d3.geoMercator() d3.geoMercatorRaw The spherical Mercator projection. Defines a default projection.clipExtent such that the world is projected to a square, clipped to approximately ±85° latitude.

d3.geoLoximuthal() d3.geoLoximuthalRaw(phi0) The loximuthal projection is “characterized by the fact that loxodromes (rhumb lines) from one chosen central point (the intersection of the central meridian and central latitude) are shown as straight lines, correct in azimuth from the center, and are ‘true to scale’… It is neither an equal-area projection nor conformal.”

d3.geoLittrow() d3.geoLittrowRaw The Littrow projection is the only conformal retroazimuthal map projection. Typically clipped to the geographic extent [[-90°, -60°], [90°, 60°]].

d3.geoLength(feature) Returns the great-arc length of the specified GeoJSON feature in radians. For polygons, returns the perimeter of the exterior ring plus that of any interior rings.

d3.geoLaskowski() d3.geoLaskowskiRaw The Laskowski tri-optimal projection simultaneously minimizes distance, angular, and areal distortion.

d3.geoLarrivee() d3.geoLarriveeRaw The Larrivée projection.

d3.geoLagrange() d3.geoLagrangeRaw(n) The Lagrange conformal projection.

d3.geoKavrayskiy7() d3.geoKavrayskiy7Raw The Kavrayskiy VII pseudocylindrical projection.

d3.geoInterruptedSinusoidal() An interrupted sinusoidal projection with asymmetrical lobe boundaries that emphasize land masses over oceans, after the Swedish Nordisk Världs Atlas as reproduced by C.A. Furuti.

d3.geoInterruptedSinuMollweide() Alan K. Philbrick’s interrupted sinu-Mollweide projection.