DEM GENERATION USING ALOS PRISM STEREOCOPIC DATA (original) (raw)

Digital elevation Model (DEM) is a main source to produce contour map, slope and aspect information, which are needed for disaster management activities (such as: volcano and landslide). Digital Elevation Model (DEM) is generated from ALOS PRISM stereo data using image matching and collinear correlation based on Leica Photogrametry Suite (LPS) software. It needs Ground Control Point (GCP) or Control Point (CP) XYZ as input data. The main problem of the DEM generation is the difficulty to obtain the accurate field measurement GCP in many areas. Here, DEMs are generated from ALOS PRISM using field measurement GCPs and using CPs from IKONOS image (XY coordinat) and SRTM for (Z elevation). The accuracy of both DEMs are evaluated using another field measurement GCPs. The result shows that even the generated DEM using CPs has lower vertical accuracy comparing to the DEM using GCPs, but both DEMs have similar height pattern. IKONOS image (XY coordinat) and SRTM for (Z elevation) can be considered as good alternative CP source to generate DEM from ALOS PRISM stereo data.

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