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Towards Automated DEM Generation from High Resolution Stereo Satellite Images

d'Angelo, Pablo and Lehner, Manfred and Krauss, Thomas and Hoja, Danielle and Reinartz, Peter (2008) Towards Automated DEM Generation from High Resolution Stereo Satellite Images. In: The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, International Society for Photogrammetry and Remote Sensing, XXXVII (B4), pp. 1137-1342. ISPRS Conference 2008, 2008-07-03 - 2008-07-11, Peking (China). ISSN 1682-1750

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Abstract

High resolution stereo satellite imagery is well suited for the creation of digital surface models (DSM). In this paper, a system for highly automated DSM and orthoimage generation based on CARTOSAT-1 imagery is presented. The proposed system processes photometrically corrected 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. Ground control points are used to estimate affine RPC correction. Accurate GCP are not always available, especially for remote areas and large scale reconstruction. In this paper, GCP are automatically derived from lower resolution reference images (Landsat ETM+ Geocover and SRTM DSM). It is worthwhile to note that SRTM has a much higher lateral accuracy than the Landsat ETM+ mosaic, which limits the accuracy of both DSM and orthorectified images. Thus, affine RPC correction parameters are estimated by aligning a preliminary DSM to the SRTM DSM, resulting in significantly improved geolocation of both DSM and orthoimages. Robust stereo matching and outlier removal techniques and prior information such as cloud masks are used during this process. DSM with a grid spacing of 10 m are generated for 9 CARTOSAT-1 scenes in Catalonia. Checks against independent ground truth indicate a lateral error of 3-4 meters and a height accuracy of 4-5 meters. Independently processed scenes align at subpixel level and are well suited for mosaicing.

Item URL in elib:https://elib.dlr.de/55978/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Towards Automated DEM Generation from High Resolution Stereo Satellite Images
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
d'Angelo, PabloUNSPECIFIEDUNSPECIFIED
Lehner, ManfredUNSPECIFIEDUNSPECIFIED
Krauss, ThomasUNSPECIFIEDUNSPECIFIED
Hoja, DanielleUNSPECIFIEDUNSPECIFIED
Reinartz, PeterUNSPECIFIEDUNSPECIFIED
Date:3 July 2008
Journal or Publication Title:The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, International Society for Photogrammetry and Remote Sensing
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:XXXVII
Page Range:pp. 1137-1342
ISSN:1682-1750
Status:Published
Keywords:Spaceborne Scanner Systems, Digital Elevation Models (DEM), Image Matching, CARTOSAT-1, Orthoimage, Accuracy Analysis
Event Title:ISPRS Conference 2008
Event Location:Peking (China)
Event Type:international Conference
Event Dates:2008-07-03 - 2008-07-11
Organizer:ISPRS
HGF - Research field:other
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:no assignment
DLR - Program:no assignment
DLR - Research theme (Project):no assignment
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Photogrammetry and Image Analysis
Deposited By: Angelo, Dr. Pablo
Deposited On:06 Nov 2008
Last Modified:31 Jul 2019 19:23

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