An evaluation of DEM accuracy: elevation, slope, and aspect

Paul V. Bolstad, Timothy Stowe

Research output: Contribution to journalArticlepeer-review

167 Scopus citations

Abstract

The accuracy of elevations, slopes, and aspects were evaluated for two DEMs of an area centered on Blacksburg, Virginia, in the southern Appalachian Mountains. The first was a US Geological Survey (USGS) 7.5-minute quadrangle-based DEM with 30m postings, produced utilizing automated stereocorrelation of 140 000-scale leaf-off aerial photographs with a Gestalt Photomapper (GPM). The second DEM of the same area was produced from a SPOT panchromatic stereopair using a proprietary stereo-correlation technique developed by the STX corporation, among those used by SPOT Image Corp. for high resoultion DEM production. EM accuracy was assessed visually and through comparisons of DEM-derived to field-surveyed values for elevation, slope, and aspect. -from Authors

Original languageEnglish (US)
Pages (from-to)1327-1332
Number of pages6
JournalPhotogrammetric Engineering & Remote Sensing
Volume60
Issue number11
StatePublished - Dec 1 1994

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