Quote Originally Posted by RobA View Post
Based on your other post, I think what you want is to go from an image like this (equirectangular):

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to this:

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I did this using Gimp, with the mathmap plugin, using the following mathmap script I wrote:
that's a very cool news: I'm a developer, so maybe I could easily implement other projections I need... if just knew the formulas/algorithms I need!

I already tried "gores" projections, but it's only good up to 70-75° latitude: it's really hard to properly stitch gores at poles, that's why I also need the Lambert azimutal projection centered on poles.
Do you know the formula for it too?