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Proceedings Paper

Validation of ALOS DSM
Author(s): Konstantinos G. Nikolakopoulos; Aristides D. Vaiopoulos
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Paper Abstract

One of the newest satellite sensors with stereo collection capability is ALOS. ALOS has a panchromatic radiometer with 2.5m spatial resolution at nadir. According to the specifications its extracted data will provide a highly accurate digital surface model (DSM). Panchromatic Remote-sensing Instrument for Stereo Mapping (PRISM) has three independent optical systems for viewing nadir, forward and backward producing a stereoscopic image along the satellite's track. Each telescope consists of three mirrors and several CCD detectors for push-broom scanning. The nadir-viewing telescope covers a width of 70km; forward and backward telescopes cover 35km each. Four areas with different physiographic and geomorphologic features were selected for the ALOS DSM validation. The ALOS DSMs were compared to elevation data from different sources: 1/50.000 topographic maps and airphoto stereo-pairs. Points of known elevation have been used to estimate the accuracy of the DSMs. 2D RMSE, correlation and the percentile value were computed and the results are presented. A new optimization method is proposed in order to ameliorate the accuracy of the DSMs. The first results are quite satisfactory.

Paper Details

Date Published: 26 October 2011
PDF: 11 pages
Proc. SPIE 8181, Earth Resources and Environmental Remote Sensing/GIS Applications II, 818103 (26 October 2011); doi: 10.1117/12.898382
Show Author Affiliations
Konstantinos G. Nikolakopoulos, Institute of Geology & Mineral Exploration (Greece)
Aristides D. Vaiopoulos, Univ. of Athens (Greece)


Published in SPIE Proceedings Vol. 8181:
Earth Resources and Environmental Remote Sensing/GIS Applications II
Ulrich Michel; Daniel L. Civco, Editor(s)

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