space

package
v1.1.3 Latest Latest
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 Go to latest Published: Aug 30, 2022 License: LGPL-2.1 Imports: 12 Imported by: 2

Documentation

Overview

Package space A representation of a linear vector geometry. include point line ring polygon multipoint multiline multrpolygon collection bound.

Index

Constants

View Source 
const (
	BJ54 = iota + 1000000
	XA80
	CGCS2000

	// WGS84 World Geodetic System一1984 Coordinate System
	WGS84 = 4326

	// PseudoMercator  WGS 84 / Pseudo-Mercator
	PseudoMercator = 3857

	//GCJ02 Guojia cehui ju 02 ,unit degree
	GCJ02 = 104326

	//GCJ02Web Guojia cehui ju 02 Mercator, unit m
	GCJ02Web = 103857

	// BD09 Guojia cehui ju 02+BD ,unit degree
	BD09 = 114326

	// BD09Web Guojia cehui ju 02+BD, unit m
	BD09Web = 113857
)

const Coordinate System

View Source 
const (
	TypePoint      = "Point"
	TypeMultiPoint = "MultiPoint"

	TypeLineString      = "LineString"
	TypeMultiLineString = "MultiLineString"

	TypePolygon      = "Polygon"
	TypeMultiPolygon = "MultiPolygon"

	TypeCollection = "GeometryCollection"

	TypeBound = "Bound"

	TypeCircle = "Polygon"
)

const geomtype

Variables

This section is empty.

Functions

func Distance 

func Distance(from, to Geometry, f measure.Distance) (float64, error)

Distance returns distance Between the two Geometry.

Types

type Bound 

type Bound struct {
	Min, Max Point
}

A Bound represents a closed box or rectangle. To create a bound with two points you can do something like: MultiPoint{p1, p2}.Bound()

func (Bound) Area 

func (b Bound) Area() (float64, error)

Area returns the area of a polygonal geometry. The area of a bound is 0.

func (Bound) Bottom 

func (b Bound) Bottom() float64

Bottom returns the bottom of the bound.

func (Bound) Bound 

func (b Bound) Bound() Bound

Bound returns the the same bound.

func (Bound) Boundary 

func (b Bound) Boundary() (Geometry, error)

Boundary returns the closure of the combinatorial boundary of this space.Geometry.

func (Bound) Buffer 

func (b Bound) Buffer(width float64, quadsegs int) Geometry

Buffer Returns a geometry that represents all points whose distance from this space.Geometry is less than or equal to distance.

func (Bound) BufferInMeter added in v1.0.2 

func (b Bound) BufferInMeter(width float64, quadsegs int) Geometry

BufferInMeter Returns a geometry that represents all points whose distance from this space.Geometry is less than or equal to distance.

func (Bound) Centroid 

func (b Bound) Centroid() Point

Centroid Computes the centroid point of a geometry.

func (Bound) Contains 

func (b Bound) Contains(point Point) bool

Contains determines if the point is within the bound. Points on the boundary are considered within.

func (Bound) ContainsBound 

func (b Bound) ContainsBound(bound Bound) bool

ContainsBound determines if the bound is within the bound.

func (Bound) ConvexHull 

func (b Bound) ConvexHull() Geometry

ConvexHull computes the convex hull of a geometry. The convex hull is the smallest convex geometry that encloses all geometries in the input. In the general case the convex hull is a Polygon. The convex hull of two or more collinear points is a two-point LineString. The convex hull of one or more identical points is a Point.

func (Bound) CoordinateSystem added in v1.0.1 

func (b Bound) CoordinateSystem() int

CoordinateSystem return Coordinate System.

func (Bound) Dimensions 

func (b Bound) Dimensions() int

Dimensions returns 2 because a Bound is a 2d object.

func (Bound) Distance 

func (b Bound) Distance(g Geometry) (float64, error)

Distance returns distance Between the two Geometry.

func (Bound) Envelope 

func (b Bound) Envelope() Geometry

Envelope returns the minimum bounding box for the supplied geometry, as a geometry. The polygon is defined by the corner points of the bounding box ((MINX, MINY), (MINX, MAXY), (MAXX, MAXY), (MAXX, MINY), (MINX, MINY)).

func (Bound) Equals 

func (b Bound) Equals(g Geometry) bool

Equals checks if the Bound represents the same Geometry or vector.

func (Bound) EqualsBound 

func (b Bound) EqualsBound(c Bound) bool

EqualsBound returns if two bounds are equal.

func (Bound) EqualsExact 

func (b Bound) EqualsExact(g Geometry, tolerance float64) bool

EqualsExact Returns true if the two Geometries are exactly equal, up to a specified distance tolerance. Two Geometries are exactly equal within a distance tolerance

func (Bound) Extend 

func (b Bound) Extend(point Point) Bound

Extend grows the bound to include the new point.

func (Bound) Filter added in v1.0.2 

func (b Bound) Filter(f matrix.Filter) Geometry

Filter Performs an operation with the provided .

func (Bound) GeoJSONType 

func (b Bound) GeoJSONType() string

GeoJSONType returns the GeoJSON type for the object.

func (Bound) Geom added in v1.1.0 

func (b Bound) Geom() Geometry

Geom return Geometry without Coordinate System.

func (Bound) IntersectsBound 

func (b Bound) IntersectsBound(other Bound) bool

IntersectsBound Tests if the region defined by other intersects the region of this Envelope.

func (Bound) IsClosed 

func (b Bound) IsClosed() bool

IsClosed Returns TRUE if the LINESTRING's start and end points are coincident. For Polyhedral Surfaces, reports if the surface is areal (open) or IsC (closed).

func (Bound) IsCollection 

func (b Bound) IsCollection() bool

IsCollection returns true if the Geometry is collection.

func (Bound) IsCorrect added in v1.1.2 

func (b Bound) IsCorrect() bool

IsCorrect returns true if the geometry struct is Correct.

func (Bound) IsEmpty 

func (b Bound) IsEmpty() bool

IsEmpty returns true if it contains zero area or if it's in some malformed negative state where the left point is larger than the right. This can be caused by padding too much negative.

func (Bound) IsRing 

func (b Bound) IsRing() bool

IsRing returns true if the lineal geometry has the ring property.

func (Bound) IsSimple 

func (b Bound) IsSimple() bool

IsSimple returns true if this space.Geometry has no anomalous geometric points, such as self intersection or self tangency.

func (Bound) IsValid 

func (b Bound) IsValid() bool

IsValid returns true if the geometry is valid.

func (Bound) Left 

func (b Bound) Left() float64

Left returns the left of the bound.

func (Bound) LeftTop 

func (b Bound) LeftTop() Point

LeftTop returns the upper left point of the bound.

func (Bound) Length 

func (b Bound) Length() float64

Length Returns the length of this LineString

func (Bound) Nums 

func (b Bound) Nums() int

Nums ...

func (Bound) PointOnSurface 

func (b Bound) PointOnSurface() Geometry

PointOnSurface Returns a POINT guaranteed to intersect a surface.

func (Bound) Right 

func (b Bound) Right() float64

Right returns the right of the bound.

func (Bound) RightBottom 

func (b Bound) RightBottom() Point

RightBottom return the lower right point of the bound.

func (Bound) Simplify 

func (b Bound) Simplify(tolerance float64) Geometry

Simplify returns a "simplified" version of the given geometry using the Douglas-Peucker algorithm, May not preserve topology

func (Bound) SimplifyP 

func (b Bound) SimplifyP(tolerance float64) Geometry

SimplifyP returns a geometry simplified by amount given by tolerance. Unlike Simplify, SimplifyP guarantees it will preserve topology.

func (Bound) SpheroidDistance 

func (b Bound) SpheroidDistance(g Geometry) (float64, error)

SpheroidDistance returns spheroid distance Between the two Geometry.

func (Bound) ToMatrix 

func (b Bound) ToMatrix() matrix.Steric

ToMatrix returns the Steric of a geometry.

