hammerRetroazimuthal.parallel([parallel]) Defaults to 45°.
bottomley.fraction([fraction]) Defaults to 0.5, corresponding to a sin(ψ) where ψ = π/6.
d3.geoCylindricalEqualArea() d3.geoCylindricalEqualAreaRaw(phi0)
d3.geoConicConformal() d3.geoConicConformalRaw
d3.geoWinkel3() d3.geoWinkel3Raw
gingery.radius([radius]) Defaults to 30°.
d3.geoLittrow() d3.geoLittrowRaw
d3.geoStereographic() d3.geoStereographicRaw
d3.geoRobinson() d3.geoRobinsonRaw
d3.geoHomolosine() d3.geoHomolosineRaw
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