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Titre du document / Document title

Digital terrain model (DTM) from Indian remote sensing (IRS) satellite data from the overlap area of two adjacent paths using digital photogrammetric techniques

Auteur(s) / Author(s)

MALLESWARA RAO T. C. (1) ; VENUGOPALA RAO K. (1) ; RAVI KUMAR A. (1) ; RAO D. P. (1) ; DEEKSHATULA B. L. (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) National Remote Sensing Agency, Hyderabad 500 037, INDE

Résumé / Abstract

Present day needs for medium- and small-scale topographic mapping at reduced cost and time can be met by using stereoscopic digital data acquired by present and planned satellites. In anticipation of the planned IRS-1C stereo data, attempts are made to use the overlap area between two adjacent paths of IRS-1A linear imaging self scanning (LISS)-II data as a stereo pair for generating a digital terrain model (DTM) using digital photogrammetric techniques. Software has been developed to recover the epipolar geometry of the stereo pair and to accomplish automated digital stereo matching to find the corresponding points in the left and right images by correlation techniques to calculate parallax to the sub-pixel level. The parallax is then used in conjunction with the IRS-1A data acquisition system to compute relative elevations. The absolute DTM is generated by referring the relative elevation to a few control points with known Z-coordinates. To evaluate the developed methodology and the software, three test sites at different locations in India near Palghat, Pune, and Dehradun were selected. It is observed that the overlap area between two adjacent paths increases from the equator to the poles whereas the base-to-height ratio (B/H) decreases. A methodology to calculate the percentage of overlap and B/H value at a given latitude is presented. The resultant DTMs for the three test sites were evaluated for error, and it is observed that 90 percent of RMSz errors fall within 33.95 m, 34.45 m, and 38.12 m at Palghat, Pune, and Dehradun, respectively. The DTM and the corresponding IRS-1A data are used to generate 3D perspective images. The software package developed will have potential usage in 3D analysis of IRS-1C stereo data.

Revue / Journal Title

Photogrammetric engineering and remote sensing    ISSN  0099-1112   CODEN PERSDV 

Source / Source

1996, vol. 62, no 6, pp. 679-685 (14 ref.), pp. 727-731

Langue / Language

Anglais

Editeur / Publisher

American Society for Photogrammetry and Remote Sensing, Bethesda, MD, ETATS-UNIS  (1975) (Revue)

Mots-clés anglais / English Keywords

remote sensing

;

cartography

;

photogrammetry

;

software

;

geometry

;

correlation

;

Pixel

;

data acquisition

;

methods

;

digital terrain models

;

Small scale

;

Image processing

;

algorithms

;

case studies

;

Mots-clés français / French Keywords

Télédétection

;

Cartographie

;

Photogrammétrie

;

Logiciel

;

Géométrie

;

Corrélation

;

Pixel

;

Saisie donnée

;

Méthodologie

;

Modèle numérique terrain

;

Echelle petite

;

Traitement image

;

Algorithme

;

Etude cas

;

Mots-clés espagnols / Spanish Keywords

Detección a distancia

;

Cartografía

;

Fotogrametría

;

Geometría

;

Correlación

;

Pixel

;

Toma dato

;

Metodología

;

Escala pequeña

;

Procesamiento imagen

;

Algoritmo

;

Estudio caso

;

Localisation / Location

INIST-CNRS, Cote INIST : 3289, 35400004372737.0080

Nº notice refdoc (ud4) : 3094457



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