View source for NASA-DEM

[[Category: Online Data]][[Category: Digital Elevation Models]]
[[Image:NASADEM_Midtfjellet_Norway.png|right|thumb|350px|NASADEM Data in WindPRO - Midtfjellet, Norway.]]
[[Image:SRTMBoomGeometry.png|right|thumb|350px|SRTM InSAR Antenna Boom Geometry. Image credit: NASA.]]
== Introduction ==
In early 2020, a global elevation model with improved digital elevation data was released by NASA through its NASADEM dataset. NASA has re-visited the telemetry data obtained by the original Shuttle Radar Topography Mission (SRTM). This data was obtained by the space shuttle Endeavour during the STS-99 mission that flew 11 days during February 2000. This original telemetry data has been re-processed with improved algorithmns and any missing (void) areas has been pacthed with better data sources, such as ASTER, ICEsat and ASTER and national models. The result is a much improved dataset over the original SRTM dataset and at 1 arc-second resolution. A quality mask is available so the source of data is easily determined. Coverage is all land masses between 60N and 65S — this corresponds to 80% of the Earths land mass. This dataset was produced by NASA - the National Aeronautics and Space Administration of the United States of America. 

=== Dataset Overview ===
* '''Spatial Coverage:''' Near global - coverage is most of land bodies on earth between degrees 60N and 65S.
* '''Resolution:''' 1 arc-second (approximately 30m)
* '''Data-type:''' [[:Category%3ADigital_Elevation_Models#What_type_of_elevation_model.3F_DEM.2C_DSM_and_DTM.3F|Digital Surface Model (DSM)]]
* '''Coordinate system (horizontal):''' Geographic WGS (EPSG:4326)
* '''Coordinate system (vertical):''' EGM96 geoid
* '''Version:''' WindPRO holds the 1.0 version of the NASADEM data
* '''Vertical Accuracy:''' See below - section 'Accuracy of NASADEM'.