stream.polygonStart() Indicates the start of a polygon. The first line of a polygon indicates the exterior ring, and any subsequent

project.invert(x, y) The inverse of project

stream.sphere() Indicates the sphere (the globe; the unit sphere centered at ⟨0,0,0⟩).

graticule.lines() Returns an array of GeoJSON LineString geometry objects, one for each meridian or parallel for this graticule

projection(point) Returns a new array [x, y] (typically in pixels) representing the projected point of the

d3.geoBounds(feature) Returns the spherical

d3.geoProjectionMutator(factory) Constructs a new projection from the specified

d3.geoGraticule() Constructs a feature generator for creating graticules: a uniform grid of

stream.lineStart() Indicates the start of a line or ring. Within a polygon, indicates the start of a ring. The first ring of

graticule.precision([angle]) If precision is specified, sets the precision for this graticule, in degrees.