Validation of ALOS DSM

Konstantinos G. Nikolakopoulos; Aristides D. Vaiopoulos

doi:10.1117/12.898382

26 October 2011 Validation of ALOS DSM

Konstantinos G. Nikolakopoulos, Aristides D. Vaiopoulos

Proceedings Volume 8181, Earth Resources and Environmental Remote Sensing/GIS Applications II; 818103 (2011) https://doi.org/10.1117/12.898382
Event: SPIE Remote Sensing, 2011, Prague, Czech Republic

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.

Citation Download Citation

Konstantinos G. Nikolakopoulos and Aristides D. Vaiopoulos "Validation of ALOS DSM", Proc. SPIE 8181, Earth Resources and Environmental Remote Sensing/GIS Applications II, 818103 (26 October 2011); https://doi.org/10.1117/12.898382

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