sky-view factor as a relief visualization techniquesky-view因素作为救援可视化技术.pdfVIP

Remote Sens. 2011, 3, 398-415; doi:10.3390/rs3020398 OPEN ACCESS Remote Sensing ISSN 2072-4292 /journal/remotesensing Article Sky-View Factor as a Relief Visualization Technique Klemen Zakšek 1,2,*, Kristof Oštir 2,3 and Žiga Kokalj 2,3 1 Institute of Geophysics, University of Hamburg, Bundesstr. 55, D-20146 Hamburg, Germany 2 Centre of Excellence Space-SI, Aškerčeva cesta 12, SI-1000 Ljubljana, Slovenia 3 Institute of Anthropological and Spatial Studies, ZRC SAZU, Novi trg 2, SI-1000 Ljubljana, Slovenia; E-Mails: kristof.ostir@zrc-sazu.si (K.O.); ziga.kokalj@zrc-sazu.si (Z.K.) * Author to whom correspondence should be addressed; E-Mail: klemen.zaksek@zmaw.de; Tel.: +49-40-42838-4921; Fax: +49-40-42838-5441. Received: 4 January 2011; in revised form: 10 February 2011 / Accepted: 14 February 2011 / Published: 23 February 2011 Abstract: Remote sensing has become the most important data source for the digital elevation model (DEM) generation. DEM analyses can be applied in various fields and many of them require appropriate DEM visualization support. Analytical hill-shading is the most frequently used relief visualization technique. Although widely accepted, this method has two major drawbacks: identifying details in deep shades and inability to properly represent linear features lying parallel to the light beam. Several authors have tried to overcome these limitations by changing the position of the light source or by filtering. This