On the Use of Multispectral and Stereo Data from Airborne Scanning Systems for Dtm Generation and Landuse Classification
نویسندگان
چکیده
Airborne pushbroom systems for the direct acquisition of digital imagery enable the simultaneous capture of high quality 3D and multispectral information of a scene. The combination of geometric and radiometric information should improve tasks like DTM generation – usually solely based on stereo imagery – and landuse classification, which is traditionally restricted to the interpretation of spectral information. Within this paper these assumptions are confirmed utilizing datasets of the DPA (Digital Photogrammetric Assembly), a scanning airborne sensor which records simultaneously high spatial resolution stereo and multispectral image. Since the surface reconstruction and ortho image generation from airborne scanner imagery, which is a prerequisite for the proposed approach is different to standard procedures using full frame images, this process will be described in the first part of the paper. Afterwards the benefits of a combined evaluation of stereo and multispectral data will be demonstrated for two tasks, the generation of Digital Terrain Models and the landuse classification for thematic mapping.
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