Item: Using lidar (light distancing and ranging) data to more accurately describe avalanche terrain
Title: Using lidar (light distancing and ranging) data to more accurately describe avalanche terrain
Proceedings: International Snow Science Workshop, Davos 2009, Proceedings
Authors: Christopher M. McCollister1,2 and Robert H. Comey1,2 1Bridger-Teton National Forest Avalanche Center 2Jackson Hole Mountain Resort
Abstract: Currently, 30 meter Digital Elevation Models (DEM) and 1 meter color Digital Ortho Quads (DOQ) are available for most of the United States. These readily available spatial data lack the resolution to identify small starting zones, and smooth slope and aspect calculations for larger, identifiable slidepaths. In the summer of 2008, a LiDAR mission was flown for the southeastern Teton Range in northwest Wyoming, USA. One of the primary products of LiDAR data is very accurate and precise bare ground DEMs. This project yielded a 1 meter DEM, along with 15 cm color DOQs. This paper shows examples of raw LiDAR data and their products, which include shaded relief, slope, and aspect maps. The LiDAR data enables better definition of starting zones. Finally, the slope and aspect products are compared to those derived from 10 and 30 meter DEMs. Ultimately, these data create more detailed maps for archiving and displaying avalanche data.
Keywords: lidar, geographic information systems (gis), geographic information systems (gis)
Digital Abstract Not Available