README
projgeom
Go library for geodesic reprojections of Open GIS Consortium-style geometry objects.
Documentation
Index ¶
- type SR
- type Transformer
- func AEA(this *SR) (forward, inverse Transformer, err error)
- func EqdC(this *SR) (forward, inverse Transformer, err error)
- func Krovak(this *SR) (forward, inverse Transformer, err error)
- func LCC(this *SR) (forward, inverse Transformer, err error)
- func LongLat(this *SR) (forward, inverse Transformer, err error)
- func Merc(this *SR) (forward, inverse Transformer, err error)
- func TMerc(this *SR) (forward, inverse Transformer, err error)
- func UTM(this *SR) (forward, inverse Transformer, err error)
- type TransformerFunc
Constants ¶
Variables ¶
Functions ¶
Types ¶
type SR ¶
type SR struct { Name, Title string SRSCode string DatumCode string Rf float64 Lat0, Lat1, Lat2, LatTS float64 Long0, Long1, Long2, LongC float64 Alpha float64 X0, Y0, K0, K float64 A, A2, B, B2 float64 Ra bool Zone float64 UTMSouth bool DatumParams []float64 ToMeter float64 Units string FromGreenwich float64 NADGrids string Axis string Ellps string EllipseName string Es float64 E float64 Ep2 float64 DatumName string NoDefs bool Czech bool // contains filtered or unexported fields }
SR holds information about a spatial reference (projection).
func (*SR) DeriveConstants ¶
func (json *SR) DeriveConstants()
DeriveConstants calculates some properties of the spatial reference based on other properties
func (*SR) Equal ¶
Equal determines whether spatial references sr and sr2 are equal to within ulp floating point units in the last place.
func (*SR) NewTransform ¶
func (source *SR) NewTransform(dest *SR) (Transformer, error)
NewTransform creates a function that transforms a point from sr to the destination spatial reference. If source ~= dest, the returned Transformer will be nil.
func (*SR) Transformers ¶
func (sr *SR) Transformers() (forward, inverse Transformer, err error)
Transformers returns forward and inverse transformation functions for this projection.
type Transformer ¶
A Transformer takes input coordinates and returns output coordinates and an error.
func AEA ¶
func AEA(this *SR) (forward, inverse Transformer, err error)
AEA is an Albers Conical Equal Area projection.
func EqdC ¶
func EqdC(this *SR) (forward, inverse Transformer, err error)
EqdC is an Equidistant Conic projection.
func Krovak ¶
func Krovak(this *SR) (forward, inverse Transformer, err error)
Krovak is a Krovak projection.
func LCC ¶
func LCC(this *SR) (forward, inverse Transformer, err error)
LCC is a Lambert Conformal Conic projection.
func LongLat ¶
func LongLat(this *SR) (forward, inverse Transformer, err error)
LongLat is a longitude-latitude (i.e., no projection) projection.
func Merc ¶
func Merc(this *SR) (forward, inverse Transformer, err error)
Merc is a mercator projection.
func TMerc ¶
func TMerc(this *SR) (forward, inverse Transformer, err error)
TMerc is a transverse Mercator projection.
func UTM ¶
func UTM(this *SR) (forward, inverse Transformer, err error)
UTM is a universal transverse Mercator projection.
type TransformerFunc ¶
type TransformerFunc func(*SR) (forward, inverse Transformer, err error)
A TransformerFunc creates forward and inverse Transformers from a projection.