Wikipedia:Graphics Lab/Resources/GIS sources and palettes: Difference between revisions
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NASA [[Shuttle Radar Topography Mission]] (SRTM) Digital Elevation Model. Including SRTM1 (1 arch-sec = 31m), SRTM3 (3 arch-sec = 93m), SRTM30 (30 arch-sec = 930m). [http://dds.cr.usgs.gov/srtm/version2_1/Documentation/SRTM_Topo.pdf Documentation], [http://www2.jpl.nasa.gov/srtm/ introduction]. WGS84/EGM96 geoid?
* {{Cite GIS |name= SRTM3 v2 |url_download= http://dds.cr.usgs.gov/srtm/version2_1/SRTM3 |publisher= NASA |year= 2000 |license= Public Domain |url_doc= http://dds.cr.usgs.gov/srtm/version2_1/Documentation/SRTM_Topo.pdf |layers= topography |precision_max= 93m (3"arch) |covered_area= 60⁰N-56⁰S (landmass only) |datum= WGS 84 |extensions= .zip → .hgt |size_compressed= ~2Mo each |size_uncompressed= ~4Mo each |tile_size= 1⁰ x 1⁰arch |tiles_total= ~20.000 |comment = perfect for small areas anywhere in the world. }}
: {{Cite GIS|name=SRTM3 v4 |url_download=http://srtm.csi.cgiar.org/SELECTION/inputCoord.asp |publisher=[[CGIAR]]-CSI |year= |license=Non commercial |url_doc=http://srtm.csi.cgiar.org/index.asp |layers=topography |precision_max=90m (3"arch) |covered_area= 60⁰N-56⁰S (landmass only) |datum=WSG 84 |projection= ? |extensions= .zip → .shp |size_compressed=~6Mo |size_uncompressed=~25Mo |tile_size=5⁰x5⁰arch |tiles_total= ~1,000 |comment= <u>Non commercial license not compatible with Wikipedia.</u> Perfect for small areas all around the world. Complex to manage (many tiles). nb: CGIAR-CSI = Consultative Group on International Agricultural Research, Consortium for Spatial Information.}}
* {{Cite GIS |name=SRTM1 v.2.1|url_download= http://dds.cr.usgs.gov/srtm/version2_1/SRTM1 |url_intro= |publisher=NASA |year=2000 |license=Public Domain |url_doc= http://dds.cr.usgs.gov/srtm/version2_1/Documentation/SRTM_Topo.pdf |url_doc= http://dds.cr.usgs.gov/srtm/version2_1/Documentation/SRTM_Topo.pdf
|layers=topography |precision_max=31m (1"arch) |covered_area=[http://dds.cr.usgs.gov/srtm/version2_1/SRTM1/Region_definition.jpg USA and dependencies] (landmass only) |datum=WGS 84 |projection = ? |extensions= .zip→.hgt |size_compressed= ~4Mo |size_uncompressed= ~30Mo |tile_size= 1⁰ x 1⁰arch |tiles_total= |comment = for mapmaking of the USA. File name from the lower-left corner's coordinates (ex: N48E001.hgt.zip) }}
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*16 files/tiles to cover the all the Earth (landmass)
*medium quality; unzipped landmass file is ~1.8GB
*U.S. Geological Survey (USGS) [http://eros.usgs.gov/#/Find_Data/Products_and_Data_Available/gtopo30_info GTOPO30]
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*NGDC [http://www.ngdc.noaa.gov/mgg/topo/globe.html GLOBE]
::Carte topographique mondiale développée à partir de deux sources, dont la GTOPO30 qui devrait donc être de meilleure qualité que cette dernière. Découpée en 16 fichiers compressés.
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