airy.radius([radius]) Defaults to 90°.
d3.geoPolyhedral(root, face[, angle]) Defines a new polyhedral projection. The root is a spanning tree
d3.geoTwoPointAzimuthalUsa()
gingery.radius([radius]) Defaults to 30°.
d3.geoTransverseMercator() d3.geoTransverseMercatorRaw
d3.geoConicConformal() d3.geoConicConformalRaw
bottomley.fraction([fraction]) Defaults to 0.5, corresponding to a sin(ψ) where ψ = π/6.
d3.geoBerghaus() d3.geoBerghausRaw(lobes)
d3.geoNellHammer() d3.geoNellHammerRaw
d3.geoLittrow() d3.geoLittrowRaw
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