HOWTO import SRTM elevation data - Revision history

⚠️Mmetz: /* Import of CGIAR SRTM void-filled tiles */ update the update

2017-09-24T21:46:23Z

Import of CGIAR SRTM void-filled tiles: update the update

← Older revision		Revision as of 21:46, 24 September 2017
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	== Import of CGIAR SRTM void-filled tiles ==		== Import of CGIAR SRTM void-filled tiles ==

			CGIAR SRTM is a heavily edited version of the original SRTM data. Differences to the original SRTM data can be substantial.

	* SRTM 90 data in GeoTIFF format are available from http://srtm.csi.cgiar.org/. These come in 5 degree by 5 degree tiles. Horizontal resolution: 3 arc second (90 m at equator). Coverage: world. Import with {{cmd\|r.in.gdal}}		* SRTM 90 data in GeoTIFF format are available from http://srtm.csi.cgiar.org/. These come in 5 degree by 5 degree tiles. Horizontal resolution: 3 arc second (90 m at equator). Coverage: world. Import with {{cmd\|r.in.gdal}}

	Update: note that NASA ~~EarthExplorer~~ (see on top of this page) offers ~~~ 30m~~ resolution SRTM V3 data which are void filled.		Update: note that [https://lpdaac.usgs.gov/dataset_discovery/measures/measures_products_table JPL/NASA] (see on top of this page) offers global 1 arc-second resolution SRTM V3 data which are void filled.

	== Import of multiple SRTM tiles in one step (mosaiking) ==		== Import of multiple SRTM tiles in one step (mosaiking) ==

⚠️Mmetz: /* Download */ update links

2017-09-24T21:41:32Z

Download: update links

← Older revision		Revision as of 21:41, 24 September 2017
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	== Download ==		== Download ==

	* Older SRTM: http://www2.jpl.nasa.gov/srtm/ (SRTM V1 + SRTM V2 home page) \| http://dds.cr.usgs.gov/srtm/ (SRTM V2 data download)		* Older SRTM: http://www2.jpl.nasa.gov/srtm/ (SRTM V1 + SRTM V2 home page) \| http://dds.cr.usgs.gov/srtm/ (JPL/NASA SRTM V1 + V2.1 data download)
	* https://lpdaac.usgs.gov/dataset_discovery/measures/measures_products_table NASA MEaSUREs Products (SRTM V3 and more)		* https://lpdaac.usgs.gov/dataset_discovery/measures/measures_products_table NASA MEaSUREs Products (SRTM V3 and more)
	: ([http://e4ftl01.cr.usgs.gov/SRTM/ ~~FTP] - therein SRTMGL3~~.003/2000.02.11/ ~~which is a huge file list)~~		: ([http://e4ftl01.cr.usgs.gov/SRTM/SRTMGL1.003/2000.02.11/ 1 arc-second] and [http://e4ftl01.cr.usgs.gov/SRTM/SRTMGL3.003/2000.02.11/ 3 arc-seconds] which are a huge file lists)
	* Map based search: [http://~~earthexplorer~~.usgs.gov/ ~~EarthExplorer] can be used to search, preview, and download Shuttle Radar Topography Mission (~~SRTM~~) 1 Arc~~-~~Second Global data. The collections~~ are ~~located under the Digital Elevation category.~~

	Note:		Note:

