Publication details
Využití laserových modelů terénu v geomorfologickém výzkumu
| Title in English | Application of laser scanner terrain models in geomorphological research |
|---|---|
| Authors | |
| Year of publication | 2011 |
| Type | Article in Periodical |
| Magazine / Source | Geomorphologia Slovaca et Bohemica |
| MU Faculty or unit | |
| Citation | |
| Field | Earth magnetism, geography |
| Keywords | ground and airborne laser scanning - DTM - land form research application |
| Attached files | |
| Description | A high quality DTM can be provided by the laser scanning (LIDAR – Light Detection and Ranging). Main principles both the ground and airborne laser scanning of terrain are presented and discussed in the paper. While the ground application is useful for scanning relatively small terrain objects and earth constructions (especially for those with steep walls), the airborne laser scanning is efficiently applicable for large areas. The airborne laser scanning seems to be very useful for the construction of DTMs in densely built up areas, forested landscapes, terraced slopes, areas with dynamic terrain processes or flooded areas. The process of point cloud processing is depicted and the derivation both of the digital surface model (DSM) and digital terrain model described. The results of these processes are demonstrated on the example of the Svitava River valley (15 km to the north from the City of Brno, Czech Republic). The improved quality of a laser scanner DTM is visible in comparing with a classical DTM of the same area derived from a contour lines map. The DTM and the digital landscape cross section, both constructed using laser scanner data serve various land form studies. Possible efficient geomorphological applications of the detailed laser scanner DTM are listed by the end of the paper. The written text is accompanied with figures explaining principles of this technology and examples of 2D and 3D terrain model from the study territory. |