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MRO CTX Example

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Leslie Keely edited this page May 17, 2017 · 7 revisions

The Context Camera (CTX) rides aboard NASA's Mars Reconnaissance Orbiter (MRO). This camera has a resolution of 6 meters/pixel.

Data Credit: NASA/JPL-Caltech/MSL Science Team

Mars Science Lab Landing Site

This digital terrain model contains some HiRISE elements as well as CTX.

  1. Download the files MSL_Gale_DEM_Mosaic_1m_v3.tif and MSL_Gale_Orthophoto_Mosaic_25cm_v3.tif from https://astrogeology.usgs.gov/search/map/Mars/MarsScienceLaboratory/Mosaics/MSL_Gale_DEM_Mosaic_10m.

  2. The width of the DEM is slightly over the power of 2 value of 32768 so we will crop it to save disk space.

gdal_translate -projwin 8128099.493 -244781.075 8160867.493 -302221.075 MSL_Gale_DEM_Mosaic_1m_v3.tif dem.tif
  1. Crop the orthoimage too.
gdal_translate -projwin 8128099.493 -244781.075 8160867.493 -302221.075 MSL_Gale_Orthophoto_Mosaic_25cm_v3.tif orthoimage.tif
  1. Create the elevation layer.
layerfactory -type=elevation -file=dem.tif -tilesize=128 -missing=-32767 -landscape=MSL
  1. Create the orthoimage layer.
layerfactory -type=grayimage -file=orthoimage.tif -tilesize=512 -landscape=MSL
  1. View the landscape in DERT

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