A comparison of digital elevation models generated from different data sources

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dc.contributor.author Rayburg, SC
dc.contributor.author Thoms, M
dc.contributor.author Neave, M
dc.date.accessioned 2010-06-16T04:57:49Z
dc.date.issued 2009-01
dc.identifier.citation Geomorphology, 2009, 106 (3-4), pp. 261 - 270
dc.identifier.issn 0169-555X
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
dc.publisher Elsevier
dc.relation.isbasedon 10.1016/j.geomorph.2008.11.007
dc.subject Landscape complexity, Floodplain-wetland ecosystems, Dryland, LiDAR, Narran ecosystem, Geography
dc.subject Landscape complexity; Floodplain-wetland ecosystems; Dryland; LiDAR; Narran ecosystem; Geography
dc.title A comparison of digital elevation models generated from different data sources
dc.type Journal Article
dc.parent Geomorphology
dc.journal.volume 3-4
dc.journal.volume 106
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 0406 Physical Geography and Environmental Geoscience
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
dc.description.keywords Landscape complexity
dc.description.keywords Floodplain-wetland ecosystems
dc.description.keywords Dryland
dc.description.keywords LiDAR
dc.description.keywords Narran ecosystem
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
pubs.organisational-group /University of Technology Sydney/Faculty of Science/School of the Environment


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