Effect of Grid Resolution and Terrain Characteristics on Data from DTM
Abstract
Previous work in digital terrain modeling (DTM) has shown that if regular gridded-data sets are used in the construction of the model, both the resolution of the gridded-data set and the characteristics of the terrain being modeled have an effect on the accuracy of digital terrain models. The main objective of this study is to test the hypothesis that both the resolution of the gridded-data set and the characteristics of the terrain being modeled have an effect on the accuracy of any derived data. To test this hypothesis, the terrain was classified in terms of its roughness. Various forms of data were derived from the terrain model; these include volumes, surface area, contours, and cross sections. The accuracy for each of these quantities was calculated by comparing them with values obtained from a control model. This research concluded that by both increasing the resolution of the regular gridded-data sets and varying the characeristics of the terrain, the accuracy of any derived data is affected.Citation
Journal of Computing in Civil Engineering, 15 (2): 137-143Publisher
American Society of Civil EngineersJournal
Journal of Computing in Civil EngineeringAdditional Links
http://www.ascelibrary.org/Type
Journal articleLanguage
enDescription
This work was undertaken in collaboration with WS Atkins Consulting Engineers.ISSN
08873801ae974a485f413a2113503eed53cd6c53
10.1061/(ASCE)0887-3801(2001)15:2(137)