Title :
DTM extraction in urban areas: a detailed comparison of methodologies, algorithms and results
Author :
Casella, V. ; Zampori, B. ; Dell´Acqua, F. ; Gamba, P. ; Mainardi, A.
Author_Institution :
Dipt. di Ingegneria Edile e del Territorio, Universita di Pavia, Italy
Abstract :
In this paper we propose a comparison of the most important digital terrain model extraction techniques proposed in urban environments. In particular, we focus here on those based on digital signal processing applied to LIDAR data and on stereo photogrammetry. To this aim, we start from a data set composed by LIDAR and photo acquisitions over the town of Pavia, Northern Italy, and apply suitable DTM algorithms. Our investigation aims to provide a way to exploit both data sets. We were able to provide a complete DTM of Pavia with a very small degradation of the original measurements, as shown by a comparison with extremely precise ground control points
Keywords :
geography; optical radar; photogrammetry; radar signal processing; remote sensing by laser beam; stereo image processing; terrain mapping; DTM extraction; LIDAR data; Northern Italy; Pavia; digital signal processing; digital terrain model extraction; photo acquisitions; stereo photogrammetry; urban areas; Area measurement; Cities and towns; Data mining; Digital elevation models; Geometrical optics; Laser radar; Rivers; Signal processing algorithms; Surface emitting lasers; Urban areas;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2001. IGARSS '01. IEEE 2001 International
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-7031-7
DOI :
10.1109/IGARSS.2001.976719