Assessment of geo-coding and height accuracy of the dem derived from preliminary data sets of x-band srtm |
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Authors: | K S Rao S M Phalke Jyoti Sarup H K Al-Jassar |
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Institution: | 1. Physics Department, Kuwait University, Kuwait 2. Centre of Studies in Resources Engineering (CSRE), Indian Institute of Technology (IIT) Bombay, 400 076, Mumbai, India
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Abstract: | The first data set of X-band Digital Elevation Model (DEM), derived from Shuttle Radar Topography Mission (SRTM), of Gujarat
Earthquake affected area was processed to assess the geo-coding and height accuracy. A detailed survey of the study area was
carried out using Differential-GPS systems to get accurate control points. Though, it is the first data set processed without
Attitude and Orbit Determination Avionics, the geo-coding and height accuracy is good. It is observed that there is an average
shift of-1.5 pixels in Latitude and 2.5 pixels in Longitude with 1.5 pixels Standard Deviation (STD). A comparison of SRTM
and Differential-GPS heights indicates that there is a bias of 7.4 m with STD of 3.4 m. This is in agreement with the height
errors reported by the Deutschen Zentrums fur Luft- und Raumfahrt (DLR) in Height Error Map (HEM) data set. |
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