func (Bound) ToPolygon 

func (b Bound) ToPolygon() Polygon

ToPolygon converts the bound into a Polygon object.

func (Bound) ToRing 

func (b Bound) ToRing() Ring

ToRing converts the bound into a loop defined by the boundary of the box.

func (Bound) Top 

func (b Bound) Top() float64

Top returns the top of the bound.

func (Bound) Union 

func (b Bound) Union(other Bound) Bound

Union extends this bound to contain the union of this and the given bound.

func (Bound) UniquePoints 

func (b Bound) UniquePoints() MultiPoint

UniquePoints return all distinct vertices of input geometry as a MultiPoint.

type Circle added in v1.0.2 

type Circle struct {
	Polygon
	Centre   Point
	Radius   float64
	Segments int
}

Circle describes a circle Valid

func CreateCircle added in v1.0.2 

func CreateCircle(centre Point, radius float64) (*Circle, error)

CreateCircle Returns valid circle.

func CreateCircleWithSegments added in v1.0.2 

func CreateCircleWithSegments(centre Point, radius float64, segments int) (*Circle, error)

CreateCircleWithSegments Returns valid circle.

func (*Circle) Area added in v1.0.2 

func (c *Circle) Area() (float64, error)

Area returns the area of a circle geometry.

func (*Circle) Bound added in v1.0.2 

func (c *Circle) Bound() Bound

Bound returns a rect around the circle. Uses rectangular coordinates.

func (*Circle) Buffer added in v1.0.2 

func (c *Circle) Buffer(width float64, quadsegs int) Geometry

Buffer sReturns a geometry that represents all points whose distance from this space.Geometry is less than or equal to distance.

func (*Circle) Centroid added in v1.0.2 

func (c *Circle) Centroid() Point

Centroid Computes the centroid point of a geometry.

func (*Circle) Envelope added in v1.0.2 

func (c *Circle) Envelope() Geometry

Envelope returns the minimum bounding box for the supplied geometry, as a geometry. The polygon is defined by the corner points of the bounding box ((MINX, MINY), (MINX, MAXY), (MAXX, MAXY), (MAXX, MINY), (MINX, MINY)).

func (*Circle) Equals added in v1.0.2 

func (c *Circle) Equals(g Geometry) bool

Equals checks if the Circle represents the same Geometry or vector.

func (*Circle) EqualsCircle added in v1.0.2 

func (c *Circle) EqualsCircle(circle *Circle) bool

EqualsCircle compares two circles.

func (*Circle) EqualsExact added in v1.0.2 

func (c *Circle) EqualsExact(g Geometry, tolerance float64) bool

EqualsExact Returns true if the two Geometries are exactly equal, up to a specified distance tolerance. Two Geometries are exactly equal within a distance tolerance

func (*Circle) GeoJSONType added in v1.0.2 

func (c *Circle) GeoJSONType() string

GeoJSONType returns the GeoJSON type for the circle.

func (*Circle) Geom added in v1.1.0 

func (c *Circle) Geom() Geometry

Geom return Geometry without Coordinate System.

func (*Circle) IsClosed added in v1.0.2 

func (c *Circle) IsClosed() bool

IsClosed Returns TRUE if the LINESTRING's start and end points are coincident. For Polyhedral Surfaces, reports if the surface is areal (open) or IsC (closed).

func (*Circle) IsRing added in v1.0.2 

func (c *Circle) IsRing() bool

IsRing returns true if the lineal geometry has the circle property.

func (*Circle) IsSimple added in v1.0.2 

func (c *Circle) IsSimple() bool

IsSimple returns true if this space.Geometry has no anomalous geometric points, such as self intersection or self tangency.

func (*Circle) IsValid added in v1.0.2 

func (c *Circle) IsValid() bool

IsValid returns true if the geometry is valid.

func (*Circle) Length added in v1.0.2 

func (c *Circle) Length() float64

Length Returns the length of this circle

type Collection 

type Collection []Geometry

A Collection is a collection of geometries that is also a Geometry.

func (Collection) Area 

func (c Collection) Area() (float64, error)

Area returns the area of a Collection geometry.

func (Collection) Bound 

func (c Collection) Bound() Bound

Bound returns the bounding box of all the Geometries combined.

func (Collection) Boundary 

func (c Collection) Boundary() (Geometry, error)

Boundary returns the closure of the combinatorial boundary of this space.Geometry.

func (Collection) Buffer 

func (c Collection) Buffer(width float64, quadsegs int) Geometry

Buffer Returns a geometry that represents all points whose distance from this space.Geometry is less than or equal to distance.

func (Collection) BufferInMeter added in v1.0.2 

func (c Collection) BufferInMeter(width float64, quadsegs int) Geometry

BufferInMeter Returns a geometry that represents all points whose distance from this space.Geometry is less than or equal to distance.

func (Collection) Centroid 

func (c Collection) Centroid() Point

Centroid Computes the centroid point of a geometry.

func (Collection) ConvexHull 

func (c Collection) ConvexHull() Geometry

ConvexHull computes the convex hull of a geometry. The convex hull is the smallest convex geometry that encloses all geometries in the input. In the general case the convex hull is a Polygon. The convex hull of two or more collinear points is a two-point LineString. The convex hull of one or more identical points is a Point.

func (Collection) CoordinateSystem added in v1.0.1 

func (c Collection) CoordinateSystem() int

CoordinateSystem return Coordinate System.

func (Collection) Dimensions 

func (c Collection) Dimensions() int

Dimensions returns the max of the dimensions of the collection.

func (Collection) Distance 

func (c Collection) Distance(g Geometry) (float64, error)

Distance returns distance Between the two Geometry.

func (Collection) Envelope 

func (c Collection) Envelope() Geometry

Envelope returns the minimum bounding box for the supplied geometry, as a geometry. The polygon is defined by the corner points of the bounding box ((MINX, MINY), (MINX, MAXY), (MAXX, MAXY), (MAXX, MINY), (MINX, MINY)).

func (Collection) Equals 

func (c Collection) Equals(g Geometry) bool

Equals checks if the Collection represents the same Geometry or vector.

func (Collection) EqualsCollection 

func (c Collection) EqualsCollection(collection Collection) bool

EqualsCollection compares two collections. Returns true if lengths are the same and all the sub geometries are the same and in the same order.

func (Collection) EqualsExact 

func (c Collection) EqualsExact(g Geometry, tolerance float64) bool

EqualsExact Returns true if the two Geometries are exactly equal, up to a specified distance tolerance. Two Geometries are exactly equal within a distance tolerance

func (Collection) Filter added in v1.0.2 

func (c Collection) Filter(f matrix.Filter) Geometry

Filter Performs an operation with the provided .

func (Collection) GeoJSONType 

func (c Collection) GeoJSONType() string

GeoJSONType returns the geometry collection type.

func (Collection) Geom added in v1.1.0 

func (c Collection) Geom() Geometry

Geom return Geometry without Coordinate System.

func (Collection) IsClosed 

func (c Collection) IsClosed() bool

IsClosed Returns TRUE if the LINESTRING's start and end points are coincident. For Polyhedral Surfaces, reports if the surface is areal (open) or IsC (closed).

func (Collection) IsCollection 

func (c Collection) IsCollection() bool

IsCollection returns true if the Geometry is collection.

func (Collection) IsCorrect added in v1.1.2 

func (c Collection) IsCorrect() bool

IsCorrect returns true if the geometry struct is Correct.

func (Collection) IsEmpty 

func (c Collection) IsEmpty() bool

IsEmpty returns true if the Geometry is empty.

func (Collection) IsRing 

func (c Collection) IsRing() bool

IsRing returns true if the lineal geometry has the ring property.

func (Collection) IsSimple 

func (c Collection) IsSimple() bool

IsSimple returns true if this space.Geometry has no anomalous geometric points, such as self intersection or self tangency.

func (Collection) IsValid 

func (c Collection) IsValid() bool

IsValid returns true if the geometry is valid.

func (Collection) Length 

func (c Collection) Length() float64

Length Returns the length of this Collection

func (Collection) Nums 

func (c Collection) Nums() int

Nums ...

