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d3 / d3-geo-projection

Extended geographic projections for d3-geo.
https://observablehq.com/collection/@d3/d3-geo-projection
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Pangean projection #190

Closed gerwitz closed 4 years ago

gerwitz commented 4 years ago

I know this is ridiculous, but it can’t hurt to ask. I’d love to have a projection that maps coordinates to Pangea. E.g. http://capitan-mas-ideas.blogspot.com/2012/08/pangea-politica.html

Obviously useless for marine coordinates and only a novelty for land.

Fil commented 4 years ago

Nice idea! I would do it as a preprocessor to a projection so you'd still be able to project pangea with any projection. The idea would be to transform the current latitude& longitude to pangean's era's long&lat of the "same" places.

For an example see the warp function in https://observablehq.com/@fil/fisheye-conformal-map#warp

Fil commented 4 years ago

(Closing as this is not directly relevant for d3-geo-projection.)

TJung1968 commented 4 years ago

Maybe I’m not understanding this correctly… but is this even a matter of the projection? Wouldn’t it be sufficient to have topojson files describing the Pangea coastlines (and, if needed, present-day’s political borders on Pangea)?

gerwitz commented 4 years ago

Certainly the map could be drawn in that matter, but my goal is to map arbitrary data with land coordinates to Pangea.

Pre-warping coordinates (projecting before projecting) is a suitable workaround.

Fil commented 4 years ago

I'm interested, lmk if you need some help with this.