Difference between revisions of "Planetary mapping"

From GRASS-Wiki
Jump to navigation Jump to search
Line 81: Line 81:
: GRASS currently uses the IAU2000 definitions in the <tt>ellipse.table.solar.system</tt> file.
: GRASS currently uses the IAU2000 definitions in the <tt>ellipse.table.solar.system</tt> file.

* ...
* [https://github.com/YannChemin/iau2wkt iau2wkt]: generates on the fly WKT descriptions from planetary bodies info


Latest revision as of 11:25, 11 April 2016

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.
  • GRASS 7 now includes the IAU2009 IAU2000 Key support in the wxGUI location wizard.
IAU2009 is selected by default (IAU2000 you can browse)

Getting Started with both ISIS3 & GRASS

  • GRASS 7 now recognizes ISIS3.x installation and runs automatically the ISIS-GRASS bridge, CLI prompt is set to ISIS-GRASS. ISIS commands are available through the ISIS-GRASS command prompt, more details in GRASS Location Wizard.

Getting Started with using ISIS3 data in GRASS

  • You can create a GRASS Location based on ISIS3 .cub raster directly
  • r.external can read natively the .cub rasters inside ISIS3 data directory (no need import)
  • If you want to import into GRASS any .cub from ISIS3 use r.in.gdal

Open Issues

  • r.external complains about 'Mars' datum unknown
  • 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.

Psmap on sciencemag.png


Data summary (1999):



  • r.crater is an addon module for GRASS 7 which estimates the size of a gravity dominated impact crater, or alternatively works backwards to estimate the size of the projectile that made it.
  • d.anaglyph is an addon module for creating 3D stereo images. (see Stereoscopic analysis and Stereo anaglyphs wiki pages)
  • Isis2grass is a set of tools to make Isis > 3.3.1 and GRASS work together.
  • g.isis3mt: will output an ISIS3 Maptemplate according to the one currently used in the GRASS Location.
  • isis-grass: a startup script that will setup a common command line interface from which both ISIS3 and GRASS commands may be called.

Isis menu within GRASS

A script can generate on-the-fly an Isis Menu using the Toolboxes from wxGUI


Isis Menu in GRASS

Mars topography

Olympus Mons, Mars

See tutorial in GRASSNews volume 1:

Global dataset of bathymetry and topography. GRASS Newsletter, 1:8-11, August 2004. ISSN 1614-8746.


Mars 3D Anaglyph

See also

  • Frigeri, A, Hare, T, Neteler, M., Coradini, A, Federico, C, Orosei, R. (2011). A research environment for digital planetary data processing and mapping using ISIS and GRASS GIS. Planetary and Space Science, 59(11-12), pp.1265-1272 [ DOI | PDF ]
these just define the simple reference ellipsoids, so dx=dy=dz=0.
GRASS currently uses the IAU2000 definitions in the ellipse.table.solar.system file.
  • iau2wkt: generates on the fly WKT descriptions from planetary bodies info