⚠️Mmetz: /* Available data */ update liinks

2017-09-24T21:35:53Z

Available data: update liinks

← Older revision		Revision as of 21:35, 24 September 2017
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	* [https://lta.cr.usgs.gov/SRTM NGA Version 2 - SRTM non-void filled], edited elevation data (spike and pit removal, water body leveling, and coastline definition). Available in the USGS long-term archive through the [http://earthexplorer.usgs.gov/ EarthExplorer].		* [https://lta.cr.usgs.gov/SRTM NGA Version 2 - SRTM non-void filled], edited elevation data (spike and pit removal, water body leveling, and coastline definition). Available in the USGS long-term archive through the [http://earthexplorer.usgs.gov/ EarthExplorer].
	* [https://lta.cr.usgs.gov/SRTMVF NGA Version 2 - SRTM partially void filled]. Available at 1 and 3 arc-seconds resolution in the USGS long-term archive through the [http://earthexplorer.usgs.gov/ EarthExplorer].		* [https://lta.cr.usgs.gov/SRTMVF NGA Version 2 - SRTM partially void filled]. Available at 1 and 3 arc-seconds resolution in the USGS long-term archive through the [http://earthexplorer.usgs.gov/ EarthExplorer].
	* JPL/NASA Version 2.1 corrects some minor errors found in the NGA SRTM Version 2 product ([https://dds.cr.usgs.gov/srtm/version2_1/SRTM1/ ~~US:~~ 1 arc-second] (approximately 30 meters); [https://dds.cr.usgs.gov/srtm/version2_1/SRTM3/ ~~global at~~ 3 arc-seconds] (approximately 90 meters))		* [https://dds.cr.usgs.gov/srtm/version2_1/ JPL/NASA Version 2.1] (non-void-filled) corrects some minor errors found in the NGA SRTM Version 2 product. Available for the US at [https://dds.cr.usgs.gov/srtm/version2_1/SRTM1/ 1 arc-second] (approximately 30 meters) and global at [https://dds.cr.usgs.gov/srtm/version2_1/SRTM3/ 3 arc-seconds] (approximately 90 meters).
	* '''JPL/NASA Version 3 SRTM global elevation data''' provide '''global coverage of completely void filled''' data at resolutions of [https://lpdaac.usgs.gov/dataset_discovery/measures/measures_products_table/srtmgl3_v003 3 arc-seconds] (approximately 90 meters) and [https://lpdaac.usgs.gov/dataset_discovery/measures/measures_products_table/srtmgl1_v003 1 arc-second] (approximately30 meters). The corresponding [https://lpdaac.usgs.gov/dataset_discovery/measures/measures_products_table/srtmswbd_v003 water body data] have also been updated.		* '''JPL/NASA Version 3 SRTM global elevation data''' provide '''global coverage of completely void filled''' data at resolutions of [https://lpdaac.usgs.gov/dataset_discovery/measures/measures_products_table/srtmgl3_v003 3 arc-seconds] (approximately 90 meters) and [https://lpdaac.usgs.gov/dataset_discovery/measures/measures_products_table/srtmgl1_v003 1 arc-second] (approximately30 meters). The corresponding [https://lpdaac.usgs.gov/dataset_discovery/measures/measures_products_table/srtmswbd_v003 water body data] have also been updated.

⚠️Mmetz: /* Available data */ update

2017-09-24T21:30:49Z

Available data: update

← Older revision		Revision as of 21:30, 24 September 2017
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	== Available data ==		== Available data ==

	[http://www2.jpl.nasa.gov/srtm/ Space Shuttle Radar Topography Mission] - several SRTM Data Products are available:		[http://www2.jpl.nasa.gov/srtm/ Space Shuttle Radar Topography Mission] - several SRTM Data Versions and Products are available. An overview of the different versions is given in figure 2 in the [https://lpdaac.usgs.gov/sites/default/files/public/measures/docs/NASA_SRTM_V3.pdf SRTM user guide].
	* ~~Original data~~ - SRTM ~~3 arc~~-~~seconds Non-Void Filled~~ elevation data V1 (US: 1 arc-second (approximately 30 meters); ~~outside the US~~ at 3 arc-seconds (approximately 90 meters))		* JPL/NASA Version 1 - SRTM non-void filled, unedited elevation data (US: 1 arc-second (approximately 30 meters); global at 3 arc-seconds (approximately 90 meters)). Available at [https://dds.cr.usgs.gov/srtm/version1/ https://dds.cr.usgs.gov/srtm/version1/].
	* SRTM ~~Void Filled~~ elevation data V2, filled the ~~voids using interpolation algorithms~~ in ~~conjunction with other sources of elevation data~~ (US: 1 arc-second (approximately 30 meters); ~~outside the US~~ at 3 arc-seconds (approximately 90 meters))		* [https://lta.cr.usgs.gov/SRTM NGA Version 2 - SRTM non-void filled], edited elevation data (spike and pit removal, water body leveling, and coastline definition). Available in the USGS long-term archive through the [http://earthexplorer.usgs.gov/ EarthExplorer].
	* '''SRTM ~~1 Arc-Second Global~~ elevation data''' ~~V3 offer worldwide coverage of~~ '''void filled''' data at ~~a resolution~~ of 1 arc-second (30 meters) ~~and provide open distribution of this high-resolution global~~ data ~~set~~.		* [https://lta.cr.usgs.gov/SRTMVF NGA Version 2 - SRTM partially void filled]. Available at 1 and 3 arc-seconds resolution in the USGS long-term archive through the [http://earthexplorer.usgs.gov/ EarthExplorer].
	** [http://earthexplorer.usgs.gov/ EarthExplorer] ~~can be used to search~~, ~~preview, and download Shuttle Radar Topography Mission (~~SRTM~~) 1 Arc-Second Global~~ data~~. The collections are located under the Digital Elevation category~~.		* JPL/NASA Version 2.1 corrects some minor errors found in the NGA SRTM Version 2 product ([https://dds.cr.usgs.gov/srtm/version2_1/SRTM1/ US: 1 arc-second] (approximately 30 meters); [https://dds.cr.usgs.gov/srtm/version2_1/SRTM3/ global at 3 arc-seconds] (approximately 90 meters))
			* '''JPL/NASA Version 3 SRTM global elevation data''' provide '''global coverage of completely void filled''' data at resolutions of [https://lpdaac.usgs.gov/dataset_discovery/measures/measures_products_table/srtmgl3_v003 3 arc-seconds] (approximately 90 meters) and [https://lpdaac.usgs.gov/dataset_discovery/measures/measures_products_table/srtmgl1_v003 1 arc-second] (approximately30 meters). The corresponding [https://lpdaac.usgs.gov/dataset_discovery/measures/measures_products_table/srtmswbd_v003 water body data] have also been updated.

