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SRTM – Shuttle Radar Topography Mission

On 23 September 2014, the White House announced that the highest-resolution topographic data generated from NASA‘s that is Shuttle Radar Topography Mission (SRTM), it was released globally by late 2015.

The Shuttle Radar Topography Mission is elevation data on a near-global scale, acquired from the Space Shuttle, to generate the most complete high-resolution digital topographic database of Earth.

SRTM data have been enhanced to fill areas of missing data to deliver Digital Elevation data with a resolution of 1 arc-second for global range.

Alaska SRTM Data image
Alaska SRTM Image

SRTM Data Products

3 types of data Products;

  • 1 Arc-Second Global

1 Arc-Second Global elevation data offer worldwide coverage of void filled data at a resolution of 1 arc-second (30 meters) and provide open distribution of this high-resolution global data set.

  • Void Filled

Void Filled elevation data are the result of additional processing to address areas of missing data.This data is 1 arc-second for the United States and 3 arc-seconds for global coverage.

  • Non-Void Filled

Non-Void Filled elevation data were processed from C-band radar signals spaced at intervals of 1 arc-second at NASA’s Jet Propulsion Laboratory (JPL)

SRTM Data Download

Many sources are available to download SRTM Data. Top 3 sources:

  1. JPL – NASA (SRTM)
  2. USGS Earth Explore
  3. OpenDEM

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