d3.geoHealpix() d3.geoHealpixRaw(lobes) The HEALPix projection: a Hierarchical Equal Area isoLatitude Pixelisation of a 2-sphere. In this implementation, the parameter K is fixed at 3. Note: requires clipping to the sphere.

d3.geoGringorten() d3.geoGringortenRaw The Gringorten square equal-area projection, rearranged to give each hemisphere an entire square.

d3.geoHammer() d3.geoHammerRaw(A, B) The Hammer projection. Depending the chosen coefficient and aspect, also known as Eckert–Greifendorff, quartic authalic, and Briesemeister.

d3.geoGuyou() d3.geoGuyouRaw The Guyou hemisphere-in-a-square projection. Peirce is credited with its quincuncial form.

d3.geoGringortenQuincuncial() The Gringorten square equal-area projection.

d3.geoGraticule10() A convenience method for directly generating the default 10° global graticule as a GeoJSON MultiLineString geometry object. Equivalent to: function geoGraticule10() { return d3.geoGraticule()(); }

d3.geoGnomonic() d3.geoGnomonicRaw The gnomonic projection.

d3.geoGnomonic() d3.geoGnomonicRaw The gnomonic projection; see d3-geo.

d3.geoGraticule() Constructs a feature generator for creating graticules: a uniform grid of meridians and parallels for showing projection distortion. The default graticule has meridians and parallels every 10° between ±80° latitude; for the polar regions, there are meridians every 90°.

d3.geoGinzburg9() d3.geoGinzburg9Raw The Ginzburg IX projection.