Title :
Validation of DEMs derived from radar interferometry, airborne laser scanning and photogrammetry by using GPS-RTK
Author :
Chang, Hsing-Chung ; Ge, Linlin ; Rizos, Chris ; Milne, Tony
Author_Institution :
Sch. of Surveying & Spatial Inf. Syst., New South Wales Univ., Sydney, NSW, Australia
Abstract :
A high resolution digital elevation model (DEM) enables easy derivation of subsequent information for various applications. This work uses real-time kinematic (RTK) GPS to examine the quality of some DEMs generated by such means as radar interferometry (InSAR), airborne laser scanning (ALS) and photogrammetry. The preliminary results show that a DEM generated from ALS has the highest accuracy with a RMS error of 0.09 ∼ 0.3 m. The RMS errors of DEMs derived by photogrammetric and radar interferometric techniques are 1.03 ∼ 3.75m and 4.26 ∼ 27.81 m respectively.
Keywords :
Global Positioning System; geophysical techniques; photogrammetry; radiowave interferometry; remote sensing by laser beam; remote sensing by radar; synthetic aperture radar; InSAR; RMS error; airborne laser scanning; digital elevation model; interferometric synthetic aperture radar; photogrammetry; radar interferometry; real-time kinematic GPS; Digital elevation models; Geographic Information Systems; Global Positioning System; Laser radar; Production; Radar detection; Radar interferometry; Surface morphology; Surface topography; Synthetic aperture radar interferometry;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2004. IGARSS '04. Proceedings. 2004 IEEE International
Print_ISBN :
0-7803-8742-2
DOI :
10.1109/IGARSS.2004.1370277
