Dataset

Open a shared existing dataset

func Rasterize 

func Rasterize(dstDS string, sourceDS Dataset, options []string) (Dataset, error)

func Translate 

func Translate(dstDS string, sourceDS Dataset, options []string) (Dataset, error)

func VectorTranslate 

func VectorTranslate(dstDS string, sourceDS []Dataset, options []string) (Dataset, error)

func Warp 

func Warp(dstDS string, sourceDS []Dataset, options []string) (Dataset, error)

func (Dataset) Access 

func (dataset Dataset) Access() Access

Return access flag

func (Dataset) AddBand 

func (dataset Dataset) AddBand(dataType DataType, options []string) error

Add a band to a dataset

func (Dataset) AdviseRead 

func (dataset Dataset) AdviseRead(
	rwFlag RWFlag,
	xOff, yOff, xSize, ySize, bufXSize, bufYSize int,
	dataType DataType,
	bandCount int,
	bandMap []int,
	options []string,
) error

Advise driver of upcoming read requests

func (Dataset) AutoCreateWarpedVRT 

func (dataset Dataset) AutoCreateWarpedVRT(srcWKT, dstWKT string, resampleAlg ResampleAlg) (Dataset, error)

func (Dataset) BuildOverviews 

func (dataset Dataset) BuildOverviews(
	resampling string,
	nOverviews int,
	overviewList []int,
	nBands int,
	bandList []int,
	progress ProgressFunc,
	data interface{},
) error

Build raster overview(s)

func (Dataset) Close 

func (dataset Dataset) Close()

Close the dataset

func (Dataset) CopyWholeRaster 

func (sourceDataset Dataset) CopyWholeRaster(
	destDataset Dataset,
	options []string,
	progress ProgressFunc,
	data interface{},
) error

Copy all dataset raster data

func (Dataset) CreateMaskBand 

func (dataset Dataset) CreateMaskBand(flags int) error

Adds a mask band to the dataset

func (Dataset) Driver 

func (dataset Dataset) Driver() Driver

Get the driver to which this dataset relates

func (Dataset) FileList 

func (dataset Dataset) FileList() []string

Fetch files forming the dataset.

func (Dataset) FlushCache 

func (dataset Dataset) FlushCache()

Write all write cached data to disk

func (Dataset) GDALDereferenceDataset 

func (dataset Dataset) GDALDereferenceDataset() int

Subtract one from dataset reference count

func (Dataset) GDALGetGCPCount 

func (dataset Dataset) GDALGetGCPCount() int

Get number of GCPs

func (Dataset) GDALGetGCPProjection 

func (dataset Dataset) GDALGetGCPProjection() string

Get projection of GCPs

func (Dataset) GDALGetInternalHandle 

func (dataset Dataset) GDALGetInternalHandle(request string) unsafe.Pointer

Fetch a format specific internally meaningful handle

func (Dataset) GDALReferenceDataset 

func (dataset Dataset) GDALReferenceDataset() int

Add one to dataset reference count

func (Dataset) GeoTransform 

func (dataset Dataset) GeoTransform() [6]float64

Get the affine transformation coefficients

func (Dataset) IO 

func (dataset Dataset) IO(
	rwFlag RWFlag,
	xOff, yOff, xSize, ySize int,
	buffer interface{},
	bufXSize, bufYSize int,
	bandCount int,
	bandMap []int,
	pixelSpace, lineSpace, bandSpace int,
) error

Read / write a region of image data from multiple bands

func (Dataset) InvGeoTransform 

func (dataset Dataset) InvGeoTransform() [6]float64

Return the inverted transform

func (*Dataset) Metadata 

func (dataset *Dataset) Metadata(domain string) []string

func (*Dataset) MetadataItem 

func (object *Dataset) MetadataItem(name, domain string) string

func (Dataset) Projection 

func (dataset Dataset) Projection() string

Fetch the projection definition string for this dataset

func (Dataset) RasterBand 

func (dataset Dataset) RasterBand(band int) RasterBand

Fetch a raster band object from a dataset

func (Dataset) RasterCount 

func (dataset Dataset) RasterCount() int

Fetch the number of raster bands in the dataset

func (Dataset) RasterXSize 

func (dataset Dataset) RasterXSize() int

Fetch X size of raster

func (Dataset) RasterYSize 

func (dataset Dataset) RasterYSize() int

Fetch Y size of raster

func (Dataset) SetGeoTransform 

func (dataset Dataset) SetGeoTransform(transform [6]float64) error

Set the affine transformation coefficients

func (*Dataset) SetMetadataItem 

func (object *Dataset) SetMetadataItem(name, value, domain string) error

func (Dataset) SetProjection 

func (dataset Dataset) SetProjection(proj string) error

Set the projection reference string

type Driver 

type Driver struct {
	// contains filtered or unexported fields
}

func GetDriver 

func GetDriver(index int) Driver

Fetch driver by index

func GetDriverByName 

func GetDriverByName(driverName string) (Driver, error)

Return the driver by short name

func IdentifyDriver 

func IdentifyDriver(filename string, filenameList []string) Driver

Return the driver needed to access the provided dataset name.

func (Driver) CopyDatasetFiles 

func (driver Driver) CopyDatasetFiles(newName, oldName string) error

Copy all files associated with the named dataset

func (Driver) Create 

func (driver Driver) Create(
	filename string,
	xSize, ySize, bands int,
	dataType DataType,
	options []string,
) Dataset

Create a new dataset with this driver.

func (Driver) CreateCopy 

func (driver Driver) CreateCopy(
	filename string,
	sourceDataset Dataset,
	strict int,
	options []string,
	progress ProgressFunc,
	data interface{},
) Dataset

Create a copy of a dataset

func (Driver) DeleteDataset 

func (driver Driver) DeleteDataset(name string) error

Delete named dataset

func (Driver) Deregister 

func (driver Driver) Deregister()

Reregister the driver

func (Driver) Destroy 

func (driver Driver) Destroy()

Destroy a GDAL driver

func (Driver) LongName 

func (driver Driver) LongName() string

Get the long name associated with this driver

func (*Driver) MetadataItem 

func (object *Driver) MetadataItem(name, domain string) string

Fetch single metadata item.

func (Driver) Register 

func (driver Driver) Register() int

Registers a driver for use

func (Driver) RenameDataset 

func (driver Driver) RenameDataset(newName, oldName string) error

Rename named dataset

func (Driver) ShortName 

func (driver Driver) ShortName() string

Get the short name associated with this driver

type Envelope 

type Envelope struct {
	// contains filtered or unexported fields
}

func (Envelope) Contains 

func (env Envelope) Contains(other Envelope) bool

Test if one envelope completely contains another

func (Envelope) Intersect 

func (env Envelope) Intersect(other Envelope) Envelope

Return the intersection of this envelope with another

func (Envelope) Intersects 

func (env Envelope) Intersects(other Envelope) bool

Test if one envelope intersects another

func (Envelope) IsInit 

func (env Envelope) IsInit() bool

func (Envelope) MaxX 

func (env Envelope) MaxX() float64

func (Envelope) MaxY 

func (env Envelope) MaxY() float64

func (Envelope) MinX 

func (env Envelope) MinX() float64

func (Envelope) MinY 

func (env Envelope) MinY() float64

func (*Envelope) SetMaxX 

func (env *Envelope) SetMaxX(val float64)

func (*Envelope) SetMaxY 

func (env *Envelope) SetMaxY(val float64)

func (*Envelope) SetMinX 

func (env *Envelope) SetMinX(val float64)

func (*Envelope) SetMinY 

func (env *Envelope) SetMinY(val float64)

func (Envelope) Union 

func (env Envelope) Union(other Envelope) Envelope

Return the union of this envelope with another one

type Feature 

type Feature struct {
	// contains filtered or unexported fields
}

func (Feature) Clone 

func (feature Feature) Clone() Feature

Duplicate feature

func (Feature) Definition 

func (feature Feature) Definition() FeatureDefinition

Fetch feature definition

func (Feature) Destroy 

func (feature Feature) Destroy()

Destroy this feature

func (Feature) Equal 

func (f1 Feature) Equal(f2 Feature) bool

Test if two features are the same

func (Feature) FID 

func (feature Feature) FID() int64

Fetch feature indentifier

func (Feature) FieldAsBinary 

func (feature Feature) FieldAsBinary(index int) []uint8

Fetch field as binary data

func (Feature) FieldAsDateTime 

func (feature Feature) FieldAsDateTime(index int) (time.Time, bool)