func (Collection) PointOnSurface 

func (c Collection) PointOnSurface() Geometry

PointOnSurface Returns a POINT guaranteed to intersect a surface.

func (Collection) Simplify 

func (c Collection) Simplify(tolerance float64) Geometry

Simplify returns a "simplified" version of the given geometry using the Douglas-Peucker algorithm, May not preserve topology

func (Collection) SimplifyP 

func (c Collection) SimplifyP(tolerance float64) Geometry

SimplifyP returns a geometry simplified by amount given by tolerance. Unlike Simplify, SimplifyP guarantees it will preserve topology.

func (Collection) SpheroidDistance 

func (c Collection) SpheroidDistance(g Geometry) (float64, error)

SpheroidDistance returns spheroid distance Between the two Geometry.

func (Collection) ToMatrix 

func (c Collection) ToMatrix() matrix.Steric

ToMatrix returns the Steric of a geometry.

func (Collection) UniquePoints 

func (c Collection) UniquePoints() MultiPoint

UniquePoints return all distinct vertices of input geometry as a MultiPoint.

type Coordinate 

type Coordinate struct {
	X float64
	Y float64
	Z float64
}

Coordinate coord

func (Coordinate) String 

func (c Coordinate) String() string

type Geometry 

type Geometry interface {

	// CoordinateSystem return Coordinate System.
	CoordinateSystem() int

	// Geom return Geometry without Coordinate System.
	Geom() Geometry

	GeoJSONType() string
	// e.g. 0d, 1d, 2d
	Dimensions() int

	Bound() Bound

	// Num of geometries
	Nums() int

	// IsCollection returns true if the Geometry is  collection.
	IsCollection() bool

	// ToMatrix returns the Steric of a  geometry.
	ToMatrix() matrix.Steric

	// Area returns the area of a polygonal geometry.
	Area() (float64, error)

	// Boundary returns the closure of the combinatorial boundary of this space.Geometry.
	Boundary() (Geometry, error)

	// Buffer Returns a geometry that represents all points whose distance
	// from this space.Geometry is less than or equal to distance.
	Buffer(width float64, quadsegs int) Geometry

	// BufferInMeter Returns a geometry that represents all points whose distance
	// from this space.Geometry is less than or equal to distance.
	BufferInMeter(width float64, quadsegs int) Geometry

	// Centroid Computes the centroid point of a geometry.
	Centroid() Point

	// ConvexHull computes the convex hull of a geometry. The convex hull is the smallest convex geometry
	// that encloses all geometries in the input.
	// In the general case the convex hull is a Polygon.
	// The convex hull of two or more collinear points is a two-point LineString.
	// The convex hull of one or more identical points is a Point.
	ConvexHull() Geometry

	// Distance returns distance Between the two Geometry.
	Distance(g Geometry) (float64, error)

	// Envelope returns the  minimum bounding box for the supplied geometry, as a geometry.
	// The polygon is defined by the corner points of the bounding box
	// ((MINX, MINY), (MINX, MAXY), (MAXX, MAXY), (MAXX, MINY), (MINX, MINY)).
	Envelope() Geometry

	// Equals returns true if the Geometry represents the same Geometry or vector.
	Equals(g Geometry) bool

	// EqualsExact Returns true if the two Geometries are exactly equal,
	// up to a specified distance tolerance.
	// Two Geometries are exactly equal within a distance tolerance
	EqualsExact(g Geometry, tolerance float64) bool

	// IsClosed Returns TRUE if the LINESTRING's start and end points are coincident.
	// For Polyhedral Surfaces, reports if the surface is areal (open) or IsC (closed).
	IsClosed() bool

	// IsEmpty returns true if the Geometry is empty.
	IsEmpty() bool

	// IsRing returns true if the lineal geometry has the ring property.
	IsRing() bool

	// IsSimple returns true if this space.Geometry has no anomalous geometric points,
	// such as self intersection or self tangency.
	IsSimple() bool

	// IsValid returns true if the  geometry is valid.
	IsValid() bool

	// IsCorrect returns true if the geometry struct is Correct.
	IsCorrect() bool

	// Length Returns the length of this geometry
	Length() float64

	// PointOnSurface Returns a POINT guaranteed to intersect a surface.
	PointOnSurface() Geometry

	// UniquePoints return all distinct vertices of input geometry as a MultiPoint.
	UniquePoints() MultiPoint

	// Simplify returns a "simplified" version of the given geometry using the Douglas-Peucker algorithm,
	// May not preserve topology
	Simplify(tolerance float64) Geometry

	// SimplifyP returns a geometry simplified by amount given by tolerance.
	// Unlike Simplify, SimplifyP guarantees it will preserve topology.
	SimplifyP(tolerance float64) Geometry

	// SpheroidDistance returns  spheroid distance Between the two Geometry.
	SpheroidDistance(g Geometry) (float64, error)

	// Filter Performs an operation with the provided .
	Filter(f matrix.Filter) Geometry
}

Geometry is the interface implemented by other spatial objects

func BufferInMeter added in v1.0.2 

func BufferInMeter(geometry Geometry, width float64, quadsegs int) Geometry

BufferInMeter ...

func TransGeometry 

func TransGeometry(inputGeom matrix.Steric) Geometry

TransGeometry trans steric to geometry.

type GeometryValid added in v1.0.1 

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

GeometryValid describes a geographic Element Valid

func CreateElementValid 

func CreateElementValid(geom Geometry) (*GeometryValid, error)

CreateElementValid Returns valid geom element. returns nil if geom is invalid.

func CreateElementValidWithCoordSys 

func CreateElementValidWithCoordSys(geom Geometry, coordSys int) (*GeometryValid, error)

CreateElementValidWithCoordSys Returns valid geom element. returns nil if geom is invalid.

func (*GeometryValid) CoordinateSystem added in v1.0.1 

func (g *GeometryValid) CoordinateSystem() int

CoordinateSystem return Coordinate System.

func (*GeometryValid) Geom added in v1.1.0 

func (g *GeometryValid) Geom() Geometry

Geom return Geometry without Coordinate System.

func (*GeometryValid) IsProjection added in v1.0.2 

func (g *GeometryValid) IsProjection() bool

IsProjection returns true if the coordinateSystem is projection.

type Line 

type Line struct {
	Start, End Point
}

Line straight line .

type LineString 

type LineString matrix.LineMatrix

LineString represents a set of points to be thought of as a polyline.

func (LineString) Area 

func (ls LineString) Area() (float64, error)

Area returns the area of a polygonal geometry. The area of a LineString is 0.

func (LineString) Bound 

func (ls LineString) Bound() Bound

Bound returns a rect around the line string. Uses rectangular coordinates.

func (LineString) Boundary 

func (ls LineString) Boundary() (Geometry, error)

Boundary returns the closure of the combinatorial boundary of this space.Geometry. The boundary of a lineal geometry is always a zero-dimensional geometry (which may be empty).

func (LineString) Buffer 

func (ls LineString) Buffer(width float64, quadsegs int) Geometry

Buffer Returns a geometry that represents all points whose distance from this space.Geometry is less than or equal to distance.

func (LineString) BufferInMeter added in v1.0.2 

func (ls LineString) BufferInMeter(width float64, quadsegs int) Geometry

BufferInMeter Returns a geometry that represents all points whose distance from this space.Geometry is less than or equal to distance.

func (LineString) Centroid 

func (ls LineString) Centroid() Point

Centroid Computes the centroid point of a geometry.

func (LineString) ConvexHull 

func (ls LineString) ConvexHull() Geometry

ConvexHull computes the convex hull of a geometry. The convex hull is the smallest convex geometry that encloses all geometries in the input. In the general case the convex hull is a Polygon. The convex hull of two or more collinear points is a two-point LineString. The convex hull of one or more identical points is a Point.

func (LineString) CoordinateSystem added in v1.0.1 

func (ls LineString) CoordinateSystem() int

CoordinateSystem return Coordinate System.

