d3.geoLength(feature) Returns the great-arc length of the specified GeoJSON feature in

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

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

d3.geoRotation(angles) Returns a rotation function

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

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

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

d3.geoProjection(project) Constructs a new projection from the specified

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