How accurate is the Digital Surface Model presented in ATLAS?

The DSM is generated as part of the photogrammetry process, and its accuracy is primarily a function of the accuracy of the GPS altitude; we provide the DSM as a relative reference of elevation and can't make any guarantees about it's absolute accuracy.

It's relatively accurate over small areas and can be used to measure the height of a plant or tree above the surrounding terrain. It's not uncommon for the DSM to be biased from actual ground elevation or to have global trends from one side of a mosaic to another that aren't consistent with the actual topography.

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