NDLI: Evaluation of Digital Elevation Models (DEMs) generated from ASTER and SRTM data: A case study of flat alluvium terrain of Bakreshwar-Dubrajpur (W.B.), India

Content Provider	IEEE Xplore Digital Library
Author	Srivastava, V.K. Mondal, K.
Copyright Year	2012
Description	Author affiliation: Department of Applied Geophysics, Indian School of Mines, Dhanbad, India (Srivastava, V.K.; Mondal, K.)
Abstract	Digital Elevation Models (DEM) provides basic information on elevation of Earth's surface and are freely available from space borne SRTM (Shuttle Radar Topographic Mission) data - a mission of NASA and from ASTER (Advanced Space borne Thermal Emission and Reflection Radiometer) data - a mission of JAPAN. These data provide valuable information regarding surface topography for better understanding of geospatial features of earth. Considering its significance here an attempt has been made to evaluate DEMs generated from the above two data sources both in terms of horizontal as well as vertical variations in elevation values by taking an area which is comparatively a moderately sloping flat terrain with thin forest cover, Bakreshwar- Dubrajpur of West Bengal, India. DEMs, Shaded Relief and elevation contour maps of the area have been generated and studied using the ERDAS Imagine image processing software and Global Mapper Software. For comparison of elevation accuracy, three sites in the area have been chosen along a profile and on which elevation values have been extracted from SRTM, ASTER and Survey of India Topo sheet. The study has brought out that the the DEM generated from ASTER data provides a better view of terrain ie smaller features and minor elevation variation are discernible better then on SRTM -DEM. This may be attributed due to the crude horizontal spatial resolution of 90 meter of SRTM data as compared to 30 mt to that of ASTER data set. Therefore DEM generated from ASTER data provides better view of geospatial features and also the elevation values are near to ground survey data with variation of about 5%.
Starting Page	666
Ending Page	671
File Size	2884621
Page Count	6
File Format	PDF
ISBN	9781457706943
e-ISBN	9781457706974
DOI	10.1109/RAIT.2012.6194609
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-03-15
Publisher Place	India
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Image resolution Accuracy Image color analysis Toposheet ASTER Radiometry Software Geospatial analysis Bakreshwar DEM SRTM
Content Type	Text
Resource Type	Article

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