func (LineString) Dimensions 

func (ls LineString) Dimensions() int

Dimensions returns 1 because a LineString is a 1d object.

func (LineString) Distance 

func (ls LineString) Distance(g Geometry) (float64, error)

Distance returns distance Between the two Geometry.

func (LineString) Envelope 

func (ls LineString) Envelope() Geometry

Envelope returns the minimum bounding box for the supplied geometry, as a geometry. The polygon is defined by the corner points of the bounding box ((MINX, MINY), (MINX, MAXY), (MAXX, MAXY), (MAXX, MINY), (MINX, MINY)).

func (LineString) Equals 

func (ls LineString) Equals(g Geometry) bool

Equals checks if the LineString represents the same Geometry or vector.

func (LineString) EqualsExact 

func (ls LineString) EqualsExact(g Geometry, tolerance float64) bool

EqualsExact Returns true if the two Geometries are exactly equal, up to a specified distance tolerance. Two Geometries are exactly equal within a distance tolerance

func (LineString) EqualsLineString added in v1.0.2 

func (ls LineString) EqualsLineString(lineString LineString) bool

EqualsLineString compares two line strings. Returns true if lengths are the same and all points are Equal.

func (LineString) Filter added in v1.0.2 

func (ls LineString) Filter(f matrix.Filter) Geometry

Filter Performs an operation with the provided .

func (LineString) GeoJSONType 

func (ls LineString) GeoJSONType() string

GeoJSONType returns the GeoJSON type for the linestring.

func (LineString) Geom added in v1.1.0 

func (ls LineString) Geom() Geometry

Geom return Geometry without Coordinate System.

func (LineString) IsClosed 

func (ls LineString) IsClosed() bool

IsClosed Returns TRUE if the LINESTRING's start and end points are coincident. For Polyhedral Surfaces, reports if the surface is areal (open) or IsC (closed).

func (LineString) IsCollection 

func (ls LineString) IsCollection() bool

IsCollection returns true if the Geometry is collection.

func (LineString) IsCorrect added in v1.1.2 

func (ls LineString) IsCorrect() bool

IsCorrect returns true if the geometry struct is Correct.

func (LineString) IsEmpty 

func (ls LineString) IsEmpty() bool

IsEmpty returns true if the Geometry is empty.

func (LineString) IsRing 

func (ls LineString) IsRing() bool

IsRing returns true if the lineal geometry has the ring property.

func (LineString) IsSimple 

func (ls LineString) IsSimple() bool

IsSimple returns true if this space.Geometry has no anomalous geometric points, such as self intersection or self tangency.

func (LineString) IsValid 

func (ls LineString) IsValid() bool

IsValid returns true if the geometry is valid.

func (LineString) Length 

func (ls LineString) Length() float64

Length Returns the length of this LineString

func (LineString) Nums 

func (ls LineString) Nums() int

Nums num of linestrings

func (LineString) PointOnSurface 

func (ls LineString) PointOnSurface() Geometry

PointOnSurface Returns a POINT guaranteed to intersect a surface.

func (LineString) Simplify 

func (ls LineString) Simplify(tolerance float64) Geometry

Simplify returns a "simplified" version of the given geometry using the Douglas-Peucker algorithm, May not preserve topology

func (LineString) SimplifyP 

func (ls LineString) SimplifyP(tolerance float64) Geometry

SimplifyP returns a geometry simplified by amount given by tolerance. Unlike Simplify, SimplifyP guarantees it will preserve topology.

func (LineString) SpheroidDistance 

func (ls LineString) SpheroidDistance(g Geometry) (float64, error)

SpheroidDistance returns spheroid distance Between the two Geometry.

func (LineString) ToLineArray 

func (ls LineString) ToLineArray() (lines []Line)

ToLineArray returns the LineArray

func (LineString) ToMatrix 

func (ls LineString) ToMatrix() matrix.Steric

ToMatrix returns the LineMatrix of a Ring geometry.

func (LineString) ToPointArray 

func (ls LineString) ToPointArray() (la []Point)

ToPointArray returns the PointArray

func (LineString) UniquePoints 

func (ls LineString) UniquePoints() MultiPoint

UniquePoints return all distinct vertices of input geometry as a MultiPoint.

type MultiLineString 

type MultiLineString []LineString

MultiLineString is a set of polylines.

func (MultiLineString) Area 

func (mls MultiLineString) Area() (float64, error)

Area returns the area of a polygonal geometry. The area of a MultiLineString is 0.

func (MultiLineString) Bound 

func (mls MultiLineString) Bound() Bound

Bound returns a bound around all the line strings.

func (MultiLineString) Boundary 

func (mls MultiLineString) Boundary() (Geometry, error)

Boundary returns the closure of the combinatorial boundary of this space.Geometry.

func (MultiLineString) Buffer 

func (mls MultiLineString) Buffer(width float64, quadsegs int) Geometry

Buffer Returns a geometry that represents all points whose distance from this space.Geometry is less than or equal to distance.

func (MultiLineString) BufferInMeter added in v1.0.2 

func (mls MultiLineString) BufferInMeter(width float64, quadsegs int) Geometry

BufferInMeter Returns a geometry that represents all points whose distance from this space.Geometry is less than or equal to distance.

func (MultiLineString) Centroid 

func (mls MultiLineString) Centroid() Point

Centroid Computes the centroid point of a geometry.

func (MultiLineString) ConvexHull 

func (mls MultiLineString) ConvexHull() Geometry

ConvexHull computes the convex hull of a geometry. The convex hull is the smallest convex geometry that encloses all geometries in the input. In the general case the convex hull is a Polygon. The convex hull of two or more collinear points is a two-point LineString. The convex hull of one or more identical points is a Point.

func (MultiLineString) CoordinateSystem added in v1.0.1 

func (mls MultiLineString) CoordinateSystem() int

CoordinateSystem return Coordinate System.

func (MultiLineString) Dimensions 

func (mls MultiLineString) Dimensions() int

Dimensions returns 1 because a MultiLineString is a 2d object.

func (MultiLineString) Distance 

func (mls MultiLineString) Distance(g Geometry) (float64, error)

Distance returns distance Between the two Geometry.

func (MultiLineString) Envelope 

func (mls MultiLineString) Envelope() Geometry

Envelope returns the minimum bounding box for the supplied geometry, as a geometry. The polygon is defined by the corner points of the bounding box ((MINX, MINY), (MINX, MAXY), (MAXX, MAXY), (MAXX, MINY), (MINX, MINY)).

func (MultiLineString) Equals 

func (mls MultiLineString) Equals(g Geometry) bool

Equals checks if the MultiLineString represents the same Geometry or vector.

func (MultiLineString) EqualsExact 

func (mls MultiLineString) EqualsExact(g Geometry, tolerance float64) bool

EqualsExact Returns true if the two Geometries are exactly equal, up to a specified distance tolerance. Two Geometries are exactly equal within a distance tolerance

func (MultiLineString) EqualsMultiLineString 

func (mls MultiLineString) EqualsMultiLineString(multiLineString MultiLineString) bool

EqualsMultiLineString compares two multi line strings. Returns true if lengths are the same and all points are Equal.

func (MultiLineString) Filter added in v1.0.2 

func (mls MultiLineString) Filter(f matrix.Filter) Geometry

Filter Performs an operation with the provided .

func (MultiLineString) GeoJSONType 

func (mls MultiLineString) GeoJSONType() string

GeoJSONType returns the GeoJSON type for the object.

func (MultiLineString) Geom added in v1.1.0 

func (mls MultiLineString) Geom() Geometry

Geom return Geometry without Coordinate System.

func (MultiLineString) IsClosed 

func (mls MultiLineString) IsClosed() bool

IsClosed Returns TRUE if the LINESTRING's start and end points are coincident. For Polyhedral Surfaces, reports if the surface is areal (open) or IsC (closed).

func (MultiLineString) IsCollection 

func (mls MultiLineString) IsCollection() bool

IsCollection returns true if the Geometry is collection.

