![]() Source resolution DEMs: these data are the original bare earth DEMs derived from lidar point cloud source. Distinctions in nominal pulse spacing are provided in the lidar point cloud status graphics and in the download platform however, other qualities such as vertical accuracy must be examined to determine if the data meet particular 3DEP quality level specifications. ![]() Most of the data collected in 2014 and later meet 3DEP specifications for quality level 2 nominal pulse spacing and vertical accuracy, and data collected prior to 2014 often do not meet the quality level 2 specification. Lidar point cloud: These data are the foundational data for 3DEP in the conterminous U.S., and contain the original three-dimensional information from which the DEM products are derived. ![]()
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