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Automated DSM based Georeferencing of CARTOSAT-1 Stereo Scenes

d'Angelo, Pablo and Schwind, Peter and Krauß, Thomas and Barner, Frithjof and Reinartz, Peter (2009) Automated DSM based Georeferencing of CARTOSAT-1 Stereo Scenes. In: International Archives of Photogrammetry and Remote Sensing (39), pp. 1-6. IPI-Workshop, 2.-5. Jun. 2009, Hannover, Deutschland.



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. The proposed method is part of an operational CARTOSAT-1 processor at Euromap GmbH for the generation of a high resolution European DSM. Checks against independent ground truth indicate a lateral error of 5-6 meters and a height accuracy of 1-3 meters.

Item URL in elib:https://elib.dlr.de/60014/
Document Type:Conference or Workshop Item (Speech)
Title:Automated DSM based Georeferencing of CARTOSAT-1 Stereo Scenes
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
d'Angelo, Pablopablo.angelo (at) dlr.deUNSPECIFIED
Schwind, Peterpeter.schwind (at) dlr.deUNSPECIFIED
Krauß, Thomasthomas.krauss (at) dlr.deUNSPECIFIED
Barner, Frithjofbarner (at) euromap.deUNSPECIFIED
Reinartz, Peterpeter.reinartz (at) dlr.deUNSPECIFIED
Date:2 June 2009
Journal or Publication Title:International Archives of Photogrammetry and Remote Sensing
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 1-6
Series Name:International Archives of Photogrammetry and Remote Sensing
Keywords:Georeferencing, Digital elevation models (DEM), Digital photogrammetry, Feature extraction, Stereo, CARTOSAT-1
Event Title:IPI-Workshop
Event Location:Hannover, Deutschland
Event Type:international Conference
Event Dates:2.-5. Jun. 2009
Organizer:Universität Hannover
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Bildwissenschaften (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Photogrammetry and Image Analysis
Deposited By: Angelo, Dr. Pablo
Deposited On:28 Sep 2009 13:09
Last Modified:31 Jul 2019 19:25

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