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Preparing an urban test site for SRTM data validation

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2 Author(s)
Dell'Acqua, F. ; Dipt. di Elettronica, Pavia Univ., Italy ; Gamba, P.

In this paper, we describe a method to obtain a reliable set of elevation data suitable for data validation on the Shuttle Radar Topography Mission (SRTM), starting from laser scanning measurements on an urban test site: Pavia, Northern Italy. The elevation dataset is obtained through extraction of digital terrain models. The source digital surface model is first filtered by means of a lowpass or morphological kernel. Then, buildings are suppressed through analysis of the height histogram. Finally, a lowpass filter suppresses the surviving elevation artifacts. We show that, starting from a digital surface model at 1-m ground resolution, we end up with a digital terrain model that can be used as a ground truth for SRTM topographic analysis of an urban area.

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Geoscience and Remote Sensing, IEEE Transactions on  (Volume:40 ,  Issue: 10 )