![]() ![]() Azimuth of the light – the angular direction of the sun, measured from north in clockwise degrees from 0 to 360.Z factor vertical exaggeration – used to emphasise vertical features especially where they might be too small to identify relative to the horizontal scale.QGIS has a great GDAL hill shade option that allows you to import your raster (DEM) and output a shaded relief effect based on the parameters you set in the dialogue box. ![]() I chose an area of 1350km by 1000km at a scale of 1:1,470,000 and clipped from the original DEM before using it to create hill shade. Next, I located the lunar landing site of Apollo 11 and worked out the extent of the moon around it that I wanted to map. The DEM was projected using the Moon 2000 projection (IAU 2000:30100). From this DEM we were able to create a terrain representation using Geographic Information Software (GIS).Īfter a few issues trying to download the DEM due to the United States Federal Government shutdown, I was eventually able to load it into a GIS, in this case QGIS. The United States Geological Survey (USGS) have a 60 metre per pixel DEM which was created by NASA’s LOLA Team and JAXA’s SELENE/Kaguya Team. The good news is there are lots of Digital Elevation Model’s or DEM’s of the Moon, which are 3D representations of a terrain’s surface. The first step in creating a map of the Moon is to identify available data that represents the Moon’s topography. Eventually a site within the Sea of Tranquility was chosen. The original requirement that the site be free of craters had to be relaxed. A general slope of less than 2 degrees in the landing area.Have good visibility during the landing approach, meaning that the Sun would be between 7 and 20 degrees behind the Landing Module.Provide the Apollo spacecraft with a free-return trajectory, one that would allow it to coast around the Moon and safely return to Earth without requiring any engine firings should a problem arise on the way to the Moon.Be reachable with a minimum amount of propellant. ![]()
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