Planetary mapping: Difference between revisions
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* GRASS lat/lon regions may be used as 0-360 longitude, not just 180 east+west. | * GRASS lat/lon regions may be used as 0-360 longitude, not just 180 east+west. | ||
* | * In GRASS 6 you can set and add custom ellipsoids, see the {{Cmd|g.setproj}} module. Permanently adding custom ellipsoids can be done by hand, the config tables for that are plain self-documenting text files, so reasonably easy to edit. An ellipse table with planetary spheroids (to put as <tt>$GISBASE/etc/*.table</tt> files) is available [http://www.unipg.it/~afrigeri/software/isisgrass here]. | ||
* GRASS 7 now includes the planetary ellipsoid tables and support is present in the wxGUI location wizard. | |||
==== Open Issues ==== | ==== Open Issues ==== | ||
* {{cmd|r.out.gdal}} exports 'unknown' ellipsoids / datums, and also the reference meridian is named 'Greenwich' | * {{cmd|r.out.gdal}} exports 'unknown' ellipsoids / datums, and also the reference meridian is named 'Greenwich' | ||
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* {{cmd|wxGUI}}: following graphics might be misleading | * {{cmd|wxGUI}}: following graphics might be misleading |
Revision as of 21:25, 30 April 2013
GIS Support
- GRASS lat/lon regions may be used as 0-360 longitude, not just 180 east+west.
- In GRASS 6 you can set and add custom ellipsoids, see the g.setproj module. Permanently adding custom ellipsoids can be done by hand, the config tables for that are plain self-documenting text files, so reasonably easy to edit. An ellipse table with planetary spheroids (to put as $GISBASE/etc/*.table files) is available here.
- GRASS 7 now includes the planetary ellipsoid tables and support is present in the wxGUI location wizard.
Open Issues
- r.out.gdal exports 'unknown' ellipsoids / datums, and also the reference meridian is named 'Greenwich'
Example of the use of GRASS GIS in Planetary Research
GRASS ps.map output as published in an article in the journal Science.
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Data
Data summary (1999):
http://publish.uwo.ca/~pjstooke/mapsummy.txt
Modules
- r.in.gdal will handle HDF and netCDF and many many more formats
- r.in.bin will load raw binary data
- see also the GRASS and GMT wiki page for interfacing with GMT Mapping Tools
Mars topography
See tutorial in GRASSNews volume 1:
- Global dataset of bathymetry and topography. GRASS Newsletter, 1:8-11, August 2004. ISSN 1614-8746.
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