Thanks for sharing this! I have been trying forever to figure out how to get the Albers Siberia projection working. How did you determine the parallels, rotation, and center coordinates? Manually, or did you convert them from something like: https://spatialreference.org/ref/sr-org/albers-equal-area-russia/ ?

That one was wrong. Now fixed by this from spatialreference: PROJCS["Albers Conical Equal Area", GEOGCS["WGS 84", DATUM["WGS_1984", SPHEROID["WGS 84",6378137,298.257223563, AUTHORITY["EPSG","7030"]], TOWGS84[0,0,0,0,0,0,0], AUTHORITY["EPSG","6326"]], PRIMEM["Greenwich",0, AUTHORITY["EPSG","8901"]], UNIT["degree",0.0174532925199433, AUTHORITY["EPSG","9108"]], AUTHORITY["EPSG","4326"]], PROJECTION["Albers_Conic_Equal_Area"], PARAMETER["standard_parallel_1",50], PARAMETER["standard_parallel_2",70], PARAMETER["latitude_of_center",56], PARAMETER["longitude_of_center",100], PARAMETER["false_easting",0], PARAMETER["false_northing",0], UNIT["meters",1]]