projection

[neocarto]

PROJ4 & EPSG projections do not work well when making a map containing an "outline" layer

[Fil]

From what I understand (in https://observablehq.com/@fil/proj4js-d3):

For EPSG:3031, which is centered on the South Pole, things are a bit more complicated, as a direct application breaks a few things (the Sphere, which should be in pale yellow, is not drawn). The reason for this is that, in d3, clipAngle is calculated from the projection’s rotate (in this case, [0,0]), but here we would like it to be calculated from the projection’s center (the South Pole).