GeoTIFF is a standard for storing georeferencing and geocoding information in a TIFF 6.0 compliant raster file. TIFF (Tagged-Image File Format) is a public-domain, platform-independent file format created by Aldus-Adobe for storing raster data and ancillary information in a single file. Ancillary information is encoded in a TIFF file using a flexible mechanism called tags, and GeoTIFF uses a standardized set of tags to encode georeferencing information for the raster data in the file. The GeoTIFF standard accommodates multi-band imagery as well as single-band DEMs. GeoTIFF was developed through something of a grass roots effort beginning in the early nineties as a non proprietary and vendor- and platform-independent format for georeferenced imagery.
NOTE: GeoTIFF DEMs are not yet common. RiverTools only supports GeoTIFF DEMs which use the UTM projection or Geographic coordinates.
There is no single source of GeoTIFF data. However, several
organizations are or soon will be providing data in the GeoTIFF
format/standard. A partial list can be found at:
See comments for Data Source.
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