Fetch field as date and time

func (Feature) FieldAsFloat64 

func (feature Feature) FieldAsFloat64(index int) float64

Fetch field value as float64

func (Feature) FieldAsFloat64List 

func (feature Feature) FieldAsFloat64List(index int) []float64

Fetch field as list of float64

func (Feature) FieldAsInteger 

func (feature Feature) FieldAsInteger(index int) int

Fetch field value as integer

func (Feature) FieldAsInteger64 

func (feature Feature) FieldAsInteger64(index int) int64

Fetch field value as 64-bit integer

func (Feature) FieldAsInteger64List 

func (feature Feature) FieldAsInteger64List(index int) []int64

Fetch field as list of 64-bit integers

func (Feature) FieldAsIntegerList 

func (feature Feature) FieldAsIntegerList(index int) []int

Fetch field as list of integers

func (Feature) FieldAsString 

func (feature Feature) FieldAsString(index int) string

Fetch field value as string

func (Feature) FieldAsStringList 

func (feature Feature) FieldAsStringList(index int) []string

Fetch field as list of strings

func (Feature) FieldCount 

func (feature Feature) FieldCount() int

Fetch number of fields on this feature

func (Feature) FieldDefinition 

func (feature Feature) FieldDefinition(index int) FieldDefinition

Fetch definition for the indicated field

func (Feature) FieldIndex 

func (feature Feature) FieldIndex(name string) int

Fetch the field index for the given field name

func (Feature) Geometry 

func (feature Feature) Geometry() Geometry

Fetch geometry of this feature

func (Feature) IsFieldSet 

func (feature Feature) IsFieldSet(index int) bool

Return if a field has ever been assigned a value

func (Feature) IsNull 

func (feature Feature) IsNull() bool

Returns true if this contains a null pointer

func (Feature) RawField 

func (feature Feature) RawField(index int) Field

Fetch a reference to the internal field value

func (Feature) SetFID 

func (feature Feature) SetFID(fid int64) error

Set feature identifier

func (Feature) SetFieldBinary 

func (feature Feature) SetFieldBinary(index int, value []uint8)

Set field as binary data

func (Feature) SetFieldDateTime 

func (feature Feature) SetFieldDateTime(index int, dt time.Time)

Set field as date / time

func (Feature) SetFieldFloat64 

func (feature Feature) SetFieldFloat64(index int, value float64)

Set field to float64 value

func (Feature) SetFieldFloat64List 

func (feature Feature) SetFieldFloat64List(index int, value []float64)

Set field to list of float64

func (Feature) SetFieldInteger 

func (feature Feature) SetFieldInteger(index, value int)

Set field to integer value

func (Feature) SetFieldInteger64 

func (feature Feature) SetFieldInteger64(index int, value int64)

Set field to 64-bit integer value

func (Feature) SetFieldInteger64List 

func (feature Feature) SetFieldInteger64List(index int, value []int64)

Set field to list of 64-bit integers

func (Feature) SetFieldIntegerList 

func (feature Feature) SetFieldIntegerList(index int, value []int)

Set field to list of integers

func (Feature) SetFieldRaw 

func (feature Feature) SetFieldRaw(index int, field Field)

Set field from the raw field pointer

func (Feature) SetFieldString 

func (feature Feature) SetFieldString(index int, value string)

Set field to string value

func (Feature) SetFieldStringList 

func (feature Feature) SetFieldStringList(index int, value []string)

Set field to list of strings

func (Feature) SetFrom 

func (this Feature) SetFrom(other Feature, forgiving int) error

Set one feature from another

func (Feature) SetFromWithMap 

func (this Feature) SetFromWithMap(other Feature, forgiving int, fieldMap []int) error

Set one feature from another, using field map

func (Feature) SetGeometry 

func (feature Feature) SetGeometry(geom Geometry) error

Set feature geometry

func (Feature) SetGeometryDirectly 

func (feature Feature) SetGeometryDirectly(geom Geometry) error

Set feature geometry, passing ownership to the feature

func (Feature) SetStyleString 

func (feature Feature) SetStyleString(style string)

Set style string for this feature

func (Feature) StealGeometry 

func (feature Feature) StealGeometry() Geometry

Fetch geometry of this feature and assume ownership

func (Feature) StlyeString 

func (feature Feature) StlyeString() string

Fetch style string for this feature

func (Feature) UnnsetField 

func (feature Feature) UnnsetField(index int)

Clear a field and mark it as unset

type FeatureDefinition 

type FeatureDefinition struct {
	// contains filtered or unexported fields
}

func CreateFeatureDefinition 

func CreateFeatureDefinition(name string) FeatureDefinition

Create a new feature definition object

func (FeatureDefinition) AddFieldDefinition 

func (fd FeatureDefinition) AddFieldDefinition(fieldDefn FieldDefinition)

Add a new field definition to this feature definition

func (FeatureDefinition) Create 

func (fd FeatureDefinition) Create() Feature

Create a feature from this feature definition

func (FeatureDefinition) DeleteFieldDefinition 

func (fd FeatureDefinition) DeleteFieldDefinition(index int) error

Delete a field definition from this feature definition

func (FeatureDefinition) Dereference 

func (fd FeatureDefinition) Dereference() int

Decrement the reference count by one

func (FeatureDefinition) Destroy 

func (fd FeatureDefinition) Destroy()

Destroy a feature definition object

func (FeatureDefinition) FieldCount 

func (fd FeatureDefinition) FieldCount() int

Fetch the number of fields in the feature definition

func (FeatureDefinition) FieldDefinition 

func (fd FeatureDefinition) FieldDefinition(index int) FieldDefinition

Fetch the definition of the indicated field

func (FeatureDefinition) FieldIndex 

func (fd FeatureDefinition) FieldIndex(name string) int

Fetch the index of the named field

func (FeatureDefinition) GeometryType 

func (fd FeatureDefinition) GeometryType() GeometryType

Fetch the geometry base type of this feature definition

func (FeatureDefinition) IsGeometryIgnored 

func (fd FeatureDefinition) IsGeometryIgnored() bool

Fetch if the geometry can be ignored when fetching features

func (FeatureDefinition) IsStyleIgnored 

func (fd FeatureDefinition) IsStyleIgnored() bool

Fetch if the style can be ignored when fetching features

func (FeatureDefinition) Name 

func (fd FeatureDefinition) Name() string

Fetch the name of this feature definition

func (FeatureDefinition) Reference 

func (fd FeatureDefinition) Reference() int

Increment the reference count by one

func (FeatureDefinition) ReferenceCount 

func (fd FeatureDefinition) ReferenceCount() int

Fetch the current reference count

func (FeatureDefinition) Release 

func (fd FeatureDefinition) Release()

Drop a reference, and delete object if no references remain

func (FeatureDefinition) SetGeometryIgnored 

func (fd FeatureDefinition) SetGeometryIgnored(val bool)

Set whether the geometry can be ignored when fetching features

func (FeatureDefinition) SetGeometryType 

func (fd FeatureDefinition) SetGeometryType(geomType GeometryType)

Set the geometry base type for this feature definition

func (FeatureDefinition) SetStyleIgnored 

func (fd FeatureDefinition) SetStyleIgnored(val bool)

Set whether the style can be ignored when fetching features

type Field 

type Field struct {
	// contains filtered or unexported fields
}

type FieldDefinition 

type FieldDefinition struct {
	// contains filtered or unexported fields
}

func CreateFieldDefinition 

func CreateFieldDefinition(name string, fieldType FieldType) FieldDefinition

Create a new field definition

func (FieldDefinition) Destroy 

func (fd FieldDefinition) Destroy()

Destroy the field definition

func (FieldDefinition) IsIgnored 

func (fd FieldDefinition) IsIgnored() bool

Fetch whether this field should be ignored when fetching features

func (FieldDefinition) Justification 

func (fd FieldDefinition) Justification() Justification

Fetch the justification for this field

func (FieldDefinition) Name 

func (fd FieldDefinition) Name() string

Fetch the name of the field

func (FieldDefinition) Precision 

func (fd FieldDefinition) Precision() int

Fetch the precision for this field

func (FieldDefinition) Set 

func (fd FieldDefinition) Set(
	name string,
	fType FieldType,
	width, precision int,
	justify Justification,
)

Set defining parameters of field in a single call

func (FieldDefinition) SetIgnored 

func (fd FieldDefinition) SetIgnored(ignore bool)

