Tool Name	SRTM (CGIAR CSI)
Tool ID	1
Library ID	io_webservices
Version	1.0
Author(s)	O.Conrad (c) 2024

Description

This tool provides easy-to-use access to the 'NASA Shuttle Radar Topography Mission Global 3 arc second' elevation data (about 90 meter resolution) as provided by the CGIAR CSI server. It uses a local database in the chosen directory which provides the original tiles. If the tiles covering the requested area are not found in this directory the tool tries to download these from the CGIAR CSI server.

References

Jarvis A., H.I. Reuter, A. Nelson, E. Guevara (2008): Hole-filled seamless SRTM data V4. International Centre for Tropical Agriculture (CIAT). srtm.csi.cgiar.org

Reuter H.I, A. Nelson, A. Jarvis (2007): An evaluation of void filling interpolation methods for SRTM data. International Journal of Geographic Information Science, 21:9, 983-1008. doi:10.1080/13658810601169899

SRTM 90m DEM Digital Elevation Database

Parameters

Name	Type	Identifier	Description	Constraints
Input
Grid	grid, input	GRID
Shapes	shapes, input	SHAPES
Output
Grid	data object Grid, output, optional	RESULT
Options
Local Tiles Directory	file path	TILES	Download location for tiles. If requested tile is already present download will be skipped.
Delete Archive Files	boolean	DELARCHIVE	Do not keep archive files after download	Default: 1
Extent	choice	EXTENT		Available Choices: [0] user defined [1] shapes extent [2] grid system extent [3] grid system Default: 0
West	floating point number	XMIN		Default: 270360.000000
East	floating point number	XMAX		Default: 931320.000000
South	floating point number	YMIN		Default: 5225850.000000
North	floating point number	YMAX		Default: 6111540.000000
Buffer	floating point number	BUFFER	add buffer (map units) to extent	Minimum: 0.000000 Default: 0.000000
Cellsize	floating point number	CELLSIZE		Minimum: 0.000100 Default: 90.000000
Coordinate System Definition	text	CRS_STRING	Supported formats comprise PROJ and WKT strings, object codes (e.g. "EPSG:4326").