SRTM Water Body Data Watermask - by cartrite

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This is a water mask that uses the Shuttle Radar Topography Mission (SRTM)1 for coastlines north of 60 degrees latitude and south of 60 degrees latitude. More importantly, it uses the SRTM Water Body Data (SWBD)2 dataset that defines the water systems on our planet between 60 degrees north and 60 degrees south latitude. You should be able to see the northern boundary of the data in the image above. The southern boundary extends to the bottom of South America.

These images of the west and east are 8k previews of the data.

thumb-west-watermask.jpgthumb-east-watermask.jpgSince the SWBD was a byproduct of SRTM editing, this dataset is a highly accurate match to Blue Marble Next Generation (BMNG)3 datasets. It was created with the Geospatial Data Abstraction Library (GDAL)4 Utilities program, gdal_rasterize, which converted the Environmental Systems Research Institute (ESRI)5 shapefile format to raster format and scaled the data down from 30 meter resolution to 500 meter resolution using the nearest neighbor resampling method. The file, watermask.zip, contains a 86400x43200 8 bit binary file.

The file is designed to be used with the specmap tool from F-TexTools . A Windows installer is also available.

Here are some views while running Celestia.

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Links:

A readme file that describes exactly how this file was created.

The Watermask.zip file can be used with the specmap tool from the F-Tex toolkit.

F-TexTools-1.0pre4 can be found here.

A Windows installer for F-TexTools-1.0pre4.

Instructions for the use of F-TexTools can be found at Celestial Matters Forum

1. SRTM Shuttle Radar Topography Mission http://www2.jpl.nasa.gov/srtm/

2. SWBD SRTM Water Body Data ftp://e0srp01u.ecs.nasa.gov/srtm/version2/SWBD

3. BMNG Blue Marble Next Generation http://earthobservatory.nasa.gov/Newsroom/BlueMarble/

4. GDAL Geospatial Data Abstraction Library http://www.gdal.org/

5. ESRI Environmental Systems Research Institute http://www.esri.com/index.html

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