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This Mars HD DLC (addon) contains high-resolution maps of Mars and its satellites, Phobos and Deimos. It improves the level of detail of the Martian surface compared to the default SpaceEngine installation, and replaces the low-quality JPEG textures for Mars and its moons with high-quality PNG ones.

Credits:
Mars surface map by John van Vliet and Robert Skuridin "PBC"
Mars elevation map - Mars HRSC MOLA Blended DEM Global 200m v2
Phobos surface map by Phil Stooke
Deimos surface map by Robert Skuridin "PBC"

Source data:
Mars elevation map: Mars Mars Global Surveyor MOLA, Mars Express HRSC
Image resolution: 106697x53347
Effective resolution 0.2 km/pix

Mars surface albedo map: Mars Global Surveyor MOC Wide Angle Atlas
Image resolution: 32768x16384.
Effective resolution 0.65 km/pix.

Phobos surface albedo map: Phobos Viking Global Mosaic DLR controlled 5m
Image resolution: 14400x7200
Effective resolution 4.84 m/pix

Deimos surface albedo map: Viking Global Mosaic
Image resolution: 2048x1024
Effective resolution 19 m/pix