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Mapping Mars Open Source

Avatar for Chris Herwig Chris Herwig
October 03, 2012

Mapping Mars Open Source

Presentation on open source Mars mapping project using NASA/USGS open data given at the October 2012 GeoDC Meetup

Avatar for Chris Herwig

Chris Herwig

October 03, 2012
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  1. Design • How to map a planet you've never seen

    • Accuracy vs intelligibility • What color is Mars natively? ◦ red planet ◦ atmosphere ◦ perspective • Projection, projection... Image: Layers in Aonia Terra NASA/JPL/University of Arizona
  2. Elevation Data Mars Orbiter Laser Altimeter (MOLA) • Instrument on

    the Mars Global Surveyor • Measures time it takes for a beam of light sent from MOLA to reflect off the surface. • Data access available through USGS' Planetary Interactive G.I.S.-on-the- Web Analyzable Database (PIGWAD) Image credit: NASA/JPL-Caltech
  3. Tools Used • GDAL: gdal.org • QGIS: qgis.org • TileMill:

    mapbox.com/tilemill • MapBox: mapbox.com/ • U.S.G.S. Planetary GIS Web Server: webgis.wr. usgs.gov/
  4. Workflow 1. gdaldem color-relief 2. gdaldem hillshade 3. gdaldem slope

    + gdaldem color-relief for slope shading 4. gdalwarp 1, 2, and 3 to Google Mercator 5. Use TileMill with new Mapnik compositing features to combine color- relief, hillshade, and slope shading.