Set whether this field should be ignored when fetching features

func (FieldDefinition) SetJustification 

func (fd FieldDefinition) SetJustification(justify Justification)

Set the justification for this field

func (FieldDefinition) SetName 

func (fd FieldDefinition) SetName(name string)

Set the name of the field

func (FieldDefinition) SetPrecision 

func (fd FieldDefinition) SetPrecision(precision int)

Set the precision for this field

func (FieldDefinition) SetType 

func (fd FieldDefinition) SetType(fType FieldType)

Set the type of this field

func (FieldDefinition) SetWidth 

func (fd FieldDefinition) SetWidth(width int)

Set the formatting width for this field

func (FieldDefinition) Type 

func (fd FieldDefinition) Type() FieldType

Fetch the type of this field

func (FieldDefinition) Width 

func (fd FieldDefinition) Width() int

Fetch the formatting width for this field

type FieldType 

type FieldType int

List of well known binary geometry types

func (FieldType) Name 

func (ft FieldType) Name() string

Fetch human readable name for the field type

type GDALTranslateOptions 

type GDALTranslateOptions struct {
	// contains filtered or unexported fields
}

type GDALWarpAppOptions 

type GDALWarpAppOptions struct {
	// contains filtered or unexported fields
}

type GDALWarpOptions 

type GDALWarpOptions struct {
	// contains filtered or unexported fields
}

type Geometry 

type Geometry struct {
	// contains filtered or unexported fields
}

func ApproximateArcAngles 

func ApproximateArcAngles(
	x, y, z,
	primaryRadius,
	secondaryRadius,
	rotation,
	startAngle,
	endAngle,
	stepSizeDegrees float64,
) Geometry

Stroke arc to linestring

func Create 

func Create(geomType GeometryType) Geometry

Create an empty geometry of the desired type

func CreateFromGML 

func CreateFromGML(gml string) Geometry

Create a geometry from its GML representation

func CreateFromJson 

func CreateFromJson(_json string) Geometry

Create a geometry object from its GeoJSON representation

func CreateFromWKB 

func CreateFromWKB(wkb []uint8, srs SpatialReference, bytes int) (Geometry, error)

Create a geometry object from its well known binary representation

func CreateFromWKT 

func CreateFromWKT(wkt string, srs SpatialReference) (Geometry, error)

Create a geometry object from its well known text representation

func (Geometry) AddGeometry 

func (geom Geometry) AddGeometry(other Geometry) error

Add a geometry to a geometry container

func (Geometry) AddGeometryDirectly 

func (geom Geometry) AddGeometryDirectly(other Geometry) error

Add a geometry to a geometry container and assign ownership to that container

func (Geometry) AddPoint 

func (geom Geometry) AddPoint(x, y, z float64)

Add a new point to the geometry (line string or polygon only)

func (Geometry) AddPoint2D 

func (geom Geometry) AddPoint2D(x, y float64)

Add a new point to the geometry (line string or polygon only), ignoring the 3rd dimension

func (Geometry) Area 

func (geom Geometry) Area() float64

Compute area of geometry

func (Geometry) Boundary 

func (geom Geometry) Boundary() Geometry

Compute boundary for the geometry

func (Geometry) Buffer 

func (geom Geometry) Buffer(distance float64, segments int) Geometry

Compute buffer of the geometry

func (Geometry) BuildPolygonFromEdges 

func (geom Geometry) BuildPolygonFromEdges(autoClose bool, tolerance float64) (Geometry, error)

Build a polygon / ring from a set of lines

func (Geometry) Centroid 

func (geom Geometry) Centroid() Geometry

Compute centroid of geometry

func (Geometry) Clone 

func (geom Geometry) Clone() Geometry

Create a copy of this geometry

func (Geometry) CloseRings 

func (geom Geometry) CloseRings()

Force rings to be closed

func (Geometry) Contains 

func (geom Geometry) Contains(other Geometry) bool

Return true if this geometry contains the other

func (Geometry) ConvexHull 

func (geom Geometry) ConvexHull() Geometry

Compute convex hull for the geometry

func (Geometry) CoordinateDimension 

func (geom Geometry) CoordinateDimension() int

Get the dimension of the coordinates in this geometry

func (Geometry) Crosses 

func (geom Geometry) Crosses(other Geometry) bool

Return true if this feature crosses the other

func (Geometry) Destroy 

func (geometry Geometry) Destroy()

Destroy geometry object

func (Geometry) Difference 

func (geom Geometry) Difference(other Geometry) Geometry

Compute difference between this geometry and the other

func (Geometry) Dimension 

func (geom Geometry) Dimension() int

Get the dimension of this geometry

func (Geometry) Disjoint 

func (geom Geometry) Disjoint(other Geometry) bool

Return true if the features are disjoint

func (Geometry) Distance 

func (geom Geometry) Distance(other Geometry) float64

Compute distance between thie geometry and the other

func (Geometry) Distance3D 

func (geom Geometry) Distance3D(other Geometry) float64

Compute 3D distance between thie geometry and the other. This method is built on the SFCGAL library, check it for the definition of the geometry operation. If OGR is built without the SFCGAL library, this method will always return -1.0

func (Geometry) Empty 

func (geom Geometry) Empty()

Clear the geometry to its uninitialized state

func (Geometry) Envelope 

func (geom Geometry) Envelope() Envelope

Compute and return the bounding envelope for this geometry

func (Geometry) Equals 

func (geom Geometry) Equals(other Geometry) bool

Return true if these features are equal

func (Geometry) FlattenTo2D 

func (geom Geometry) FlattenTo2D()

Convert geometry to strictly 2D

func (Geometry) ForceToMultiLineString 

func (geom Geometry) ForceToMultiLineString() Geometry

Convert to multilinestring

func (Geometry) ForceToMultiPoint 

func (geom Geometry) ForceToMultiPoint() Geometry

Convert to multipoint

func (Geometry) ForceToMultiPolygon 

func (geom Geometry) ForceToMultiPolygon() Geometry

Convert to multipolygon

func (Geometry) ForceToPolygon 

func (geom Geometry) ForceToPolygon() Geometry

Convert to polygon

func (Geometry) FromWKB 

func (geom Geometry) FromWKB(wkb []uint8, bytes int) error

Assign a geometry from well known binary data

func (Geometry) FromWKT 

func (geom Geometry) FromWKT(wkt string) error

Assign geometry object from its well known text representation

func (Geometry) Geometry 

func (geom Geometry) Geometry(index int) Geometry

Fetch geometry from a geometry container

func (Geometry) GeometryCount 

func (geom Geometry) GeometryCount() int

Fetch the number of elements in the geometry, or number of geometries in the container

func (Geometry) Intersection 

func (geom Geometry) Intersection(other Geometry) Geometry

Compute intersection of this geometry with the other

func (Geometry) Intersects 

func (geom Geometry) Intersects(other Geometry) bool

Return true if these features intersect

func (Geometry) IsEmpty 

func (geom Geometry) IsEmpty() bool

Test if the geometry is empty

func (Geometry) IsNull 

func (geom Geometry) IsNull() bool

Test if the geometry is null

func (Geometry) IsRing 

func (geom Geometry) IsRing() bool

Test if the geometry is a ring

func (Geometry) IsSimple 

func (geom Geometry) IsSimple() bool

Test if the geometry is simple

func (Geometry) IsValid 

func (geom Geometry) IsValid() bool

Test if the geometry is valid

func (Geometry) Length 

func (geom Geometry) Length() float64

Compute length of geometry

func (Geometry) Name 

func (geom Geometry) Name() string

Fetch geometry name

func (Geometry) Overlaps 

func (geom Geometry) Overlaps(other Geometry) bool

Return true if this geometry overlaps the other

func (Geometry) Point 

func (geom Geometry) Point(index int) (x, y, z float64)

Fetch the coordinates of a point in the geometry

func (Geometry) PointCount 

func (geom Geometry) PointCount() int

Fetch number of points in the geometry

func (Geometry) Polygonize 

func (geom Geometry) Polygonize() Geometry

Polygonize a set of sparse edges

func (Geometry) RemoveGeometry 

func (geom Geometry) RemoveGeometry(index int, delete bool) error

Remove a geometry from the geometry container

func (Geometry) Segmentize 

func (geom Geometry) Segmentize(distance float64)

