Abstract

Geomorphometric Accuracy Assessment, 'A Comparative Approach'
Track: Lidar and 3D Mapping
Authors: john radke, Reza Ghezelbash

This study assesses and estimates the accuracy of three major elevation datasets, including: 1/3 Arc Second (10 m) National Elevation Data (NED); the 1 Arc Second NASA/JAXA Advanced Space-borne Thermal Emission Radiometer-Global Digital Elevation Model version 2 (ASTER GDEM2); and, 1 Arc Second (30 m) NASA/USGS Shuttle Radar Topography Mission (SRTM), in comparison to the 1 meter spatial resolution LIDAR altimetry datasets provided by the county of Contra Costa, CA. The study area is a sub basin of the larger Danville watershed, located at the piedmont of Mt. Diablo, CA, an area of approximately 7 by 7km.

The aggregated land cover classes of the area of study include 4 major categories: rugged terrain, plateau, residential/urban and woodland.

The original LIDAR datasets have a mixture of 3 by 3 inch and 6 by 6 inch tile size.