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- W2258431144 abstract "High resolution stereo satellite imagery is well suited for the creation of digital surface models (DSM). A system for highly automated and operational DSM and orthoimage generation based on CARTOSAT-1 imagery is presented, with emphasis on fully automated georeferencing. The proposed system processes level-1 stereo scenes using the rational polynomial coefficients (RPC) universal sensor model. The RPC are derived from orbit and attitude information and have a much lower accuracy than the ground resolution of approximately 2.5 m. In order to use the images for orthorectification or DSM generation, an affine RPC correction is required. This requires expensive and cumbersome GCP acquisition. In this paper, GCP are automatically derived from lower resolution reference datasets (Landsat ETM+ Geocover and SRTM DSM). The traditional method of collecting the lateral position from a reference image and interpolating the corresponding height from the DEM ignores the higher lateral accuracy of the SRTM dataset. Our method avoids this drawback by using a RPC correction based on DSM alignment, resulting in improved geolocation of both DSM and ortho images. Checks against independent ground truth indicate a lateral error of 5-6 meters and a height accuracy of 1-3 meters." @default.
- W2258431144 created "2016-06-24" @default.
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- W2258431144 date "2009-09-18" @default.
- W2258431144 modified "2023-10-18" @default.
- W2258431144 title "Automated Generation of DSM from Cartosat-1 Data for Remote Areas" @default.
- W2258431144 hasPublicationYear "2009" @default.
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