Download dem free

Your email address will not be published. Skip to content. Sure you do. Subscribe to our newsletter:. Thanks, and any advice on this would be greatly appreciated.

Thanks for the links! Hey, which source has latest DEM for Europe? I have tried USGS and the acquisition date is Can any one help me how to generate a good DEM of land and also crop? I want to download a 10 m resolution DEM for India. Can I get some suggestions for that. This is for version 1 and 2. For commercial access to the data, send requests to Andy Jarvis.

CIAT shall not be liable for incidental, consequential, or special damages arising out of the use of any data. Nelson, A. Recently published studies that used our SRTM data let us know if we missed yours! You must be logged in to post a comment. Skip to content Search for: Search Close. Close Menu. 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.

Processing was made on a void by void basis. In cases when a higher resolution auxiliary DEM was available, a point coverage is produced of the elevation values at the center of each cell of the auxiliary DEM within void areas. This process interpolates through the no-data holes, producing a smooth elevational surface where no data was originally found. For areas without a high-resolution auxiliary DEM: 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.

The best interpolations methods can be generalised as Kriging or Inverse Distance Weighting interpolation for small and medium-size voids in relatively flat low-lying areas; Spline interpolation for small and medium-sized voids in high altitude and dissected terrain; Triangular Irregular Network or Inverse Distance Weighting interpolation for large voids in very flat areas, and an advanced Spline Method ANUDEM for large voids in other terrains.

The interpolated DEM for the no-data regions is then merged with the original DEM to provide continuous elevational surfaces without no-data regions. 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. In render type dropdown select singleband pseudocolor and click classify. Now we will extract contours from this image. You may also be interested in QGIS tutorial. Now you can easily analyze the surface by seeing the contour map.

Hope this tutorials helped you. If you want to share some suggestion or want to ask some question do comment below. Digital Elevation Model DEM is a raster image that holds z values, it is used widely during the analysis process where surface height value are important.

As everybody is aware that Z or elevation values are expensive to obtain, so I have listed few places on internet where you can download the world DEM data for free. It covered 80 percentage of world surface with a 90 meters global resolution excluding USA whose resolution was 30 meters. Later on October 11th, versions 2 was released which has major improvement upon the version 1. On February special modified radar flew for 11 day using two antennas and a single pass. Source for much of World Wind data.

You will have to do some digging to get anything out of this one. Coverage is not yet complete but presumably this will be increasing as Natural Resources Canada completes the collection. Digital Topographic Map Library. Stanford University Libraries and Academic Resources.

This is not actually a source of topographic maps, but is instead one of the most comprehensive listing of USA state mapping and GIS agencies. These agencies are often the best source of not only free USGS topographic maps for their state, but often also for tons of other valuable data like DOQQs, tax plats, etc. The University of Oregon site is one of the best listings. UC Berkeley Map Library. Free Russian topos! For all you non-USA cartographers looking for free topos, this site may help.

Very incomplete world coverage and not all of the collection is available on line. However this is one of the only free sources of Russian topos on the internet, and certainly the largest. Doc Savage Archeology Site. This guy is a real-life Indiana Jones who has spent a good chunk of his life conducting archeological studies in Israel and Jordan. Plenty of very interesting information on his site, including a fine collection of Middle East topographic maps that you can download.

Very limited coverage, but excellent source of very unusual maps, including topos published by the Royal Jordanian Geographic Centre.

The maps are offered in several formats, including with and without collars. See the 'Lavant Topos' link. Air navigation charts for much of Asia. Jim Henthorn's Project MapScan. Awesome, awesome, awesome collection of scanned topographical maps for all of Southeast Asia. Veteran Jim Henthorn has done an outstanding piece of work.

Check this out, it is awesome. Lemkos Poland. Expidice Hindukus. Some excellent mountaineering maps for Pamir and Hindu Kush ranges. Czech language. Austrian Map Online.