All are produced from a seamless dataset to allow easy mosaicing. This method produces a smooth elevational surface of no-data regions. If someone can recover the original x-y-z values from the new product, then that new product can NOT be re-distributed. Because there are known inaccuracies and artifacts in the data set, please use the product with awareness of its limitations. A 1 arc second data product was also produced, but is not available for all countries. srtm 10m dem

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Because there are known inaccuracies and artifacts in the data set, please use the product with awareness of its limitations. CIAT have processed this data to provide seamless continuous topography surfaces. Access to srfm data is governed by the draft delegated regulation on Copernicus data ertm information policy, as approved by the EC on 12th of Julyand in the process of decision making by the Council and European Parliament.

Flyover movies may be re-distributed if the final product is produced in a format that will not allow the recovery of the original data e. This entire process is performed for tiles with the large overlap with neighboring tiles, thus ensuring seamless and smooth transitions in topography in large void areas.

This requires both the registration of users, and restrictions on redistribution, to capture the intended use in terms of the GEOSS themes. Two examples at the national level in Peru. The most appropriate interpolation technique is selected based on void size and landform typology, and applied on the data immediately surrounding the hole, using SRTM30 derived points inside the hole should it be of a certain size or greater.

Digital elevation models DEM for the entire globe, covering all of the countries of the world, are available for download on this site.

All are produced from a seamless dataset to allow easy mosaicing.

The SRTM data is available as 3 arc second approx. Processing was made on a void by void basis. Data can be downloaded using a browser or accessed directly from the ftp site.

DEM - Global elevation data

The interpolated DEM for the no-data regions is then merged with the original DEM to provide continuous elevational surfaces without no-data regions.

Transforming the data from GeoTIFF format to ESRI format Mosaicking or subsetting the data at the native 1 arc-second or better resolution to serve up areas different than the original 1x1 degree tiles. Calculation of hydrologically sound digital elevation models. Where that data or information has been adapted or modified, the user shall clearly state this. Comparisons with digital elevation models generated from cartographic data.

A written confirmation has been provided to www. Version 2 has the shorelines clipped. Practical use of SRTM data in the tropics: The SRTM digital elevation data, produced by NASA originally, is a major breakthrough in digital mapping of the world, and provides a major advance in the accessibility of high quality elevation data for large portions of the tropics and other areas of the developing world.

We would like to thank the colleagues in the Land Management and Natural Hazards Unit and the Global Environmental Monitoring unit for their support to provide this data. The original open data license is mentioned bellow. For the United States, data was made available at 1-arc second resolution approximately 30m at the equatorbut for the rest of the world, the 1-arc second product is degraded to 3-arc seconds approximately 90m at the equator.

DEM - Global elevation data. Decisions on how data will be released will be made on a case-by-case basis.

The DEM files have been mosaiced into a seamless near-global coverage up to 60 degrees north and southand are available for download as 5 degree x 5 degree tiles, in geographic coordinate system — WGS84 datum. When distributing or communicating Copernicus data and information to the public, users shall inform the public of the source of that data and information. Version History Change from Version 3 to Version 4 Version 4 uses a number of interpolations techniques, described by Reuter et al.

Users should acknowledge CIAT as the source used in the creation of any reports, edm, new datasets, derived products, or services resulting from the use of this dataset.

In cases when a higher resolution auxiliary DEM was deem, a point coverage is produced of the elevation values at the center of each cell of the auxiliary DEM within void areas.

Known issues and future improvements We plan to continue improving the data as and when high-resolution auxiliary datasets become available.