Breytenbach, Andre2017-02-232017-02-232016-10Breytenbach, A. 2016. Comparative accuracy evaluation of fine-scale global and local digital surface models: The Tshwane Case Study I. In: ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume IV-2/W1, 2016, 11th 3D Geoinfo Conference, 20–21 October 2016, Athens, Greecehttp://www.isprs-ann-photogramm-remote-sens-spatial-inf-sci.net/IV-2-W1/211/2016/http://hdl.handle.net/10204/8975ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume IV-2/W1, 2016, 11th 3D Geoinfo Conference, 20–21 October 2016, Athens, GreeceConducted in the City of Tshwane, South Africa, this study set about to test the accuracy of DSMs derived from different remotely sensed data locally. VHR digital mapping camera stereo-pairs, tri-stereo imagery collected by a Pléiades satellite and data detected from the Tandem-X InSAR satellite configuration were fundamental in the construction of seamless DSM products at different postings, namely 2 m, 4 m and 12 m. The three DSMs were sampled against independent control points originating from validated airborne LiDAR data. The reference surfaces were derived from the same dense point cloud at grid resolutions corresponding to those of the samples. The absolute and relative positional accuracies were computed using well-known DEM error metrics and accuracy statistics. Overall vertical accuracies were also assessed and compared across seven slope classes and nine primary land cover classes. Although all three DSMs displayed significantly more vertical errors where solid waterbodies, dense natural and/or alien woody vegetation and, in a lesser degree, urban residential areas with significant canopy cover were encountered, all three surpassed their expected positional accuracies overall.enDigital surface modelsDSMRemote sensingSpatial informationConference PresentationBreytenbach, A. (2016). Comparative accuracy evaluation of fine-scale global and local digital surface models: The Tshwane Case Study I. ISPRS. http://hdl.handle.net/10204/8975Breytenbach, Andre. "Comparative accuracy evaluation of fine-scale global and local digital surface models: The Tshwane Case Study I." (2016): http://hdl.handle.net/10204/8975Breytenbach A, Comparative accuracy evaluation of fine-scale global and local digital surface models: The Tshwane Case Study I; ISPRS; 2016. http://hdl.handle.net/10204/8975 .TY - Conference Presentation AU - Breytenbach, Andre AB - Conducted in the City of Tshwane, South Africa, this study set about to test the accuracy of DSMs derived from different remotely sensed data locally. VHR digital mapping camera stereo-pairs, tri-stereo imagery collected by a Pléiades satellite and data detected from the Tandem-X InSAR satellite configuration were fundamental in the construction of seamless DSM products at different postings, namely 2 m, 4 m and 12 m. The three DSMs were sampled against independent control points originating from validated airborne LiDAR data. The reference surfaces were derived from the same dense point cloud at grid resolutions corresponding to those of the samples. The absolute and relative positional accuracies were computed using well-known DEM error metrics and accuracy statistics. Overall vertical accuracies were also assessed and compared across seven slope classes and nine primary land cover classes. Although all three DSMs displayed significantly more vertical errors where solid waterbodies, dense natural and/or alien woody vegetation and, in a lesser degree, urban residential areas with significant canopy cover were encountered, all three surpassed their expected positional accuracies overall. DA - 2016-10 DB - ResearchSpace DP - CSIR KW - Digital surface models KW - DSM KW - Remote sensing KW - Spatial information LK - https://researchspace.csir.co.za PY - 2016 T1 - Comparative accuracy evaluation of fine-scale global and local digital surface models: The Tshwane Case Study I TI - Comparative accuracy evaluation of fine-scale global and local digital surface models: The Tshwane Case Study I UR - http://hdl.handle.net/10204/8975 ER -