Great Sand Dunes DEM

Version 1.0, July 3, 2020

Prepared by Tom Patterson, US NPS (retired)

Resolution (meters)


Size (height samples)

5,300 x 5,300



Zone 13N

Data Source

USGS 3D Elevation Program (3DEP).

Data processing

Data processing occurred in Natural Scene Designer Pro and QGIS software and involved converting between NSD, ASCII Grid, and TIF formats. We transformed the DEM from the Geographic to the UTM projection in Natural Scene Designer Pro using bicubic interpolation. No downsampling or filtering was applied.

Data issues

An east-west data seam exists at 37.750106N.  A north-south data seam exists at 105.4998254W


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