func (MultiLineString) IsCorrect added in v1.1.2 

func (mls MultiLineString) IsCorrect() bool

IsCorrect returns true if the geometry struct is Correct.

func (MultiLineString) IsEmpty 

func (mls MultiLineString) IsEmpty() bool

IsEmpty returns true if the Geometry is empty.

func (MultiLineString) IsRing 

func (mls MultiLineString) IsRing() bool

IsRing returns true if the lineal geometry has the ring property.

func (MultiLineString) IsSimple 

func (mls MultiLineString) IsSimple() bool

IsSimple returns true if this space.Geometry has no anomalous geometric points, such as self intersection or self tangency.

func (MultiLineString) IsValid 

func (mls MultiLineString) IsValid() bool

IsValid returns true if the geometry is valid.

func (MultiLineString) Length 

func (mls MultiLineString) Length() float64

Length Returns the length of this MultiLineString

func (MultiLineString) Nums 

func (mls MultiLineString) Nums() int

Nums num of multiLinstrings

func (MultiLineString) PointOnSurface 

func (mls MultiLineString) PointOnSurface() Geometry

PointOnSurface Returns a POINT guaranteed to intersect a surface.

func (MultiLineString) Simplify 

func (mls MultiLineString) Simplify(tolerance float64) Geometry

Simplify returns a "simplified" version of the given geometry using the Douglas-Peucker algorithm, May not preserve topology

func (MultiLineString) SimplifyP 

func (mls MultiLineString) SimplifyP(tolerance float64) Geometry

SimplifyP returns a geometry simplified by amount given by tolerance. Unlike Simplify, SimplifyP guarantees it will preserve topology.

func (MultiLineString) SpheroidDistance 

func (mls MultiLineString) SpheroidDistance(g Geometry) (float64, error)

SpheroidDistance returns spheroid distance Between the two Geometry.

func (MultiLineString) ToMatrix 

func (mls MultiLineString) ToMatrix() matrix.Steric

ToMatrix returns the Steric of a geometry.

func (MultiLineString) UniquePoints 

func (mls MultiLineString) UniquePoints() MultiPoint

UniquePoints return all distinct vertices of input geometry as a MultiPoint.

type MultiPoint 

type MultiPoint []Point

A MultiPoint represents a set of points .

func (MultiPoint) Area 

func (mp MultiPoint) Area() (float64, error)

Area returns the area of a polygonal geometry. The area of a multipoint is 0.

func (MultiPoint) Bound 

func (mp MultiPoint) Bound() Bound

Bound returns a bound around the points. Uses rectangular coordinates.

func (MultiPoint) Boundary 

func (mp MultiPoint) Boundary() (Geometry, error)

Boundary returns the closure of the combinatorial boundary of this space.Geometry.

func (MultiPoint) Buffer 

func (mp MultiPoint) Buffer(width float64, quadsegs int) Geometry

Buffer Returns a geometry that represents all points whose distance from this space.Geometry is less than or equal to distance.

func (MultiPoint) BufferInMeter added in v1.0.2 

func (mp MultiPoint) BufferInMeter(width float64, quadsegs int) Geometry

BufferInMeter Returns a geometry that represents all points whose distance from this space.Geometry is less than or equal to distance.

func (MultiPoint) Centroid 

func (mp MultiPoint) Centroid() Point

Centroid Computes the centroid point of a geometry.

func (MultiPoint) ConvexHull 

func (mp MultiPoint) ConvexHull() Geometry

ConvexHull computes the convex hull of a geometry. The convex hull is the smallest convex geometry that encloses all geometries in the input. In the general case the convex hull is a Polygon. The convex hull of two or more collinear points is a two-point LineString. The convex hull of one or more identical points is a Point.

func (MultiPoint) CoordinateSystem added in v1.0.1 

func (mp MultiPoint) CoordinateSystem() int

CoordinateSystem return Coordinate System.

func (MultiPoint) Dimensions 

func (mp MultiPoint) Dimensions() int

Dimensions returns 0 because a MultiPoint is a 0d object.

func (MultiPoint) Distance 

func (mp MultiPoint) Distance(g Geometry) (float64, error)

Distance returns distance Between the two Geometry.

func (MultiPoint) Envelope 

func (mp MultiPoint) Envelope() Geometry

Envelope returns the minimum bounding box for the supplied geometry, as a geometry. The polygon is defined by the corner points of the bounding box ((MINX, MINY), (MINX, MAXY), (MAXX, MAXY), (MAXX, MINY), (MINX, MINY)).

func (MultiPoint) Equals 

func (mp MultiPoint) Equals(g Geometry) bool

Equals checks if the MultiPoint represents the same Geometry or vector.

func (MultiPoint) EqualsExact 

func (mp MultiPoint) EqualsExact(g Geometry, tolerance float64) bool

EqualsExact Returns true if the two Geometries are exactly equal, up to a specified distance tolerance. Two Geometries are exactly equal within a distance tolerance

func (MultiPoint) EqualsMultiPoint 

func (mp MultiPoint) EqualsMultiPoint(multiPoint MultiPoint) bool

EqualsMultiPoint compares two MultiPoint objects. Returns true if lengths are the same and all points are Equal, and in the same order.

func (MultiPoint) Filter added in v1.0.2 

func (mp MultiPoint) Filter(f matrix.Filter) Geometry

Filter Performs an operation with the provided .

func (MultiPoint) GeoJSONType 

func (mp MultiPoint) GeoJSONType() string

GeoJSONType returns the GeoJSON type for the object.

func (MultiPoint) Geom added in v1.1.0 

func (mp MultiPoint) Geom() Geometry

Geom return Geometry without Coordinate System.

func (MultiPoint) IsClosed 

func (mp MultiPoint) IsClosed() bool

IsClosed Returns TRUE if the LINESTRING's start and end points are coincident. For Polyhedral Surfaces, reports if the surface is areal (open) or IsC (closed).

func (MultiPoint) IsCollection 

func (mp MultiPoint) IsCollection() bool

IsCollection returns true if the Geometry is collection.

func (MultiPoint) IsCorrect added in v1.1.2 

func (mp MultiPoint) IsCorrect() bool

IsCorrect returns true if the geometry struct is Correct.

func (MultiPoint) IsEmpty 

func (mp MultiPoint) IsEmpty() bool

IsEmpty returns true if the Geometry is empty.

func (MultiPoint) IsRing 

func (mp MultiPoint) IsRing() bool

IsRing returns true if the lineal geometry has the ring property.

func (MultiPoint) IsSimple 

func (mp MultiPoint) IsSimple() bool

IsSimple returns true if this space.Geometry has no anomalous geometric points, such as self intersection or self tangency.

func (MultiPoint) IsValid 

func (mp MultiPoint) IsValid() bool

IsValid returns true if the geometry is valid.

func (MultiPoint) Length 

func (mp MultiPoint) Length() float64

Length Returns the length of this geometry

func (MultiPoint) Nums 

func (mp MultiPoint) Nums() int

Nums num of multiPoint.

func (MultiPoint) PointOnSurface 

func (mp MultiPoint) PointOnSurface() Geometry

PointOnSurface Returns a POINT guaranteed to intersect a surface.

func (MultiPoint) Simplify 

func (mp MultiPoint) Simplify(tolerance float64) Geometry

Simplify returns a "simplified" version of the given geometry using the Douglas-Peucker algorithm, May not preserve topology

func (MultiPoint) SimplifyP 

func (mp MultiPoint) SimplifyP(tolerance float64) Geometry

SimplifyP returns a geometry simplified by amount given by tolerance. Unlike Simplify, SimplifyP guarantees it will preserve topology.

func (MultiPoint) SpheroidDistance 

func (mp MultiPoint) SpheroidDistance(g Geometry) (float64, error)

SpheroidDistance returns spheroid distance Between the two Geometry.

func (MultiPoint) ToMatrix 

func (mp MultiPoint) ToMatrix() matrix.Steric

ToMatrix returns the Steric of a geometry.

func (MultiPoint) ToPointArray 

func (mp MultiPoint) ToPointArray() (pa []Point)

ToPointArray returns the PointArray

func (MultiPoint) UniquePoints 

func (mp MultiPoint) UniquePoints() MultiPoint

UniquePoints return all distinct vertices of input geometry as a MultiPoint.

type MultiPolygon 

type MultiPolygon []Polygon

MultiPolygon is a set of polygons.

func (MultiPolygon) Area 

func (mp MultiPolygon) Area() (float64, error)

Area returns the area of a polygonal geometry.

func (MultiPolygon) Bound 

func (mp MultiPolygon) Bound() Bound

Bound returns a bound around the multi-polygon.

func (MultiPolygon) Boundary 

func (mp MultiPolygon) Boundary() (Geometry, error)

Boundary returns the closure of the combinatorial boundary of this space.Geometry.

func (MultiPolygon) Buffer 

func (mp MultiPolygon) Buffer(width float64, quadsegs int) Geometry

Buffer Returns a geometry that represents all points whose distance from this space.Geometry is less than or equal to distance.

func (MultiPolygon) BufferInMeter added in v1.0.2 

func (mp MultiPolygon) BufferInMeter(width float64, quadsegs int) Geometry

BufferInMeter Returns a geometry that represents all points whose distance from this space.Geometry is less than or equal to distance.

func (MultiPolygon) Centroid 

func (mp MultiPolygon) Centroid() Point

Centroid Computes the centroid point of a geometry.

func (MultiPolygon) ConvexHull 

func (mp MultiPolygon) ConvexHull() Geometry

ConvexHull computes the convex hull of a geometry. The convex hull is the smallest convex geometry that encloses all geometries in the input. In the general case the convex hull is a Polygon. The convex hull of two or more collinear points is a two-point LineString. The convex hull of one or more identical points is a Point.

func (MultiPolygon) CoordinateSystem added in v1.0.1 

func (mp MultiPolygon) CoordinateSystem() int

CoordinateSystem return Coordinate System.

func (MultiPolygon) Dimensions 

func (mp MultiPolygon) Dimensions() int

Dimensions returns 0 because a MultiPoint is a 0d object.

func (MultiPolygon) Distance 

func (mp MultiPolygon) Distance(g Geometry) (float64, error)

Distance returns distance Between the two Geometry.

func (MultiPolygon) Envelope 

func (mp MultiPolygon) Envelope() Geometry

Envelope returns the minimum bounding box for the supplied geometry, as a geometry. The polygon is defined by the corner points of the bounding box ((MINX, MINY), (MINX, MAXY), (MAXX, MAXY), (MAXX, MINY), (MINX, MINY)).

func (MultiPolygon) Equals 

func (mp MultiPolygon) Equals(g Geometry) bool

Equals checks if the MultiPolygon represents the same Geometry or vector.

func (MultiPolygon) EqualsExact 

func (mp MultiPolygon) EqualsExact(g Geometry, tolerance float64) bool

EqualsExact Returns true if the two Geometries are exactly equal, up to a specified distance tolerance. Two Geometries are exactly equal within a distance tolerance

func (MultiPolygon) EqualsMultiPolygon 

func (mp MultiPolygon) EqualsMultiPolygon(multiPolygon MultiPolygon) bool

EqualsMultiPolygon compares two multi-polygons.

func (MultiPolygon) Filter added in v1.0.2 

func (mp MultiPolygon) Filter(f matrix.Filter) Geometry

Filter Performs an operation with the provided .

func (MultiPolygon) GeoJSONType 

func (mp MultiPolygon) GeoJSONType() string

GeoJSONType returns the GeoJSON type for the object.

func (MultiPolygon) Geom added in v1.1.0 

func (mp MultiPolygon) Geom() Geometry

Geom return Geometry without Coordinate System.

func (MultiPolygon) IsClosed 

func (mp MultiPolygon) IsClosed() bool

IsClosed Returns TRUE if the LINESTRING's start and end points are coincident. For Polyhedral Surfaces, reports if the surface is areal (open) or IsC (closed).

func (MultiPolygon) IsCollection 

func (mp MultiPolygon) IsCollection() bool

IsCollection returns true if the Geometry is collection.

func (MultiPolygon) IsCorrect added in v1.1.2 

func (mp MultiPolygon) IsCorrect() bool

IsCorrect returns true if the geometry struct is Correct.

func (MultiPolygon) IsEmpty 

func (mp MultiPolygon) IsEmpty() bool

IsEmpty returns true if the Geometry is empty.

func (MultiPolygon) IsRing 

func (mp MultiPolygon) IsRing() bool

IsRing returns true if the lineal geometry has the ring property.

func (MultiPolygon) IsSimple 

func (mp MultiPolygon) IsSimple() bool

IsSimple returns true if this space.Geometry has no anomalous geometric points, such as self intersection or self tangency.

func (MultiPolygon) IsValid 

func (mp MultiPolygon) IsValid() bool

IsValid returns true if the geometry is valid.

func (MultiPolygon) Length 

func (mp MultiPolygon) Length() float64

Length Returns the length of this MultiPolygon

func (MultiPolygon) Nums 

func (mp MultiPolygon) Nums() int

Nums num of multiPolygons

func (MultiPolygon) PointOnSurface 

func (mp MultiPolygon) PointOnSurface() Geometry

PointOnSurface Returns a POINT guaranteed to intersect a surface.

func (MultiPolygon) Simplify 

func (mp MultiPolygon) Simplify(tolerance float64) Geometry

Simplify returns a "simplified" version of the given geometry using the Douglas-Peucker algorithm, May not preserve topology

func (MultiPolygon) SimplifyP 

func (mp MultiPolygon) SimplifyP(tolerance float64) Geometry

SimplifyP returns a geometry simplified by amount given by tolerance. Unlike Simplify, SimplifyP guarantees it will preserve topology.

func (MultiPolygon) SpheroidDistance 

func (mp MultiPolygon) SpheroidDistance(g Geometry) (float64, error)

SpheroidDistance returns spheroid distance Between the two Geometry.

func (MultiPolygon) ToMatrix 

func (mp MultiPolygon) ToMatrix() matrix.Steric

ToMatrix returns the Steric of a geometry.

func (MultiPolygon) UniquePoints 

func (mp MultiPolygon) UniquePoints() MultiPoint

UniquePoints return all distinct vertices of input geometry as a MultiPoint.

type Point 

type Point matrix.Matrix

Point describes a geographic point

func Centroid 

func Centroid(geom Geometry) Point

Centroid Computes the centroid point of a geometry.

func (Point) Area 

func (p Point) Area() (float64, error)

Area returns the area of a polygonal geometry. The area of a point is 0.

func (Point) Bound 

func (p Point) Bound() Bound

Bound returns a single point bound of the point.

func (Point) Boundary 

func (p Point) Boundary() (Geometry, error)

Boundary returns the closure of the combinatorial boundary of this Geometry.

func (Point) Buffer 

func (p Point) Buffer(width float64, quadsegs int) Geometry

Buffer Returns a geometry that represents all points whose distance from this space.Geometry is less than or equal to distance.

func (Point) BufferInMeter added in v1.0.2 

func (p Point) BufferInMeter(width float64, quadsegs int) Geometry

BufferInMeter Returns a geometry that represents all points whose distance from this space.Geometry is less than or equal to distance.

func (Point) Centroid 

func (p Point) Centroid() Point

Centroid Computes the centroid point of a geometry.

func (Point) ConvexHull 

func (p Point) ConvexHull() Geometry

ConvexHull computes the convex hull of a geometry. The convex hull is the smallest convex geometry that encloses all geometries in the input. In the general case the convex hull is a Polygon. The convex hull of two or more collinear points is a two-point LineString. The convex hull of one or more identical points is a Point.

func (Point) CoordinateSystem added in v1.0.1 

func (p Point) CoordinateSystem() int

CoordinateSystem return Coordinate System.

func (Point) Dimensions 

func (p Point) Dimensions() int

Dimensions returns 0 because a point is a 0d object.

func (Point) Distance 

func (p Point) Distance(g Geometry) (float64, error)

Distance returns distance Between the two Geometry.

func (Point) Envelope 

func (p Point) Envelope() Geometry

Envelope returns the minimum bounding box for the supplied geometry, as a geometry. The polygon is defined by the corner points of the bounding box ((MINX, MINY), (MINX, MAXY), (MAXX, MAXY), (MAXX, MINY), (MINX, MINY)).

func (Point) Equals 

func (p Point) Equals(g Geometry) bool

Equals checks if the point represents the same Geometry or vector.

func (Point) EqualsExact 

func (p Point) EqualsExact(g Geometry, tolerance float64) bool

EqualsExact Returns true if the two Geometries are exactly equal, up to a specified distance tolerance. Two Geometries are exactly equal within a distance tolerance

func (Point) EqualsPoint 

func (p Point) EqualsPoint(point Point) bool

EqualsPoint checks if the point represents the same point or vector.

func (Point) Filter added in v1.0.2 

func (p Point) Filter(f matrix.Filter) Geometry

Filter Performs an operation with the provided .

func (Point) Generate 

func (p Point) Generate(r *rand.Rand, _ int) reflect.Value

Generate implements the Generator interface for Points

func (Point) GeoJSONType 

func (p Point) GeoJSONType() string

GeoJSONType returns GeoJSON type for the point

func (Point) Geom added in v1.1.0 

func (p Point) Geom() Geometry

Geom return Geometry without Coordinate System.

func (Point) IsClosed 

func (p Point) IsClosed() bool

IsClosed Returns TRUE if the LINESTRING's start and end points are coincident. For Polyhedral Surfaces, reports if the surface is areal (open) or IsC (closed).

func (Point) IsCollection 

func (p Point) IsCollection() bool

IsCollection returns true if the Geometry is collection.

func (Point) IsCorrect added in v1.1.2 

func (p Point) IsCorrect() bool

IsCorrect returns true if the geometry struct is Correct.

func (Point) IsEmpty 

func (p Point) IsEmpty() bool

IsEmpty returns true if the Geometry is empty.

func (Point) IsRing 

func (p Point) IsRing() bool

IsRing returns true if the lineal geometry has the ring property.

func (Point) IsSimple 

func (p Point) IsSimple() bool

IsSimple returns true if this Geometry has no anomalous geometric points, such as self intersection or self tangency.

func (Point) IsValid 

func (p Point) IsValid() bool

IsValid returns true if the geometry is valid.

func (Point) Lat 

func (p Point) Lat() float64

Lat returns the vertical, latitude coordinate of the point.

func (Point) Length 

func (p Point) Length() float64

Length Returns the length of this geometry

func (Point) Lon 

func (p Point) Lon() float64

Lon returns the horizontal, longitude coordinate of the point.

func (Point) Nums 

func (p Point) Nums() int

Nums num of points

func (Point) PointOnSurface 

func (p Point) PointOnSurface() Geometry

PointOnSurface Returns a POINT guaranteed to intersect a surface.

func (Point) Simplify 

func (p Point) Simplify(tolerance float64) Geometry

Simplify returns a "simplified" version of the given geometry using the Douglas-Peucker algorithm, May not preserve topology

func (Point) SimplifyP 

func (p Point) SimplifyP(tolerance float64) Geometry

SimplifyP returns a geometry simplified by amount given by tolerance. Unlike Simplify, SimplifyP guarantees it will preserve topology.

func (Point) SpheroidDistance 

func (p Point) SpheroidDistance(g Geometry) (float64, error)

SpheroidDistance returns spheroid distance Between the two Geometry.

func (Point) ToMatrix 

func (p Point) ToMatrix() matrix.Steric

ToMatrix returns the Steric of a geometry.

func (Point) UniquePoints 

func (p Point) UniquePoints() MultiPoint

UniquePoints return all distinct vertices of input geometry as a MultiPoint.

func (Point) X 

func (p Point) X() float64

X returns the horizontal coordinate of the point.

func (Point) Y 

func (p Point) Y() float64

Y returns the vertical coordinate of the point.

type Polygon 

type Polygon matrix.PolygonMatrix

Polygon is a closed area. The first LineString is the outer ring. The others are the holes. Each LineString is expected to be closed ie. the first point matches the last.

func (Polygon) Area 

func (p Polygon) Area() (float64, error)

Area returns the area of a polygonal geometry.

func (Polygon) Bound 

func (p Polygon) Bound() Bound

Bound returns a bound around the polygon.

func (Polygon) Boundary 

func (p Polygon) Boundary() (Geometry, error)

Boundary returns the closure of the combinatorial boundary of this space.Geometry.

func (Polygon) Buffer 

func (p Polygon) Buffer(width float64, quadsegs int) Geometry

Buffer Returns a geometry that represents all points whose distance from this space.Geometry is less than or equal to distance.

func (Polygon) BufferInMeter added in v1.0.2 

func (p Polygon) BufferInMeter(width float64, quadsegs int) Geometry

BufferInMeter Returns a geometry that represents all points whose distance from this space.Geometry is less than or equal to distance.

func (Polygon) Centroid 

func (p Polygon) Centroid() Point

Centroid Computes the centroid point of a geometry.

func (Polygon) ConvexHull 

func (p Polygon) ConvexHull() Geometry

ConvexHull computes the convex hull of a geometry. The convex hull is the smallest convex geometry that encloses all geometries in the input. In the general case the convex hull is a Polygon. The convex hull of two or more collinear points is a two-point LineString. The convex hull of one or more identical points is a Point.

func (Polygon) CoordinateSystem added in v1.0.1 

func (p Polygon) CoordinateSystem() int

CoordinateSystem return Coordinate System.

func (Polygon) Dimensions 

func (p Polygon) Dimensions() int

Dimensions returns 2 because a Polygon is a 2d object.

func (Polygon) Distance 

func (p Polygon) Distance(g Geometry) (float64, error)

Distance returns distance Between the two Geometry.

func (Polygon) Envelope 

func (p Polygon) Envelope() Geometry

Envelope returns the minimum bounding box for the supplied geometry, as a geometry. The polygon is defined by the corner points of the bounding box ((MINX, MINY), (MINX, MAXY), (MAXX, MAXY), (MAXX, MINY), (MINX, MINY)).

func (Polygon) Equals 

func (p Polygon) Equals(g Geometry) bool

Equals checks if the Polygon represents the same Geometry or vector.

func (Polygon) EqualsExact 

func (p Polygon) EqualsExact(g Geometry, tolerance float64) bool

EqualsExact Returns true if the two Geometries are exactly equal, up to a specified distance tolerance. Two Geometries are exactly equal within a distance tolerance

func (Polygon) EqualsPolygon 

func (p Polygon) EqualsPolygon(polygon Polygon) bool

EqualsPolygon comEqualPolygonpares two polygons. Returns true if lengths are the same and all points are Equal.

func (Polygon) Filter added in v1.0.2 

func (p Polygon) Filter(f matrix.Filter) Geometry

Filter Performs an operation with the provided .

func (Polygon) GeoJSONType 

func (p Polygon) GeoJSONType() string

GeoJSONType returns the GeoJSON type for the polygon.

func (Polygon) Geom added in v1.1.0 

func (p Polygon) Geom() Geometry

Geom return Geometry without Coordinate System.

func (Polygon) Holes 

func (p Polygon) Holes() []Ring

Holes returns Holes..

func (Polygon) IsClosed 

func (p Polygon) IsClosed() bool

IsClosed Returns TRUE if the LINESTRING's start and end points are coincident. For Polyhedral Surfaces, reports if the surface is areal (open) or IsC (closed).

func (Polygon) IsCollection 

func (p Polygon) IsCollection() bool

IsCollection returns true if the Geometry is collection.

func (Polygon) IsCorrect added in v1.1.2 

func (p Polygon) IsCorrect() bool

IsCorrect returns true if the geometry struct is Correct.

