Mapping Mars Open Source

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

Transcript

1. Mapping Mars Chris Herwig, MapBox chris@mapbox.com @hrwgc
2. Image by Image Editor on Flickr Space
3. Image credit: NASA/JPL-Caltech Mars Curiosity
4. 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
5. Global mosaic of Mars NASA NSSDC Photo Gallery
6. Hubble RGB Composite Image from NASA NSSDC Photo Gallery
9. Maps
10. 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
11. 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/
12. 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.
13. Raster compositing in TileMill
22. Visit Mars Twitter: @hrwgc Email: chris@mapbox.com Questions? hrwgc.github.com/planets