			SRTM data available through the [http://earthexplorer.usgs.gov/ USGS EarthExplorer] are NGA SRTM version 2. If in doubt, use [https://lpdaac.usgs.gov/dataset_discovery/measures/measures_products_table JPL/NASA Version 3 SRTM global elevation data].

	== Download ==		== Download ==

Veroandreo: /* Import of SRTM tiles with reprojection on the fly */

2017-01-26T12:45:57Z

Import of SRTM tiles with reprojection on the fly

← Older revision		Revision as of 12:45, 26 January 2017
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	== Import of SRTM tiles with reprojection on the fly ==		== Import of SRTM tiles with reprojection on the fly ==

	Instead of processing SRTM in a different location, it can be imported right away into the location of interest (e.g. UTM or ~~whateer~~ other projection) through reprojecting on the fly with bilinear resampling using {{cmd\|r.import}}.		Instead of processing SRTM in a different location, it can be imported right away into the location of interest (e.g. UTM or whatever other projection) through reprojecting on the fly with bilinear resampling using {{cmd\|r.import}}.

	Example for North Carolina sample dataset with newest 1 arc-second for global coverage (~30 meters). You get the SRTM V3 1 arc-second global data from EarthExplorer (http://earthexplorer.usgs.gov/). The collections are located under the Digital Elevation category.		Example for North Carolina sample dataset with newest 1 arc-second for global coverage (~30 meters). You get the SRTM V3 1 arc-second global data from EarthExplorer (http://earthexplorer.usgs.gov/). The collections are located under the Digital Elevation category.

Neteler: +Import of SRTM tiles with reprojection on the fly

2016-05-16T08:04:30Z

+Import of SRTM tiles with reprojection on the fly

@@ Line 86: / Line 86: @@
 * M. Neteler, 2005. ''SRTM and VMAP0 data in OGR and GRASS.'' GRASS Newsletter, Vol.3, pp 2-6, June 2005. [ [http://grass.osgeo.org/newsletter/GRASSNews_vol3.pdf PDF] | [http://grass.osgeo.org/newsletter/GRASSNews_vol3_erratum.txt Erratum 1/2006 (txt)] ]
-Update 2014: better use the already void filled SRTM V3 data (get from NASA EarthExplorer, see above)
+''Update 2014'': better use the already void filled SRTM V3 1 arc-second for global coverage (~30 meters) data (get from NASA EarthExplorer, see above)
 == See also ==

Neteler: /* Void filling of original SRTM tiles */

2016-05-16T07:59:26Z

Void filling of original SRTM tiles

← Older revision		Revision as of 07:59, 16 May 2016
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	See:		See:
	* M. Neteler, 2005. ''SRTM and VMAP0 data in OGR and GRASS.'' GRASS Newsletter, Vol.3, pp 2-6, June 2005. [ [http://grass.osgeo.org/newsletter/GRASSNews_vol3.pdf PDF] \| [http://grass.osgeo.org/newsletter/GRASSNews_vol3_erratum.txt Erratum 1/2006 (txt)] ]		* M. Neteler, 2005. ''SRTM and VMAP0 data in OGR and GRASS.'' GRASS Newsletter, Vol.3, pp 2-6, June 2005. [ [http://grass.osgeo.org/newsletter/GRASSNews_vol3.pdf PDF] \| [http://grass.osgeo.org/newsletter/GRASSNews_vol3_erratum.txt Erratum 1/2006 (txt)] ]

			Update 2014: better use the already void filled SRTM V3 data (get from NASA EarthExplorer, see above)