Modify the geometry such that it has no line segment longer than the given distance

func (Geometry) SetCoordinateDimension 

func (geom Geometry) SetCoordinateDimension(dim int)

Set the dimension of the coordinates in this geometry

func (Geometry) SetPoint 

func (geom Geometry) SetPoint(index int, x, y, z float64)

Set the coordinates of a point in the geometry

func (Geometry) SetPoint2D 

func (geom Geometry) SetPoint2D(index int, x, y float64)

Set the coordinates of a point in the geometry, ignoring the 3rd dimension

func (Geometry) SetSpatialReference 

func (geom Geometry) SetSpatialReference(spatialRef SpatialReference)

Assign a spatial reference to this geometry

func (Geometry) Simplify 

func (geom Geometry) Simplify(tolerance float64) Geometry

Simplify the geometry

func (Geometry) SimplifyPreservingTopology 

func (geom Geometry) SimplifyPreservingTopology(tolerance float64) Geometry

Simplify the geometry while preserving topology

func (Geometry) SpatialReference 

func (geom Geometry) SpatialReference() SpatialReference

Fetch the spatial reference associated with this geometry

func (Geometry) SymmetricDifference 

func (geom Geometry) SymmetricDifference(other Geometry) Geometry

Compute symmetric difference between this geometry and the other

func (Geometry) ToGML 

func (geom Geometry) ToGML() string

Convert a geometry to GML format

func (Geometry) ToGML_Ex 

func (geom Geometry) ToGML_Ex(options []string) string

Convert a geometry to GML format with options

func (Geometry) ToJSON 

func (geom Geometry) ToJSON() string

Convert a geometry to JSON format

func (Geometry) ToJSON_ex 

func (geom Geometry) ToJSON_ex(options []string) string

Convert a geometry to JSON format with options

func (Geometry) ToKML 

func (geom Geometry) ToKML() string

Convert a geometry to KML format

func (Geometry) ToWKB 

func (geom Geometry) ToWKB() ([]uint8, error)

Convert a geometry to well known binary data

func (Geometry) ToWKT 

func (geom Geometry) ToWKT() (string, error)

Fetch geometry as WKT

func (Geometry) Touches 

func (geom Geometry) Touches(other Geometry) bool

Return true if this feature touches the other

func (Geometry) Transform 

func (geom Geometry) Transform(ct CoordinateTransform) error

Apply coordinate transformation to geometry

func (Geometry) TransformTo 

func (geom Geometry) TransformTo(sr SpatialReference) error

Transform geometry to new spatial reference system

func (Geometry) Type 

func (geom Geometry) Type() GeometryType

Fetch geometry type

func (Geometry) Union 

func (geom Geometry) Union(other Geometry) Geometry

Compute union of this geometry with the other

func (Geometry) UnionCascaded 

func (geom Geometry) UnionCascaded() Geometry

func (Geometry) WKBSize 

func (geom Geometry) WKBSize() int

Returns size of related binary representation

func (Geometry) Within 

func (geom Geometry) Within(other Geometry) bool

Return true if this geometry is within the other

func (Geometry) X 

func (geom Geometry) X(index int) float64

Fetch the X coordinate of a point in the geometry

func (Geometry) Y 

func (geom Geometry) Y(index int) float64

Fetch the Y coordinate of a point in the geometry

func (Geometry) Z 

func (geom Geometry) Z(index int) float64

Fetch the Z coordinate of a point in the geometry

type GeometryType 

type GeometryType uint32

List of well known binary geometry types

type Justification 

type Justification int

type Layer 

type Layer struct {
	// contains filtered or unexported fields
}

func (Layer) AlterFieldDefn 

func (layer Layer) AlterFieldDefn(index int, newDefn FieldDefinition, flags int) error

Alter the definition of an existing field of a layer

func (Layer) CommitTransaction 

func (layer Layer) CommitTransaction() error

Commit a transaction on data sources which support it

func (Layer) Create 

func (layer Layer) Create(feature Feature) error

Create and write a new feature within a layer

func (Layer) CreateField 

func (layer Layer) CreateField(fd FieldDefinition, approxOK bool) error

Create a new field on a layer

func (Layer) Definition 

func (layer Layer) Definition() FeatureDefinition

Fetch the schema information for this layer

func (Layer) Delete 

func (layer Layer) Delete(index int64) error

Delete indicated feature from layer

func (Layer) DeleteField 

func (layer Layer) DeleteField(index int) error

Delete a field from the layer

func (Layer) Extent 

func (layer Layer) Extent(force bool) (env Envelope, err error)

Fetch the extent of this layer

func (Layer) FIDColumn 

func (layer Layer) FIDColumn() string

Fetch the name of the FID column

func (Layer) Feature 

func (layer Layer) Feature(index int64) Feature

Fetch a feature by its index

func (Layer) FeatureCount 

func (layer Layer) FeatureCount(force bool) (count int, ok bool)

Fetch the feature count for this layer

func (Layer) GeometryColumn 

func (layer Layer) GeometryColumn() string

Fetch the name of the geometry column

func (Layer) Name 

func (layer Layer) Name() string

Return the layer name

func (Layer) NextFeature 

func (layer Layer) NextFeature() *Feature

Fetch the next available feature from this layer

func (Layer) ReorderField 

func (layer Layer) ReorderField(oldIndex, newIndex int) error

Reorder an existing field of a layer

func (Layer) ReorderFields 

func (layer Layer) ReorderFields(layerMap []int) error

Reorder all the fields of a layer

func (Layer) ResetReading 

func (layer Layer) ResetReading()

Reset reading to start on the first featre

func (Layer) RollbackTransaction 

func (layer Layer) RollbackTransaction() error

Roll back the current transaction on data sources which support it

func (Layer) SetAttributeFilter 

func (layer Layer) SetAttributeFilter(filter string) error

Set a new attribute query filter

func (Layer) SetFeature 

func (layer Layer) SetFeature(feature Feature) error

Rewrite the provided feature

func (Layer) SetIgnoredFields 

func (layer Layer) SetIgnoredFields(names []string) error

Set which fields can be ignored when retrieving features from the layer

func (Layer) SetNextByIndex 

func (layer Layer) SetNextByIndex(index int64) error

Move read cursor to the provided index

func (Layer) SetSpatialFilter 

func (layer Layer) SetSpatialFilter(filter Geometry)

Set a new spatial filter for this layer

func (Layer) SetSpatialFilterRect 

func (layer Layer) SetSpatialFilterRect(minX, minY, maxX, maxY float64)

Set a new rectangular spatial filter for this layer

func (Layer) SpatialFilter 

func (layer Layer) SpatialFilter() Geometry

Return the current spatial filter for this layer

func (Layer) SpatialReference 

func (layer Layer) SpatialReference() SpatialReference

Fetch the spatial reference system for this layer

func (Layer) StartTransaction 

func (layer Layer) StartTransaction() error

Begin a transation on data sources which support it

func (Layer) Sync 

func (layer Layer) Sync() error

Flush pending changes to the layer

func (Layer) TestCapability 

func (layer Layer) TestCapability(capability string) bool

Test if this layer supports the named capability

func (Layer) Type 

func (layer Layer) Type() GeometryType

Return the layer geometry type

type MajorObject 

type MajorObject struct {
	// contains filtered or unexported fields
}

func (MajorObject) Description 

func (object MajorObject) Description() string

Fetch object description

func (MajorObject) Metadata 

func (object MajorObject) Metadata(domain string) []string

Fetch metadata

func (MajorObject) MetadataItem 

func (object MajorObject) MetadataItem(name, domain string) string

Fetch a single metadata item

func (MajorObject) SetDescription 

func (object MajorObject) SetDescription(desc string)

Set object description

func (MajorObject) SetMetadata 

func (object MajorObject) SetMetadata(metadata []string, domain string)

Set metadata

func (MajorObject) SetMetadataItem 

func (object MajorObject) SetMetadataItem(name, value, domain string)

Set a single metadata item

type OGRDriver 

type OGRDriver struct {
	// contains filtered or unexported fields
}

func OGRDriverByIndex 

func OGRDriverByIndex(index int) OGRDriver

Fetch the indicated driver by index

func OGRDriverByName 

func OGRDriverByName(name string) OGRDriver

Fetch the indicated driver by name

func (OGRDriver) Copy 

func (driver OGRDriver) Copy(source DataSource, name string, options []string) (newDS DataSource, ok bool)

Create a new datasource with this driver by copying all layers of the existing datasource

func (OGRDriver) Create 

func (driver OGRDriver) Create(name string, options []string) (newDS DataSource, ok bool)

Create a new data source based on this driver

func (OGRDriver) Delete 

func (driver OGRDriver) Delete(filename string) error

Delete a data source

func (OGRDriver) Deregister 

func (driver OGRDriver) Deregister()

Remove a driver from the list of registered drivers

func (OGRDriver) Name 

func (driver OGRDriver) Name() string

Fetch name of driver (file format)

func (OGRDriver) Open 

func (driver OGRDriver) Open(filename string, update int) (newDS DataSource, ok bool)

Attempt to open file with this driver

func (OGRDriver) Register 

func (driver OGRDriver) Register()

Add a driver to the list of registered drivers

func (OGRDriver) TestCapability 

func (driver OGRDriver) TestCapability(capability string) bool

Test if this driver supports the named capability

type OpenFlag 

type OpenFlag uint

type PaletteInterp 

type PaletteInterp int

Types of color interpretations for a GDALColorTable.

func (PaletteInterp) Name 

func (paletteInterp PaletteInterp) Name() string

type ProgressFunc 

type ProgressFunc func(complete float64, message string, progressArg interface{}) int

type RATFieldType 

type RATFieldType int

type RATFieldUsage 

type RATFieldUsage int

type RWFlag 

type RWFlag int

Read/Write flag for RasterIO() method

type RasterAttributeTable 

type RasterAttributeTable struct {
	// contains filtered or unexported fields
}

func CreateRasterAttributeTable 

func CreateRasterAttributeTable() RasterAttributeTable

Construct empty raster attribute table

func (RasterAttributeTable) ColOfUsage 

func (rat RasterAttributeTable) ColOfUsage(rfu RATFieldUsage) int

Fetch column index for indicated usage

func (RasterAttributeTable) ColumnCount 

func (rat RasterAttributeTable) ColumnCount() int

Fetch table column count

func (RasterAttributeTable) CreateColumn 

func (rat RasterAttributeTable) CreateColumn(name string, rft RATFieldType, rfu RATFieldUsage) error

Create new column

func (RasterAttributeTable) Destroy 

func (rat RasterAttributeTable) Destroy()

Destroy a RAT

func (RasterAttributeTable) FromColorTable 

func (rat RasterAttributeTable) FromColorTable(ct ColorTable) error

Initialize RAT from color table

func (RasterAttributeTable) LinearBinning 

func (rat RasterAttributeTable) LinearBinning() (row0min, binsize float64, exists bool)

Fetch linear binning information

func (RasterAttributeTable) NameOfCol 

func (rat RasterAttributeTable) NameOfCol(index int) string

Fetch the name of indicated column

func (RasterAttributeTable) RowCount 

func (rat RasterAttributeTable) RowCount() int

Fetch row count

func (RasterAttributeTable) RowOfValue 

func (rat RasterAttributeTable) RowOfValue(val float64) (int, bool)

Get row for pixel value

func (RasterAttributeTable) SetLinearBinning 

func (rat RasterAttributeTable) SetLinearBinning(row0min, binsize float64) error

Set linear binning information

func (RasterAttributeTable) SetRowCount 

func (rat RasterAttributeTable) SetRowCount(count int)

Set row count

func (RasterAttributeTable) SetValueAsFloat64 

func (rat RasterAttributeTable) SetValueAsFloat64(row, field int, val float64)

Set field value from float64

func (RasterAttributeTable) SetValueAsInt 

func (rat RasterAttributeTable) SetValueAsInt(row, field, val int)

Set field value from integer

func (RasterAttributeTable) SetValueAsString 

func (rat RasterAttributeTable) SetValueAsString(row, field int, val string)

Set field value from string

func (RasterAttributeTable) ToColorTable 

func (rat RasterAttributeTable) ToColorTable(count int) ColorTable

Translate RAT to a color table

func (RasterAttributeTable) TypeOfCol 

func (rat RasterAttributeTable) TypeOfCol(index int) RATFieldType

Fetch the type of indicated column

func (RasterAttributeTable) UsageOfCol 

func (rat RasterAttributeTable) UsageOfCol(index int) RATFieldUsage

Fetch the usage of indicated column

func (RasterAttributeTable) ValueAsFloat64 

func (rat RasterAttributeTable) ValueAsFloat64(row, field int) float64

Fetch field value as float64

func (RasterAttributeTable) ValueAsInt 

func (rat RasterAttributeTable) ValueAsInt(row, field int) int

Fetch field value as integer

func (RasterAttributeTable) ValueAsString 

func (rat RasterAttributeTable) ValueAsString(row, field int) string

Fetch field value as string

type RasterBand 

type RasterBand struct {
	// contains filtered or unexported fields
}

func (RasterBand) AdviseRead 

func (rasterBand RasterBand) AdviseRead(
	xOff, yOff, xSize, ySize, bufXSize, bufYSize int,
	dataType DataType,
	options []string,
) error

Advise driver of upcoming read requests

func (RasterBand) BandNumber 

func (rasterBand RasterBand) BandNumber() int

Fetch the band number of this raster band

func (RasterBand) BlockSize 

func (rasterBand RasterBand) BlockSize() (int, int)

Fetch the "natural" block size of this band

func (RasterBand) CategoryNames 

func (rasterBand RasterBand) CategoryNames() []string

Fetch the list of category names for this raster

func (RasterBand) Checksum 

func (rb RasterBand) Checksum(xOff, yOff, xSize, ySize int) int

Compute checksum for image region

func (RasterBand) ColorInterp 

func (rasterBand RasterBand) ColorInterp() ColorInterp

How should this band be interpreted as color?

func (RasterBand) ColorTable 

func (rasterBand RasterBand) ColorTable() ColorTable

Fetch the color table associated with this raster band

func (RasterBand) ComputeMinMax 

func (rasterBand RasterBand) ComputeMinMax(approxOK int) (min, max float64)

Compute the min / max values for a band

func (RasterBand) ComputeProximity 

func (src RasterBand) ComputeProximity(
	dest RasterBand,
	options []string,
	progress ProgressFunc,
	data interface{},
) error

Compute the proximity of all pixels in the image to a set of pixels in the source image

func (RasterBand) ComputeStatistics 

func (rasterBand RasterBand) ComputeStatistics(
	approxOK int,
	progress ProgressFunc,
	data interface{},
) (min, max, mean, stdDev float64)

Compute image statistics

func (RasterBand) CreateMaskBand 

func (rasterBand RasterBand) CreateMaskBand(flags int) error

Adds a mask band to the current band

func (RasterBand) DefaultHistogram 

func (rasterBand RasterBand) DefaultHistogram(
	force int,
	progress ProgressFunc,
	data interface{},
) (min, max float64, buckets int, histogram []int, err error)

Fetch default raster histogram

func (RasterBand) FPolygonize 

func (src RasterBand) FPolygonize(
	mask RasterBand,
	layer Layer,
	fieldIndex int,
	options []string,
	progress ProgressFunc,
	data interface{},
) error

Create polygon coverage from raster data using a floating point buffer

func (RasterBand) Fill 

func (rasterBand RasterBand) Fill(real, imaginary float64) error

Fill this band with a constant value

func (RasterBand) FillNoData 

func (src RasterBand) FillNoData(
	mask RasterBand,
	distance float64,
	iterations int,
	options []string,
	progress ProgressFunc,
	data interface{},
) error

Fill selected raster regions by interpolation from the edges

func (RasterBand) FlushCache 

func (rasterBand RasterBand) FlushCache()

Flush raster data cache

func (RasterBand) GetAccess 

func (rasterBand RasterBand) GetAccess() Access

Find out if we have update permission for this band

func (RasterBand) GetDataset 

func (rasterBand RasterBand) GetDataset() Dataset

Fetch the owning dataset handle

func (RasterBand) GetDefaultRAT 

func (rasterBand RasterBand) GetDefaultRAT() RasterAttributeTable

Fetch default Raster Attribute Table

func (RasterBand) GetMaskBand 

func (rasterBand RasterBand) GetMaskBand() RasterBand

Return the mask band associated with the band

func (RasterBand) GetMaskFlags 

func (rasterBand RasterBand) GetMaskFlags() int

Return the status flags of the mask band associated with the band

func (RasterBand) GetMaximum 

func (rasterBand RasterBand) GetMaximum() (val float64, valid bool)

Fetch the maximum value for this band

func (RasterBand) GetMinimum 

func (rasterBand RasterBand) GetMinimum() (val float64, valid bool)

Fetch the minimum value for this band

func (RasterBand) GetOffset 

func (rasterBand RasterBand) GetOffset() (float64, bool)

Fetch the raster value offset

func (RasterBand) GetScale 

func (rasterBand RasterBand) GetScale() (float64, bool)

Fetch the raster value scale

func (RasterBand) GetStatistics 

func (rasterBand RasterBand) GetStatistics(approxOK, force int) (min, max, mean, stdDev float64)

Fetch image statistics

func (RasterBand) GetUnitType 

func (rasterBand RasterBand) GetUnitType() string

Return raster unit type

func (RasterBand) HasArbitraryOverviews 

func (rasterBand RasterBand) HasArbitraryOverviews() int

Check for arbitrary overviews

func (RasterBand) Histogram 

func (rasterBand RasterBand) Histogram(
	min, max float64,
	buckets int,
	includeOutOfRange, approxOK int,
	progress ProgressFunc,
	data interface{},
) ([]int, error)

Compute raster histogram

func (RasterBand) IO 

func (rasterBand RasterBand) IO(
	rwFlag RWFlag,
	xOff, yOff, xSize, ySize int,
	buffer interface{},
	bufXSize, bufYSize int,
	pixelSpace, lineSpace int,
) error

Read / Write a region of image data for this band

func (*RasterBand) MetadataItem 

func (object *RasterBand) MetadataItem(name, domain string) string

func (RasterBand) NoDataValue 

func (rasterBand RasterBand) NoDataValue() (val float64, valid bool)

Fetch the no data value for this band

func (RasterBand) Overview 

func (rasterBand RasterBand) Overview(level int) RasterBand

Fetch overview raster band object

func (RasterBand) OverviewCount 

func (rasterBand RasterBand) OverviewCount() int

Return the number of overview layers available

func (RasterBand) Polygonize 

func (src RasterBand) Polygonize(
	mask RasterBand,
	layer Layer,
	fieldIndex int,
	options []string,
	progress ProgressFunc,
	data interface{},
) error

Create polygon coverage from raster data using an integer buffer

func (RasterBand) RasterBandCopyWholeRaster 

func (sourceRaster RasterBand) RasterBandCopyWholeRaster(
	destRaster RasterBand,
	options []string,
	progress ProgressFunc,
	data interface{},
) error

Copy all raster band raster data

func (RasterBand) RasterDataType 

func (rasterBand RasterBand) RasterDataType() DataType

Fetch the pixel data type for this band

func (RasterBand) ReadBlock 

func (rasterBand RasterBand) ReadBlock(xOff, yOff int, dataPtr unsafe.Pointer) error

Read a block of image data efficiently

func (RasterBand) SetColorInterp 

func (rasterBand RasterBand) SetColorInterp(colorInterp ColorInterp) error

Set color interpretation of the raster band

func (RasterBand) SetColorTable 

func (rasterBand RasterBand) SetColorTable(colorTable ColorTable) error

Set the raster color table for this raster band

func (RasterBand) SetDefaultRAT 

func (rasterBand RasterBand) SetDefaultRAT(rat RasterAttributeTable) error

Set default Raster Attribute Table

func (*RasterBand) SetMetadataItem 

func (rasterBand *RasterBand) SetMetadataItem(name, value, domain string) error

func (RasterBand) SetNoDataValue 

func (rasterBand RasterBand) SetNoDataValue(val float64) error

Set the no data value for this band

func (RasterBand) SetOffset 

func (rasterBand RasterBand) SetOffset(offset float64) error

Set scaling offset

func (RasterBand) SetRasterCategoryNames 

func (rasterBand RasterBand) SetRasterCategoryNames(names []string) error

Set the category names for this band

func (RasterBand) SetScale 

func (rasterBand RasterBand) SetScale(scale float64) error

Set scaling ratio

func (RasterBand) SetStatistics 

func (rasterBand RasterBand) SetStatistics(min, max, mean, stdDev float64) error

Set statistics on raster band

func (RasterBand) SetUnitType 

func (rasterBand RasterBand) SetUnitType(unit string) error

Set unit type

func (RasterBand) SieveFilter 

func (src RasterBand) SieveFilter(
	mask, dest RasterBand,
	threshold, connectedness int,
	options []string,
	progress ProgressFunc,
	data interface{},
) error

Removes small raster polygons

func (RasterBand) WriteBlock 

func (rasterBand RasterBand) WriteBlock(xOff, yOff int, dataPtr unsafe.Pointer) error

Write a block of image data efficiently

func (RasterBand) XSize 

func (rasterBand RasterBand) XSize() int

Fetch X size of raster

func (RasterBand) YSize 

func (rasterBand RasterBand) YSize() int

Fetch Y size of raster

type ResampleAlg 

type ResampleAlg int

type SpatialReference 

type SpatialReference struct {
	// contains filtered or unexported fields
}

func CreateSpatialReference 

func CreateSpatialReference(wkt string) SpatialReference

Create a new SpatialReference

func (SpatialReference) AngularUnits 

func (sr SpatialReference) AngularUnits() (string, float64)

Fetch the angular units for the geographic coordinate system

func (SpatialReference) AttrValue 

func (sr SpatialReference) AttrValue(key string, child int) (value string, ok bool)

Fetch indicated attribute of named node

func (SpatialReference) AuthorityCode 

func (sr SpatialReference) AuthorityCode(target string) string

Get the authority code for a node

func (SpatialReference) AuthorityName 

func (sr SpatialReference) AuthorityName(target string) string

Get the authority name for a node

func (SpatialReference) AutoIdentifyEPSG 

func (sr SpatialReference) AutoIdentifyEPSG() error

Set EPSG authority info if possible

func (SpatialReference) Clone 

func (sr SpatialReference) Clone() SpatialReference

Make a duplicate of this spatial reference

func (SpatialReference) CloneGeogCS 

func (sr SpatialReference) CloneGeogCS() SpatialReference

Make a duplicate of the GEOGCS node of this spatial reference

func (SpatialReference) CopyGeographicCSFrom 

func (sr SpatialReference) CopyGeographicCSFrom(other SpatialReference) error

Copy geographic CS from another spatial reference

func (SpatialReference) Dereference 

func (sr SpatialReference) Dereference() int

Decrements the reference count by one, returning reference count

func (SpatialReference) Destroy 

func (sr SpatialReference) Destroy()

Destroy the spatial reference

func (SpatialReference) EPSGTreatsAsLatLong 

func (sr SpatialReference) EPSGTreatsAsLatLong() bool

Return true if EPSG feels this coordinate system should be treated as having lat/long coordinate ordering

func (SpatialReference) Fixup 

func (sr SpatialReference) Fixup() error

Fix up spatial reference as needed

func (SpatialReference) FixupOrdering 

func (sr SpatialReference) FixupOrdering() error

Correct parameter ordering to match CT specification

func (SpatialReference) FromEPSG 

func (sr SpatialReference) FromEPSG(code int) error

Initialize SRS based on EPSG code

func (SpatialReference) FromEPSGA 

func (sr SpatialReference) FromEPSGA(code int) error

Initialize SRS based on EPSG code, using EPSG lat/long ordering

func (SpatialReference) FromERM 

func (sr SpatialReference) FromERM(proj, datum, units string) error

Import coordinate system from ERMapper projection definitions

func (SpatialReference) FromESRI 

func (sr SpatialReference) FromESRI(input string) error

Import coordinate system from ESRI .prj formats

func (SpatialReference) FromPCI 

func (sr SpatialReference) FromPCI(proj, units string, params []float64) error

Import coordinate system from PCI projection definition

func (SpatialReference) FromProj4 

func (sr SpatialReference) FromProj4(input string) error

Import PROJ.4 coordinate string

func (SpatialReference) FromURL 

func (sr SpatialReference) FromURL(url string) error

Import coordinate system from a URL

func (SpatialReference) FromUSGS 

func (sr SpatialReference) FromUSGS(projsys, zone int, params []float64, datum int) error

Import coordinate system from USGS projection definition

func (SpatialReference) FromWKT 

func (sr SpatialReference) FromWKT(wkt string) error

Initialize SRS based on WKT string

func (SpatialReference) FromXML 

func (sr SpatialReference) FromXML(xml string) error

Import coordinate system from XML format (GML only currently)

func (SpatialReference) InverseFlattening 

func (sr SpatialReference) InverseFlattening() (float64, error)

