Digital terrain models (DTMs) generated using ground-based laser scanning provide high-resolution bare earth models of the terrain surface suitable for the geomorphological studies. Using the elevation models, features such as scarps, back-tilted slope units, lobate accumulation zones and irregular topography can be enhanced to allow delineation and classification of landslides. The study identified that a combination of shaded relief models and the application of slope, curvature and topographic roughness filters provided the optimum method for landslide mapping using the terrestrial DTM data. This chapter describes a case study on the application of terrestrial laser scanning to a complex landslide terrain in the United Kingdom and illustrates the use of the topographic filters for landslide identification. The output from the topographic filters has been compared to a field-based geomorphological map; the results show that terrestrial laser scanning can provide for rapid and very detailed geomorphological assessment of landslide terrains that is comparable in accuracy and detail to field-based mapping.
|Title of host publication||Geomorphological Mapping — Methods and Applications|
|Editors||M. Smith, P. Paron, J. Griffiths|
|Number of pages||16|
|Publication status||Published - 2011|
|Name||Developments in Earth Surface Processes|