I noticed earlier last week that I just missed the 25th anniversary of the mission of the Shuttle Radar Topography Mission aboard STS-99. I’m not sure there has been a more important elevation data product that has been released to the public than SRTM.
Given the uncertainty of funding for government programs in the new Trump administration, I’m not sure we’ll see another public 3D dataset in my time. Sure, there are private companies who collect much more detailed elevation data than SRTM, but none are as freely available as SRTM is (hopefully not was).
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