Dem 30m download

Social Media. Contact Us. About Us. Survey Manual. Key Officials. Careers and Employees. Doing Business. Emergency Management. What is a digital elevation model DEM? Where can I get global land cover data? What types of elevation datasets are available, what formats do they come in, and where can I download them? The absolute vertical accuracy of GDEM v3 was calculated by comparison with more than 23, independent reference geodetic ground control points from the U.

Because no single source of topographic information covered the entire land surface, GTOPO30 was derived from eight raster and vector sources that included a substantial amount of U. Defense Mapping Agency data. The qua. Kobrick, , Shuttle Radar Topography Mission produces a wealth of data.

Eos Trans. AGU, Farr, T. Remote Sens. Rosen, P. IEEE, Distributed by OpenTopography. Terrain Satellite Hybrid. Usage Heat Map. Validate coordinates and estimate area. Data Output Formats. Platform : Satellite Data. Full Metadata. European Space Agency, Sinergise Copernicus Global Digital Elevation Model. Distributed by OpenTopography. Terrain Satellite Hybrid. Usage Heat Map. Validate coordinates and estimate area.

Data Output Formats. ArcGIS until grid statistics have been calculated. IMG: Erdas Imagine. IMG a. A common raster format for geospatial imagery and topography.