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Comparison of DEMs derived from InSAR and Optical Stereo Techniques Y. S. Rao and K.S. Rao PowerPoint Presentation
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Comparison of DEMs derived from InSAR and Optical Stereo Techniques Y. S. Rao and K.S. Rao Centre of Studies in Resources Engineering Indian Institute of Technology, Bombay India . Test Sites Koyna Rugged Terrain Height 300–1100 m Mumbai Flat terrain with hills

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Comparison of DEMs derived from InSAR and Optical Stereo Techniques

Y. S. Rao and K.S. Rao

Centre of Studies in Resources Engineering

Indian Institute of Technology, Bombay

India

slide2

Test Sites

  • Koyna
  • Rugged Terrain
  • Height 300–1100 m
  • Mumbai
  • Flat terrain with hills
  • Height 0 – 331 m

Optical Data : IRS-1C PAN

14TH & 18TH Feb. 2002, B/H = 0.47

20TH & 29TH Mar. 2000, B/H = 0.37

SAR Data : ERS-1 & 2 (raw) 17th & 18th April 1996 B_|_= 118 m, B|| = 56

25th & 26th May 1996 B_|_= 126 m, B|| = 65

Comparison (Koyna)

RMS (opt) : 20 m -- 16 m 9 m -- 30 m

(Mumbai) : 11 m -- 10 m 16 m -- 13 m

Data Processing

PCI OrthoEngine

Gamma Software

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Optical DEM

InSAR DEM

Contours are similar to that of Topomap of Survey of India

Contours are disturbed due to layover and look angle effects