Download the Digital Elevation Model made by the measurements of the Mars Global Surveyor here, and save it as heightmap.tif.
In settings.py you can adjust scale, color gradient, and lighting settings.
Running python map.py $directory will then start generating the map. Rendering consists of a five step process. First the original heightmap is downscaled, since usually we don't need such a high resolution. Then the map is reprojected to the Robinson projection. The third step is the generation of a color map. Based on the height data a color is picked from the gradient defined in the settings. After this a normal map is generated from the reprojected heightmap. Combining the normal map and the color map, lightmap will provide shading to generate the final product.
In the specified $directory the following files are generated:
hm.tifandhm.png, the heightmap, both in TIF to preserve information for the next step and as a PNG to allow easy viewing.pm.tifandpm.png, the reprojected heightmap.cm.png, the color map.nm.png, the normalmap.map.png, the final shaded map.
To combine everything in a nice map, annotations.svg has the names of many different features and an overlay with lines showing latitudes and longitudes.
All graphics files in this project are licensed under the CC-BY-SA 3.0.
All code in this project is licensed under the GPL version 3 or (at your option) any later version.