A comparison of digital elevation models generated from different data sources

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dc.contributor.author Rayburg, Scott en_US
dc.contributor.author Thoms, Martin en_US
dc.contributor.author Neave, Melissa en_US
dc.contributor.editor en_US
dc.date.accessioned 2010-06-16T04:57:49Z
dc.date.available 2010-06-16T04:57:49Z
dc.date.issued 2009 en_US
dc.identifier 2008003112 en_US
dc.identifier.citation Rayburg Scott, Thoms Martin, and Neave Melissa 2009, 'A comparison of digital elevation models generated from different data sources', Elsevier, vol. 106, no. 3-4, pp. 261-270. en_US
dc.identifier.issn 0169-555X en_US
dc.identifier.other C1 en_US
dc.identifier.uri http://hdl.handle.net/10453/11794
dc.description.abstract It can be challenging to accurately determine the topography of physically complex landscapes in remote areas. Ground-based surveys can be difficult, time consuming and may miss significant elements of the landscape. This study compares digital elevation models (DEMs) generated from three different data sources, of the physically complex Narran Lakes Ecosystem, a major floodplain wetland ecosystem in Australia. Topographic surfaces were generated from an airborne laser altimetry (LiDAR) survey, a ground-based differential GPS (DGPS) survey containing more than 20,000 points, and the 9? DEM of Australia. The LiDAR- and DGPS-derived data generated a more thorough DEM than the 9? DEM; however, LiDAR generated a surface topography that yielded significantly more detail than the DGPS survey, with no noticeable loss of elevational accuracy. Both the LiDAR- and the DGPS-derived DEMs compute the overall surface area and volume of the largest floodplain lake within the system to within 1% of each other. LiDAR is shown to be a highly accurate and robust technique for acquiring large quantities of topographic data, even in locations that are unsuitable for ground surveying and where the overall landscape is of exceptionally low relief. The results of this study highlight the potential for LiDAR surveys in the accurate determination of the topography of floodplain wetlands. These data can form an important component of water resource management decisions, particularly where environmental water allocations for these important ecosystems need to be determined en_US
dc.language en_US
dc.publisher Elsevier en_US
dc.relation.isbasedon http://dx.doi.org/10.1016/j.geomorph.2008.11.007 en_US
dc.title A comparison of digital elevation models generated from different data sources en_US
dc.parent Geomorphology en_US
dc.journal.volume 106 en_US
dc.journal.number 3-4 en_US
dc.publocation London, UK en_US
dc.identifier.startpage 261 en_US
dc.identifier.endpage 270 en_US
dc.cauo.name SCI.Environmental Sciences en_US
dc.conference Verified OK en_US
dc.for 040600 en_US
dc.personcode 105490 en_US
dc.personcode 0000047981 en_US
dc.personcode 0000047980 en_US
dc.percentage 100 en_US
dc.classification.name Physical Geography and Environmental Geoscience en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US
dc.date.activity en_US
dc.location.activity en_US
dc.description.keywords Landscape complexity; Floodplain-wetland ecosystems; Dryland; LiDAR; Narran ecosystem en_US

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