Digital elevation model download africa

Share sensitive information only on official, secure websites. Latest Earthquakes Chat Share. Free registration is required. DEMs are created from a variety of sources. It is important to note that the vertical accuracy actually varies significantly across the U. There is a separate site for The National Map Services. As sea levels rise around the planet, as storm surges threaten islands and coastal communities, decision makers face a lot of questions about how to Science Explorer.

Mission Areas. Unified Interior Regions. Science Centers. The others are a little obscure but not impossible to handle. The data can be accessed at:.

If anyone is having trouble let me know as a couple of my conversion utilities can ingest CDED. Its offerings were gradually curtailed over the year. After being completely taken down for years it is at least partially back. Although this remarkable data set is extremely useful due to its relatively high resolution, it suffers from several drawbacks.

The most significant is lack of coverage. The second is data quality. The user interface is not easy to navigate. And lastly is the file format. As a result, it takes more work than the casual user is willing to expend in order to use this data. Nevertheless, it is an extremely important data set and is expanding as more users request on-demand DEMs. See the article. This data is available at:.

STS99 extended a long boom and spent ten days mapping much of the earth's surface via overlapping radar imaging, producing the stereo pairs necessary for essentially worldwide DEM coverage. Much of this data was finally released to the public in and has rapidly moved to a position of prominence as a result of the extent of its coverage and superior resolution as compared to DTED0.

When the African continent data is released hopefully later this year, most of the earth's landmass will be mapped. Instead, the 30m data is averaged to 90m resolution. The data is in flat binary format and is extremely easy to read and write. Many applications can process this data. At this point the data set is not completely processed and has null data areas, but not as many as ASTER. Alaska Geospatial Data Clearinghouse.

Viewfinder Panoramas. Equador DEM Data. This 9 arc-second m DEM data is available from:. Since it is easy to screen capture the images, this may qualify as a free data source. Local bathymetry data is also available from widely disparate sources.

Check the NOAA web site but there appear to be tons of disparate sources. Mars Express Imagery Page. Mars Laser Altimetery Data. High Resolution Imaging Science Experiment. Mars Viking data may be obtained at thanks to a pointer from Tony Standley :. There are possibly a few other sources for free DEM data but I think I covered all the most useful types.

I would certainly welcome any pointers to additional free sources and will post them if received. World Wind Central. This is the best site for beginners.

Easy user interface, great true-color images in a friendly format jpg. How do I avoid this distortion? Could you help me on this? Here are some options for you. For crops, it really depends on the time of season, stage of growth and types of crops for any NDVI analysis.

Nice list, thanks for featuring OpenTopography. But do not know where I can download. Hi-does anyone here have a suggestion of software I can use to help bring out deep details in mountainous terrain? Thanx for the list. Its called DEM1. I like it so far in use with the Mapping-App OruxMaps. Thanks for nice overview!

However, I just discovered a serious mistake.. WorldDEM is the future. Your email address will not be published. Skip to content. After opening QGIS, we first need to extract the downloaded file, and import the.

Go to layer properties and click style. Notice the minimum and maximum value. These values are in meters. 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.