d4_geo
library
Classes
GeoAlbersUsa
A U.S.-centric composite projection of three geoConicEqualArea
projections.
GeoCircle
A geometry geographic generator for creating circles.
GeoConicProjection
Conic projections project the sphere onto a cone, and then unroll the cone
onto the plane.
GeoGraticule
A geometry geographic generator for creating graticules.
GeoIdentity
The identity transform can be used to scale, translate and clip planar
geometry.
GeoPath
A geometry geographic generator for creating paths.
GeoPathContext
Renders a path to a canvas using a subset of the CanvasRenderingContext2D
API.
GeoProjection
Projections transform spherical polygonal geometry to planar polygonal
geometry.
GeoProjectionMutator <T >
A projection wrapper to mutate as needed.
GeoRawTransform
Raw transforms are point transformation functions that are used to implement
custom projections.
GeoRotation
A raw transform that represents a rotation about
each spherical axis .
GeoStream
Streams have several function-properties that are called to transform an
input geometry.
GeoTransform
Transforms are a generalization of projections.
GeoTransverseMercator
The transverse spherical Mercator projection.
Functions
geoAlbers ()
→ GeoProjection
The Albers’ equal area-conic projection.
geoArea (Map object → double
Returns the spherical area of the specified GeoJSON object in
steradians .
geoAzimuthalEqualArea ()
→ GeoProjection
The azimuthal equal-area projection.
geoAzimuthalEquidistant ()
→ GeoProjection
The azimuthal equidistant projection.
geoBounds (Map object → List <List <num
Returns the
spherical bounding box for the
specified GeoJSON object.
geoCentroid (Map object → List <double
Returns the spherical centroid of the specified GeoJSON object.
geoClipCircle (double angle → GeoStream Function(GeoStream
Generates a clipping function which transforms a stream such that geometries
are bounded by a small circle of radius angle around the
GeoProjection.center .
geoClipRectangle (num x0 , num y0 , num x1 , num y1 → GeoStream Function(GeoStream
Generates a clipping function which transforms a stream such that geometries
are bounded by a rectangle of coordinates [[x0, y0], [x1, y1]].
geoConicConformal ()
→ GeoConicProjection
The conic conformal projection.
geoConicConformalRaw (List <double y → GeoRawTransform
The raw conic conformal projection.
geoConicEqualArea ()
→ GeoConicProjection
The Albers’ equal-area conic projection.
geoConicEqualAreaRaw (List <double y → GeoRawTransform
The raw Albers’ equal-area conic projection.
geoConicEquidistant ()
→ GeoConicProjection
The conic equidistant projection.
geoConicEquidistantRaw (List <double y → GeoRawTransform
The raw conic equidistant projection.
geoContains (Map ?object , List <num point → bool
Returns true if and only if the specified GeoJSON object contains the
specified point, or false if the object does not contain the point.
geoDistance (List <num a , List <num b → double
Returns the great-arc distance in
radians between the two points
a and b.
geoEqualEarth ()
→ GeoProjection
The Equal Earth projection, by Bojan Šavrič et al., 2018.
geoEquirectangular ()
→ GeoProjection
The equirectangular (plate carrée) projection.
geoGnomonic ()
→ GeoProjection
The gnomonic projection.
geoGraticule10 ()
→ Map
A convenience method for directly generating the default 10° global
graticule as a GeoJSON MultiLineString geometry object.
geoInterpolate (List <double a , List <double b → List <double Function(double
Returns an interpolator function given two points a and b.
geoLength (Map object → double
Returns the great-arc length of the specified GeoJSON object in
radians .
geoMercator ()
→ GeoProjection
The spherical Mercator projection.
geoNaturalEarth1 ()
→ GeoProjection
The Natural Earth projection is a
pseudocylindrical projection designed by Tom Patterson.
geoOrthographic ()
→ GeoProjection
The orthographic projection.
geoStereographic ()
→ GeoProjection
The stereographic projection.
