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I have a historical map (Arctic Ocean) with unknown CRS system.

This is the Arctic Ocean

In order to compare it with my results, I have to merge them somehow.

Could someone suggest the closest possible coordinate reference system in which the map was made or how I could merge my raster with it?

4

Just a wild guess, to me it looks similar to a Lambert azimuthal equal-area projection, rotated 80 degrees (I mean, looking from N80E toward N100W direction).

enter image description here

(Above: North Pole area by QGIS 3.8 on EPSG:102017 North_Pole_Lambert_Azimuthal_Equal_Area, rotating 80.0 degrees).

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