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Automated Generation of DSM from Cartosat-1 Data for Remote Areas

Reinartz, Peter and d'Angelo, Pablo (2009) Automated Generation of DSM from Cartosat-1 Data for Remote Areas. In: auf CD-ROM. HEIARA 2009, 18.-20. Sept. 2009, Alisha League, China.

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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.

Item URL in elib:https://elib.dlr.de/57435/
Document Type:Conference or Workshop Item (UNSPECIFIED)
Title:Automated Generation of DSM from Cartosat-1 Data for Remote Areas
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Reinartz, PeterUNSPECIFIEDUNSPECIFIED
d'Angelo, PabloUNSPECIFIEDUNSPECIFIED
Date:18 September 2009
Journal or Publication Title:auf CD-ROM
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:DSM, Optical Stereo Data, Image Matching, Automatic Referencing
Event Title:HEIARA 2009
Event Location:Alisha League, China
Event Type:Workshop
Event Dates:18.-20. Sept. 2009
Organizer:Chinese Academy for Surveying and Mapping (CASM)
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 - no assignment (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Photogrammetry and Image Analysis
Deposited By: Reinartz, Prof. Dr.. Peter
Deposited On:29 Sep 2009 11:40
Last Modified:29 Sep 2009 11:40

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