func (Polygon) IsEmpty 

func (p Polygon) IsEmpty() bool

IsEmpty returns true if the Geometry is empty.

func (Polygon) IsRectangle 

func (p Polygon) IsRectangle() bool

IsRectangle returns true if the polygon is rectangle.

func (Polygon) IsRing 

func (p Polygon) IsRing() bool

IsRing returns true if the lineal geometry has the ring property.

func (Polygon) IsSimple 

func (p Polygon) IsSimple() bool

IsSimple returns true if this space.Geometry has no anomalous geometric points, such as self intersection or self tangency.

func (Polygon) IsValid 

func (p Polygon) IsValid() bool

IsValid returns true if the geometry is valid.

func (Polygon) Length 

func (p Polygon) Length() float64

Length Returns the length of this Polygon

func (Polygon) Nums 

func (p Polygon) Nums() int

Nums num of polygons

func (Polygon) PointOnSurface 

func (p Polygon) PointOnSurface() Geometry

PointOnSurface Returns a POINT guaranteed to intersect a surface.

func (Polygon) Shell 

func (p Polygon) Shell() Ring

Shell returns shell..

func (Polygon) Simplify 

func (p Polygon) Simplify(tolerance float64) Geometry

Simplify returns a "simplified" version of the given geometry using the Douglas-Peucker algorithm, May not preserve topology

func (Polygon) SimplifyP 

func (p Polygon) SimplifyP(tolerance float64) Geometry

SimplifyP returns a geometry simplified by amount given by tolerance. Unlike Simplify, SimplifyP guarantees it will preserve topology.

func (Polygon) SpheroidDistance 

func (p Polygon) SpheroidDistance(g Geometry) (float64, error)

SpheroidDistance returns spheroid distance Between the two Geometry.

func (Polygon) ToMatrix 

func (p Polygon) ToMatrix() matrix.Steric

ToMatrix returns the LineMatrix of a Ring geometry.

func (Polygon) ToRingArray 

func (p Polygon) ToRingArray() (r []Ring)

ToRingArray returns the RingArray

func (Polygon) UniquePoints 

func (p Polygon) UniquePoints() MultiPoint

UniquePoints return all distinct vertices of input geometry as a MultiPoint.

type Ring 

type Ring LineString

Ring represents a set of ring on the earth.

func (Ring) Area 

func (r Ring) Area() (float64, error)

Area returns the area of a polygonal geometry.

func (Ring) Bound 

func (r Ring) Bound() Bound

Bound returns a rect around the ring. Uses rectangular coordinates.

func (Ring) Boundary 

func (r Ring) Boundary() (Geometry, error)

Boundary returns the closure of the combinatorial boundary of this space.Geometry. The boundary of a lineal geometry is always a zero-dimensional geometry (which may be empty).

func (Ring) Buffer 

func (r Ring) Buffer(width float64, quadsegs int) Geometry

Buffer Returns a geometry that represents all points whose distance from this space.Geometry is less than or equal to distance.

func (Ring) BufferInMeter added in v1.0.2 

func (r Ring) BufferInMeter(width float64, quadsegs int) Geometry

BufferInMeter Returns a geometry that represents all points whose distance from this space.Geometry is less than or equal to distance.

func (Ring) Centroid 

func (r Ring) Centroid() Point

Centroid Computes the centroid point of a geometry.

func (Ring) ConvexHull 

func (r Ring) ConvexHull() Geometry

ConvexHull computes the convex hull of a geometry. The convex hull is the smallest convex geometry that encloses all geometries in the input. In the general case the convex hull is a Polygon. The convex hull of two or more collinear points is a two-point LineString. The convex hull of one or more identical points is a Point.

func (Ring) CoordinateSystem added in v1.0.1 

func (r Ring) CoordinateSystem() int

CoordinateSystem return Coordinate System.

func (Ring) Dimensions 

func (r Ring) Dimensions() int

Dimensions returns 2 because a Ring is a 2d object.

func (Ring) Distance 

func (r Ring) Distance(g Geometry) (float64, error)

Distance returns distance Between the two Geometry.

func (Ring) Envelope 

func (r Ring) Envelope() Geometry

Envelope returns the minimum bounding box for the supplied geometry, as a geometry. The polygon is defined by the corner points of the bounding box ((MINX, MINY), (MINX, MAXY), (MAXX, MAXY), (MAXX, MINY), (MINX, MINY)).

func (Ring) Equals 

func (r Ring) Equals(g Geometry) bool

Equals checks if the Ring represents the same Geometry or vector.

func (Ring) EqualsExact 

func (r Ring) EqualsExact(g Geometry, tolerance float64) bool

EqualsExact Returns true if the two Geometries are exactly equal, up to a specified distance tolerance. Two Geometries are exactly equal within a distance tolerance

func (Ring) EqualsRing added in v1.0.2 

func (r Ring) EqualsRing(ring Ring) bool

EqualsRing compares two rings. Returns true if lengths are the same and all points are Equal.

func (Ring) Filter added in v1.0.2 

func (r Ring) Filter(f matrix.Filter) Geometry

Filter Performs an operation with the provided .

func (Ring) GeoJSONType 

func (r Ring) GeoJSONType() string

GeoJSONType returns the GeoJSON type for the ring.

func (Ring) Geom added in v1.1.0 

func (r Ring) Geom() Geometry

Geom return Geometry without Coordinate System.

func (Ring) IsClosed 

func (r Ring) IsClosed() bool

IsClosed Returns TRUE if the LINESTRING's start and end points are coincident. For Polyhedral Surfaces, reports if the surface is areal (open) or IsC (closed).

func (Ring) IsCollection 

func (r Ring) IsCollection() bool

IsCollection returns true if the Geometry is collection.

func (Ring) IsCorrect added in v1.1.2 

func (r Ring) IsCorrect() bool

IsCorrect returns true if the geometry struct is Correct.

func (Ring) IsEmpty 

func (r Ring) IsEmpty() bool

IsEmpty returns true if the Geometry is empty.

func (Ring) IsRing 

func (r Ring) IsRing() bool

IsRing returns true if the lineal geometry has the ring property.

func (Ring) IsSimple 

func (r Ring) IsSimple() bool

IsSimple returns true if this space.Geometry has no anomalous geometric points, such as self intersection or self tangency.

func (Ring) IsValid 

func (r Ring) IsValid() bool

IsValid returns true if the geometry is valid.

func (Ring) Length 

func (r Ring) Length() float64

Length Returns the length of this LineString

func (Ring) Nums 

func (r Ring) Nums() int

Nums num of linstrings

func (Ring) PointOnSurface 

func (r Ring) PointOnSurface() Geometry

PointOnSurface Returns a POINT guaranteed to intersect a surface.

func (Ring) Simplify 

func (r Ring) Simplify(tolerance float64) Geometry

Simplify returns a "simplified" version of the given geometry using the Douglas-Peucker algorithm, May not preserve topology

func (Ring) SimplifyP 

func (r Ring) SimplifyP(tolerance float64) Geometry

SimplifyP returns a geometry simplified by amount given by tolerance. Unlike Simplify, SimplifyP guarantees it will preserve topology.

func (Ring) SpheroidDistance 

func (r Ring) SpheroidDistance(g Geometry) (float64, error)

SpheroidDistance returns spheroid distance Between the two Geometry.

func (Ring) ToMatrix 

func (r Ring) ToMatrix() matrix.Steric

ToMatrix returns the LineMatrix of a Ring geometry.

func (Ring) UniquePoints 

func (r Ring) UniquePoints() MultiPoint

UniquePoints return all distinct vertices of input geometry as a MultiPoint.

Source Files

View all Source files

Directories

Path Synopsis
Package spaceerr A representation of error.
 Package spaceerr A representation of error.
Package topograph the topological relations between points, line and surface entities in DE-9IM model are given.
 Package topograph the topological relations between points, line and surface entities in DE-9IM model are given.
Package topograph the topological relations between points, line and surface entities in DE-9IM model are given.
 Package topograph the topological relations between points, line and surface entities in DE-9IM model are given.

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