Get spheroid inverse flattening axis

func (SpatialReference) IsCompound 

func (sr SpatialReference) IsCompound() bool

Return true if compound coordinate system

func (SpatialReference) IsGeocentric 

func (sr SpatialReference) IsGeocentric() bool

Return true if geocentric coordinate system

func (SpatialReference) IsGeographic 

func (sr SpatialReference) IsGeographic() bool

Return true if geographic coordinate system

func (SpatialReference) IsLocal 

func (sr SpatialReference) IsLocal() bool

Return true if local coordinate system

func (SpatialReference) IsProjected 

func (sr SpatialReference) IsProjected() bool

Return true if projected coordinate system

func (SpatialReference) IsSame 

func (sr SpatialReference) IsSame(other SpatialReference) bool

Return true if the coordinate systems describe the same system

func (SpatialReference) IsSameGeographicCS 

func (sr SpatialReference) IsSameGeographicCS(other SpatialReference) bool

Return true if the geographic coordinate systems match

func (SpatialReference) IsSameVerticalCS 

func (sr SpatialReference) IsSameVerticalCS(other SpatialReference) bool

Return true if the vertical coordinate systems match

func (SpatialReference) IsVertical 

func (sr SpatialReference) IsVertical() bool

Return true if vertical coordinate system

func (SpatialReference) LinearUnits 

func (sr SpatialReference) LinearUnits() (string, float64)

Fetch linear projection units

func (SpatialReference) MorphFromESRI 

func (sr SpatialReference) MorphFromESRI() error

Convert in place from ESRI WKT format

func (SpatialReference) MorphToESRI 

func (sr SpatialReference) MorphToESRI() error

Convert in place to ESRI WKT format

func (SpatialReference) NormalizedProjectionParameter 

func (sr SpatialReference) NormalizedProjectionParameter(
	name string, defaultValue float64,
) (float64, error)

Fetch a normalized projection parameter value

func (SpatialReference) PrimeMeridian 

func (sr SpatialReference) PrimeMeridian() (string, float64)

Fetch prime meridian information

func (SpatialReference) ProjectionParameter 

func (sr SpatialReference) ProjectionParameter(name string, defaultValue float64) (float64, error)

Fetch a projection parameter value

func (SpatialReference) Reference 

func (sr SpatialReference) Reference() int

Increments the reference count by one, returning reference count

func (SpatialReference) Release 

func (sr SpatialReference) Release()

Decrements the reference count by one and destroy if zero

func (SpatialReference) SemiMajorAxis 

func (sr SpatialReference) SemiMajorAxis() (float64, error)

Get spheroid semi-major axis

func (SpatialReference) SemiMinorAxis 

func (sr SpatialReference) SemiMinorAxis() (float64, error)

Get spheroid semi-minor axis

func (SpatialReference) SetACEA 

func (sr SpatialReference) SetACEA(
	stdp1, stdp2, centerLat, centerLong, falseEasting, falseNorthing float64,
) error

Set to Albers Conic Equal Area

func (SpatialReference) SetAE 

func (sr SpatialReference) SetAE(centerLat, centerLong, falseEasting, falseNorthing float64) error

Set to Azimuthal Equidistant

func (SpatialReference) SetAngularUnits 

func (sr SpatialReference) SetAngularUnits(units string, radians float64) error

Set the angular units for the geographic coordinate system

func (SpatialReference) SetAttrValue 

func (sr SpatialReference) SetAttrValue(path, value string) error

Set attribute value in spatial reference

func (SpatialReference) SetAuthority 

func (sr SpatialReference) SetAuthority(target, authority string, code int) error

Sets the authority for a node

func (SpatialReference) SetBonne 

func (sr SpatialReference) SetBonne(standardParallel, centralMeridian, falseEasting, falseNorthing float64) error

Set to Bonne

func (SpatialReference) SetCEA 

func (sr SpatialReference) SetCEA(stdp1, centralMeridian, falseEasting, falseNorthing float64) error

Set to Cylindrical Equal Area

func (SpatialReference) SetCS 

func (sr SpatialReference) SetCS(centerLat, centerLong, falseEasting, falseNorthing float64) error

Set to Cassini-Soldner

func (SpatialReference) SetCompoundCS 

func (sr SpatialReference) SetCompoundCS(
	name string,
	horizontal, vertical SpatialReference,
) error

Setup a compound coordinate system

func (SpatialReference) SetEC 

func (sr SpatialReference) SetEC(
	stdp1, stdp2, centerLat, centerLong, falseEasting, falseNorthing float64,
) error

Set to Equidistant Conic

func (SpatialReference) SetEckert 

func (sr SpatialReference) SetEckert(variation int, centralMeridian, falseEasting, falseNorthing float64) error

Set to Eckert I-VI

func (SpatialReference) SetEquirectangular 

func (sr SpatialReference) SetEquirectangular(
	centerLat, centerLong, falseEasting, falseNorthing float64,
) error

Set to Equirectangular

func (SpatialReference) SetEquirectangularGeneralized 

func (sr SpatialReference) SetEquirectangularGeneralized(
	centerLat, centerLong, psuedoStdParallel, falseEasting, falseNorthing float64,
) error

Set to Equirectangular (generalized form)

func (SpatialReference) SetFromUserInput 

func (sr SpatialReference) SetFromUserInput(name string) error

Set spatial reference from various text formats

func (SpatialReference) SetGEOS 

func (sr SpatialReference) SetGEOS(
	centralMeridian, satelliteHeight, falseEasting, falseNorthing float64,
) error

Set to GEOS - Geostationary Satellite View

func (SpatialReference) SetGH 

func (sr SpatialReference) SetGH(centralMeridian, falseEasting, falseNorthing float64) error

Set to Goode Homolosine

func (SpatialReference) SetGS 

func (sr SpatialReference) SetGS(centralMeridian, falseEasting, falseNorthing float64) error

Set to Gall Stereographic

func (SpatialReference) SetGSTM 

func (sr SpatialReference) SetGSTM(
	centerLat, centerLong, scale, falseEasting, falseNorthing float64,
) error

Set to Gauss Schreiber Transverse Mercator

func (SpatialReference) SetGeocentricCS 

func (sr SpatialReference) SetGeocentricCS(name string) error

Set the user visible geographic CS name

func (SpatialReference) SetGeographicCS 

func (sr SpatialReference) SetGeographicCS(
	geogName, datumName, spheroidName string,
	semiMajor, flattening float64,
	pmName string,
	offset float64,
	angularUnits string,
	toRadians float64,
) error

Set geographic coordinate system

func (SpatialReference) SetGnomonic 

func (sr SpatialReference) SetGnomonic(
	centerLat, centerLong, falseEasting, falseNorthing float64,
) error

Set to gnomonic

func (SpatialReference) SetHOM 

func (sr SpatialReference) SetHOM(
	centerLat, centerLong, azimuth, rectToSkew, scale, falseEasting, falseNorthing float64,
) error

Set to Hotine Oblique Mercator projection using azimuth angle

func (SpatialReference) SetHOM2PNO 

func (sr SpatialReference) SetHOM2PNO(
	centerLat, lat1, long1, lat2, long2, scale, falseEasting, falseNorthing float64,
) error

Set to Hotine Oblique Mercator projection using two points on projection centerline

func (SpatialReference) SetIGH 

func (sr SpatialReference) SetIGH() error

Set to Interrupted Goode Homolosine

func (SpatialReference) SetIWMPolyconic 

func (sr SpatialReference) SetIWMPolyconic(
	lat1, lat2, centerLong, falseEasting, falseNorthing float64,
) error

Set to International Map of the World Polyconic

func (SpatialReference) SetKrovak 

func (sr SpatialReference) SetKrovak(
	centerLat, centerLong, azimuth, psuedoStdParallel, scale, falseEasting, falseNorthing float64,
) error

Set to Krovak Oblique Conic Conformal

func (SpatialReference) SetLAEA 

func (sr SpatialReference) SetLAEA(
	centerLat, centerLong, falseEasting, falseNorthing float64,
) error

Set to Lambert Azimuthal Equal Area

func (SpatialReference) SetLCC 

func (sr SpatialReference) SetLCC(
	stdp1, stdp2, centerLat, centerLong, falseEasting, falseNorthing float64,
) error

Set to Lambert Conformal Conic

func (SpatialReference) SetLCC1SP 

func (sr SpatialReference) SetLCC1SP(
	centerLat, centerLong, scale, falseEasting, falseNorthing float64,
) error

