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Our development team is currently in a conundrum of trying to accurately georeference a small scale map of Russia that is in a very specific Polar projection.

Would anyone have a recommended Custom or Modified polar projection to use in ArcGIS Pro to most accurately georeference the below map that would cause minimal warping?

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  • Please Edit the Question to answer: Where did you obtain the map? What do they say about coordinate reference? What have you tried? Commented Sep 25 at 22:22

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Because the latitude lines look like they are equidistantly spaced, try using azimuthal equidistant. It doesn't matter which geographic coordinate system you use at that scale. The central meridian/longitude of origin is not 90, but probably something in the low 90s like 91 or 92.

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