Copy For Citation
Sefercik U. G., ALKAN M., Buyuksalih G., Jacobsen K.
PHOTOGRAMMETRIC RECORD, vol.28, no.144, pp.362-374, 2013 (SCI-Expanded)
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Publication Type:
Article / Article
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Volume:
28
Issue:
144
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Publication Date:
2013
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Doi Number:
10.1111/phor.12038
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Journal Name:
PHOTOGRAMMETRIC RECORD
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Journal Indexes:
Science Citation Index Expanded (SCI-EXPANDED), Scopus
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Page Numbers:
pp.362-374
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Yıldız Technical University Affiliated:
Yes
Abstract
WorldView-2 (WV-2), whose panchromatic images have a 05m ground sampling distance (GSD), was launched by DigitalGlobe in 2009. It is the first commercial satellite to offer 8-band multispectral imagery with 18m resolution. Due to the off-nadir sensor rotation of WV-2, it is feasible to obtain stereo coverage. Digital elevation models (DEMs) have been created with three WV-2 stereopairs of northern Istanbul with different land types and one of these is comprehensively analysed in this study. A reference DEM, developed from large-scale aerial photogrammetric mapping, together with a lidar DEM and an overlapping neighbouring WV-2 DEM, are used for validation. The generated WV-2 DEM reached, after filtering and in open areas, a standard deviation in height of approximately 10 GSD. A higher number of discrepancies larger than 4m exist than would be expected from a normal distribution, influencing the standard deviation more than the normalised median absolute deviation (NMAD).