Set to Lambert Conformal Conic (1 standard parallel)

func (SpatialReference) SetLCCB 

func (sr SpatialReference) SetLCCB(
	stdp1, stdp2, centerLat, centerLong, falseEasting, falseNorthing float64,
) error

Set to Lambert Conformal Conic (Belgium)

func (SpatialReference) SetLinearUnits 

func (sr SpatialReference) SetLinearUnits(name string, toMeters float64) error

Set the linear units for the projection

func (SpatialReference) SetLinearUnitsAndUpdateParameters 

func (sr SpatialReference) SetLinearUnitsAndUpdateParameters(name string, toMeters float64) error

Set the linear units for the target node and update all existing linear parameters

func (SpatialReference) SetLocalCS 

func (sr SpatialReference) SetLocalCS(name string) error

Set the user visible local CS name

func (SpatialReference) SetMC 

func (sr SpatialReference) SetMC(
	centerLat, centerLong, falseEasting, falseNorthing float64,
) error

Set to Miller Cylindrical

func (SpatialReference) SetMercator 

func (sr SpatialReference) SetMercator(
	centerLat, centerLong, scale, falseEasting, falseNorthing float64,
) error

Set to Mercator

func (SpatialReference) SetMollweide 

func (sr SpatialReference) SetMollweide(
	centralMeridian, falseEasting, falseNorthing float64,
) error

Set tp Mollweide

func (SpatialReference) SetNZMG 

func (sr SpatialReference) SetNZMG(
	centerLat, centerLong, falseEasting, falseNorthing float64,
) error

Set to New Zealand Map Grid

func (SpatialReference) SetNormalizedProjectionParameter 

func (sr SpatialReference) SetNormalizedProjectionParameter(name string, value float64) error

Set a projection parameter with a normalized value

func (SpatialReference) SetOS 

func (sr SpatialReference) SetOS(
	originLat, meridian, scale, falseEasting, falseNorthing float64,
) error

Set to Oblique Stereographic

func (SpatialReference) SetOrthographic 

func (sr SpatialReference) SetOrthographic(
	centerLat, centerLong, falseEasting, falseNorthing float64,
) error

Set to Orthographic

func (SpatialReference) SetPS 

func (sr SpatialReference) SetPS(
	centerLat, centerLong, scale, falseEasting, falseNorthing float64,
) error

Set to Polar Stereographic

func (SpatialReference) SetPolyconic 

func (sr SpatialReference) SetPolyconic(
	centerLat, centerLong, falseEasting, falseNorthing float64,
) error

Set to Polyconic

func (SpatialReference) SetProjectedCS 

func (sr SpatialReference) SetProjectedCS(name string) error

Set the user visible projected CS name

func (SpatialReference) SetProjectionByName 

func (sr SpatialReference) SetProjectionByName(name string) error

Set a projection by name

func (SpatialReference) SetProjectionParameter 

func (sr SpatialReference) SetProjectionParameter(name string, value float64) error

Set a projection parameter value

func (SpatialReference) SetRobinson 

func (sr SpatialReference) SetRobinson(
	centerLong, falseEasting, falseNorthing float64,
) error

Set to Robinson

func (SpatialReference) SetSOC 

func (sr SpatialReference) SetSOC(
	latitudeOfOrigin, centralMeridian, falseEasting, falseNorthing float64,
) error

Set to Swiss Oblique Cylindrical

func (SpatialReference) SetSinusoidal 

func (sr SpatialReference) SetSinusoidal(
	centerLong, falseEasting, falseNorthing float64,
) error

Set to Sinusoidal

func (SpatialReference) SetStatePlane 

func (sr SpatialReference) SetStatePlane(zone int, nad83 bool) error

Set State Plane projection definition

func (SpatialReference) SetStatePlaneWithUnits 

func (sr SpatialReference) SetStatePlaneWithUnits(
	zone int,
	nad83 bool,
	unitName string,
	factor float64,
) error

Set State Plane projection definition

func (SpatialReference) SetStereographic 

func (sr SpatialReference) SetStereographic(
	centerLat, centerLong, scale, falseEasting, falseNorthing float64,
) error

Set to Stereographic

func (SpatialReference) SetTM 

func (sr SpatialReference) SetTM(
	centerLat, centerLong, scale, falseEasting, falseNorthing float64,
) error

Set to Transverse Mercator

func (SpatialReference) SetTMG 

func (sr SpatialReference) SetTMG(
	centerLat, centerLong, falseEasting, falseNorthing float64,
) error

Set to Tunisia Mining Grid

func (SpatialReference) SetTMSO 

func (sr SpatialReference) SetTMSO(
	centerLat, centerLong, scale, falseEasting, falseNorthing float64,
) error

Set to Transverse Mercator (South Oriented)

func (SpatialReference) SetTMVariant 

func (sr SpatialReference) SetTMVariant(
	variantName string, centerLat, centerLong, scale, falseEasting, falseNorthing float64,
) error

Set to Transverse Mercator variant

func (SpatialReference) SetTOWGS84 

func (sr SpatialReference) SetTOWGS84(dx, dy, dz, ex, ey, ez, ppm float64) error

Set the Bursa-Wolf conversion to WGS84

func (SpatialReference) SetTargetLinearUnits 

func (sr SpatialReference) SetTargetLinearUnits(target, units string, toMeters float64) error

Set the linear units for the target node

func (SpatialReference) SetUTM 

func (sr SpatialReference) SetUTM(zone int, north bool) error

Set UTM projection definition

func (SpatialReference) SetVDG 

func (sr SpatialReference) SetVDG(
	centerLong, falseEasting, falseNorthing float64,
) error

Set to VanDerGrinten

func (SpatialReference) SetVerticalCS 

func (sr SpatialReference) SetVerticalCS(csName, datumName string, datumType int) error

Set up the vertical coordinate system

func (SpatialReference) SetWellKnownGeographicCS 

func (sr SpatialReference) SetWellKnownGeographicCS(name string) error

Set geographic CS based on well known name

func (SpatialReference) StripCTParams 

func (sr SpatialReference) StripCTParams() error

Strip OGC CT parameters

func (SpatialReference) TOWGS84 

func (sr SpatialReference) TOWGS84() (coeff [7]float64, err error)

Fetch the TOWGS84 parameters if available

func (SpatialReference) TargetLinearUnits 

func (sr SpatialReference) TargetLinearUnits(target string) (string, float64)

Fetch linear units for target

func (SpatialReference) ToMICoordSys 

func (sr SpatialReference) ToMICoordSys() (output string, errVal error)

Export coordinate system in Mapinfo style CoordSys format

func (SpatialReference) ToPCI 

func (sr SpatialReference) ToPCI() (proj, units string, params []float64, errVal error)

Export coordinate system in PCI format

func (SpatialReference) ToPrettyWKT 

func (sr SpatialReference) ToPrettyWKT(simplify bool) (string, error)

Export coordinate system to a nicely formatted WKT string

func (SpatialReference) ToProj4 

func (sr SpatialReference) ToProj4() (string, error)

Export coordinate system in PROJ.4 format

func (SpatialReference) ToUSGS 

func (sr SpatialReference) ToUSGS() (proj, zone int, params []float64, datum int, errVal error)

Export coordinate system to USGS GCTP projection definition

func (SpatialReference) ToWKT 

func (sr SpatialReference) ToWKT() (string, error)

Export coordinate system to WKT

func (SpatialReference) ToXML 

func (sr SpatialReference) ToXML() (xml string, errVal error)

Export coordinate system in XML format

func (SpatialReference) UTMZone 

func (sr SpatialReference) UTMZone() (zone int, north bool)

Get UTM zone information

func (SpatialReference) Validate 

func (sr SpatialReference) Validate() error

Validate spatial reference tokens

type StyleMgr 

type StyleMgr struct {
	// contains filtered or unexported fields
}

type StyleTable 

type StyleTable struct {
	// contains filtered or unexported fields
}

type StyleTool 

type StyleTool struct {
	// contains filtered or unexported fields
}

type VSILFILE 

type VSILFILE struct {
	// contains filtered or unexported fields
}

func VSIFOpenL 

func VSIFOpenL(fileName string, fileAccess string) (VSILFILE, error)

Open file.

Source Files

View all Source files

Directories

Path Synopsis
examples
test_tiff
test_translate
test_warp

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