Vertical accuracy of the USGS 3DEP program data: study cases in Fresno County and in Davis, California

3D Elevation Program (3DEP) aims to generate and disseminate high-resolution topographic elevation data from the source products including lidar point clouds, original DEMs which 3DEP standard DEM datasets were produced, additional types produced IfSAR collections. As such, accuracy of varies due inconsistent quality data. Hence, in order test vertical current data, two precise leveling sets are collected San Joaquin Experimental Range (SJER) Fresno County CalFire site Davis, California used as baselines differences computed. In earlier studies, assessment is accomplished using large-area datasets. Nevertheless, these not differential (precise) sets. this study, relatively small sites (SJER site) surveyed utilizing leveling. These project also differ each other terms terrain relief land cover. The results show that attainable precision almost same for 1/3 arc-second 1 more than SJER site. accurate provides good information Terrain cover important factors on coming