Global Survey of Organized Landforms: Recognizing Linear Sand Dunes

P. L. Guth
Department of Oceanography, US Naval Academy
572C Holloway Rd, Annapolis MD 21402 USA
Telephone: 00-1-410-293-6560
Fax: 00-1-410-293-2137

The Shuttle Radar Topography Mission (SRTM) provided an unrivalled view of Earth's topography and a rich data set for geomorphometry (Farr et al. 2007). The 30" overview data set shows regional trends and can fit on a single CD-ROM, and the 3" local data set shows an incredible amount of detail with required storage of about 35 GB. The increasing availability of 1 meter Lidar topography highlights the possibility of looking at landscapes at a wide range of scales; SRTM provides the big and medium pictures for looking at the entire world or individual continents. Guth (2007) described the creation of a geomorphometric atlas from the 3" data. This paper will use that atlas to look at terrain organization, focusing on the identification of linear dune fields (Lancaster 1995).

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