Hi, I'm in the early stages of setting up a Mars WMS. I based my initial data set on - https://github.com/hrwgc/planets/blob/gh-pages/data/scripts/mars-mola-processing.sh ... I have successfully setup a service using EPSG 3785. The USGS uses EPSG 4326 in one of their Mars Web Map Servers, not the official Mars projection ...
https://planetarymaps.usgs.gov/cgi-bin/mapserv?map=/maps/mars/mars_simp_cyl.map&service=WMS&request=GetCapabilities ... so I it seems that its problematic to use the official Mars projection. My own experiments seem to confirm this as getting Geoserver to address the Mola DEM directly using the gdal plugin and adding the Mars SRS to a Geotiff leads to faulty display of the data in the Openlayers preview; I just get the bottom corner of a large B/W box at all scales. Apparently this is due to ... "IAU2000 defines Mars as an ellipse with a 3,396,190 m equatorial and a 3,376,200 m polar radius. The latitude is defined relative to the center of Mars (planetocentric). Terrestrial coordinate systems however (e.g. WGS84) commonly define the latitude relative to the surface (planetographic)." Quote from "PlanetServer: Innovative approaches for the online analysis of hyperspectral satellite data from Mars" - http://www.gispla.net/docs/OosthoekPlanetServer2013.pdf There's a discussion of the various Mars SRS's here ... "STANDARDS PROPOSAL TO SUPPORT PLANETARY COORDINATE REFERENCE SYSTEMS IN OPEN GEOSPATIAL WEB SERVICES AND GEOSPATIAL APPLICATIONS" - http://www.lpi.usra.edu/meetings/lpsc2006/pdf/1931 So I want to clarify if it would be possible to use the IAU 2000 projection for Mars - http://spatialreference.org/ref/iau2000/mars-2000/ for these reasons ... 1. It is the official Mars projection. 2. As far as I understand it there is some loss of detail doing re-projections to another SRS. The NASA Mola data is in the IAU Mars projection and I've been using gdal to warp it into a EPSG:3785 Geotiff. If it's not possible I can move on and just use the usual projections. Cheers ! Michael Z Freeman ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Geoserver-users mailing list Geoserver-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geoserver-users
