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ISPRS Int. J. Geo-Inf. 2018, 7(3), 118;

Validation of Pleiades Tri-Stereo DSM in Urban Areas

Foundation for Research and Technology, Institute of Applied and Computational Mathematics, Remote Sensing Laboratory, 700 13 Heraklion, Greece
Geosystems Hellas S.A., 144 52 Athens, Greece
Author to whom correspondence should be addressed.
Received: 4 January 2018 / Revised: 12 March 2018 / Accepted: 14 March 2018 / Published: 15 March 2018
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We present an accurate digital surface model (DSM) derived from high-resolution Pleiades-1B 0.5 m panchromatic tri-stereo images, covering an area of 400 km2 over the Athens Metropolitan Area. Remote sensing and photogrammetry tools were applied, resulting in a 1 m × 1 m posting DSM over the study area. The accuracy of the produced DSM was evaluated against measured elevations by a differential Global Positioning System (d-GPS) and a reference DSM provided by the National Cadaster and Mapping Agency S.A. Different combinations of stereo and tri-stereo images were used and tested on the quality of the produced DSM. Results revealed that the DSM produced by the tri-stereo analysis has a root mean square error (RMSE) of 1.17 m in elevation, which lies within the best reported in the literature. On the other hand, DSMs derived by standard analysis of stereo-pairs from the same sensor were found to perform worse. Line profile data showed similar patterns between the reference and produced DSM. Pleiades tri-stereo high-quality DSM products have the necessary accuracy to support applications in the domains of urban planning, including climate change mitigation and adaptation, hydrological modelling, and natural hazards, being an important input for simulation models and morphological analysis at local scales. View Full-Text
Keywords: tri-stereo; DSM; validation; urban surface morphology; line profile tri-stereo; DSM; validation; urban surface morphology; line profile

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Panagiotakis, E.; Chrysoulakis, N.; Charalampopoulou, V.; Poursanidis, D. Validation of Pleiades Tri-Stereo DSM in Urban Areas. ISPRS Int. J. Geo-Inf. 2018, 7, 118.

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