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Authors
Affiliations
1 Centre of Exploration Geophysics, Osmania University, Hyderabad - 500 007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 54, No 3 (1999), Pagination: 221-235
Abstract
During the last one decade or so, computers have revolutionised the practices in earth sciences the world over Space technology provided the impetus and the necessary tools for presenting geoscietific data as images besides the usual coloured geological maps and geophysical contour presentations. The greatest advantage of an image is its enhanced visual perspective and its ability to bring out subtle features / trends that may be less discernible in ordinary contour maps. In India, geoscientists are yet to realise the full potential of image technology and to take advantage of it. The present article is a demonstration of the usefulness of geophysical images as a complement to their contoured versions.
A rapid and cost effective method earlier devised by the author and his colleagues was adopted for digitising the Free-air, Bouguer and Isostatic gravity anomaly maps of India. The digital data thus produced were used for generating images in shaded relief and colour. These images reveal a number of interesting geological and tectonic features which have been highlighted in this paper for further detailed study by the geoscientists. While some of these correspond to those already known, the others are distinguishable primarily in the images and therefore not reported earlier.
Keywords
Digital Image Processing, Geophysical Anomaly Images, Tectonic Features, India.