	== See also ==		== See also ==

Neteler: /* Import of CGIAR SRTM void-filled tiles */

2016-05-16T07:58:37Z

Import of CGIAR SRTM void-filled tiles

← Older revision		Revision as of 07:58, 16 May 2016
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	* SRTM 90 data in GeoTIFF format are available from http://srtm.csi.cgiar.org/. These come in 5 degree by 5 degree tiles. Horizontal resolution: 3 arc second (90 m at equator). Coverage: world. Import with {{cmd\|r.in.gdal}}		* SRTM 90 data in GeoTIFF format are available from http://srtm.csi.cgiar.org/. These come in 5 degree by 5 degree tiles. Horizontal resolution: 3 arc second (90 m at equator). Coverage: world. Import with {{cmd\|r.in.gdal}}

			Update: note that NASA EarthExplorer (see on top of this page) offers ~ 30m resolution SRTM V3 data which are void filled.

	== Import of multiple SRTM tiles in one step (mosaiking) ==		== Import of multiple SRTM tiles in one step (mosaiking) ==

Neteler: mention SRTM 1 Arc-Second Global elevation data

2016-05-16T06:56:37Z

mention SRTM 1 Arc-Second Global elevation data

← Older revision		Revision as of 06:56, 16 May 2016
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	Background: [http://www2.jpl.nasa.gov/srtm/ Space Shuttle Radar Topography Mission]		Background: [http://www2.jpl.nasa.gov/srtm/ Space Shuttle Radar Topography Mission]

			== Available data ==

			[http://www2.jpl.nasa.gov/srtm/ Space Shuttle Radar Topography Mission] - several SRTM Data Products are available:
			* Original data - SRTM 3 arc-seconds Non-Void Filled elevation data V1 (US: 1 arc-second (approximately 30 meters); outside the US at 3 arc-seconds (approximately 90 meters))
			* SRTM Void Filled elevation data V2, filled the voids using interpolation algorithms in conjunction with other sources of elevation data (US: 1 arc-second (approximately 30 meters); outside the US at 3 arc-seconds (approximately 90 meters))
			* '''SRTM 1 Arc-Second Global elevation data''' V3 offer worldwide coverage of '''void filled''' data at a resolution of 1 arc-second (30 meters) and provide open distribution of this high-resolution global data set.
			** [http://earthexplorer.usgs.gov/ EarthExplorer] can be used to search, preview, and download Shuttle Radar Topography Mission (SRTM) 1 Arc-Second Global data. The collections are located under the Digital Elevation category.

	== Download ==		== Download ==

	* http://www2.jpl.nasa.gov/srtm/ (SRTM V1 + SRTM V2 home page)		* Older SRTM: http://www2.jpl.nasa.gov/srtm/ (SRTM V1 + SRTM V2 home page) \| http://dds.cr.usgs.gov/srtm/ (SRTM V2 data download)
	* http://dds.cr.usgs.gov/srtm/ (SRTM V2 data download)		* https://lpdaac.usgs.gov/dataset_discovery/measures/measures_products_table NASA MEaSUREs Products (SRTM V3 and more)
	* https://lpdaac.usgs.gov/~~products~~/measures_products_table NASA MEaSUREs Products (SRTM V3 and more)
	: ([http://e4ftl01.cr.usgs.gov/SRTM/ FTP] - therein SRTMGL3.003/2000.02.11/ which is a huge file list)		: ([http://e4ftl01.cr.usgs.gov/SRTM/ FTP] - therein SRTMGL3.003/2000.02.11/ which is a huge file list)
			* Map based search: [http://earthexplorer.usgs.gov/ EarthExplorer] can be used to search, preview, and download Shuttle Radar Topography Mission (SRTM) 1 Arc-Second Global data. The collections are located under the Digital Elevation category.

	Note:		Note:

Neteler: +FTP

2014-01-25T17:49:52Z

+FTP

← Older revision		Revision as of 17:49, 25 January 2014
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	* http://dds.cr.usgs.gov/srtm/ (SRTM V2 data download)		* http://dds.cr.usgs.gov/srtm/ (SRTM V2 data download)
	* https://lpdaac.usgs.gov/products/measures_products_table NASA MEaSUREs Products (SRTM V3 and more)		* https://lpdaac.usgs.gov/products/measures_products_table NASA MEaSUREs Products (SRTM V3 and more)
			: ([http://e4ftl01.cr.usgs.gov/SRTM/ FTP] - therein SRTMGL3.003/2000.02.11/ which is a huge file list)

	Note:		Note: