Wikipedia:Graphics Lab/Resources/GIS sources and palettes: Difference between revisions

Revision as of 19:59, 13 June 2011

Revision as of 05:52, 14 June 2011

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SRTM: projection cylindrique équidistante (Lat/Lon) et le [[système géodésique]] [[WGS 84|WGS84]] : Source ???

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* {{Cite GIS |name=ETOPO1 |url_download=http://www.ngdc.noaa.gov/mgg/global/global.html |publisher=[[NGDC]]-[[NOAA]] |year=2009 |license= (?) NOAA license |url_doc=http://www.ngdc.noaa.gov/mgg/global/etopo1sources.html |layers=topography & bathymetry |precision_max=1850m (1minute arch) |covered_area= all Earth (90N-90S, landmass & sea floor) |datum=WSG 84 |projection = (?) |extensions=.zip → .tif and others |size_compressed=326Mo |size_uncompressed=900Mo |tile_size=180⁰ x 360⁰ |tiles_total= 1 |comment = Perfect for very large maps (ex: > France). nb: ETOPO1 is a better data than ETOPO2 (lower quality).}}

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. }}

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[http://www.ngdc.noaa.gov/mgg/global/global.html ETOPO1] ([[topography]]/[[bathymetry]])

* one file for all the Earth (landmass and water)

* low quality (1px = 1000x1000m); unzipped file is ~400MB–1.1GB, depending on the format

* convenient for large maps depicting areas greater than 1000km (~620mi) across

(not working) [http://www.ngdc.noaa.gov/mgg/topo/gltiles.html GLOBE] (topography)

*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.

(not working) [http://www.ngdc.noaa.gov/mgg/globaltopo/globalgltiles.html ETOPO1GLOBE] ([[topography]]/[[bathymetry]])

*16 onefiles/tiles fileto forcover the all the Earth (landmass and water)

*medium quality; unzipped landmass file is ~1.8GB

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