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

d3.geoConicConformal() d3.geoConicConformalRaw(phi0, phi1)

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

d3.geoRotation(angles) Returns a rotation function

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

graticule.extentMinor([extent]) If extent is specified, sets the minor extent of this graticule. If extent

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