Naslov
Geomorphologic improvement of DTMs esepecially as derived from laser scanner data

Autori
Gajski, Dubravko

Izvornik
Geodetski vestnik (0351-0271) 44 (2000), 4; 390-405

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Laser scanner; DTM; water-flow analysis

Sažetak
Recent advances in laser-scanning techniques made it to a most attractive method of data acquisition for digital terrain modeling. This is due not only to the impressive level of automatization but also to the increasingly high density and precision of the points. Methods of filtering data in a preprocessing stage allow for interpolating a DTM very closely describing the terrain surface. Further improvement of the geomorphologic quality of the surface thus interpolated can be achieved by deriving structure line information of it and introducing it as constraints into a final step of interpolation. A raster type water flow analysis is described and applied, allowing to derive the structural information needed. The impact of these constraints is then considered. Applying the method as proposed to DTMs based on data acquisition techniques other than laser scanning may also be of advantage. A test area, a part of the Vienna Woods has been chosen. Water flow analysis is performed by SCOP.MATRIX within the frame of an alpha version of the SCOP_DTM_XX digital modeling system to come.

Izvorni jezik
Engleski

POVEZANOST RADA