Delineation and assessment of Central Indian Suture through lineament extraction approach using Remote Sensing and Geographic Information System |
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| Authors: | Kuntal Ganguly Tarik Mitran |
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| Affiliation: | 1. Land Use and Land Cover Monitoring Division, Land Resources, Land Use Mapping and Monitoring Group, Remote Sensing Application Area, National Remote Sensing Centre, ISRO, Hyderabad, India;2. Soil and Land Resources Assessment Division, Land Resources, Land Use Mapping and Monitoring Group, Remote Sensing Application Area, National Remote Sensing Centre, ISRO, Hyderabad, India |
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| Abstract: | Lineament extraction approach allowed mapping of larger number of lineaments in a classical manner in tectonic and structural studies. In the present study, various techniques were adopted to extract lineaments using Landsat ETM+ images. To remove the biasness of the images, some pre-processing techniques like stream ordering, band differencing, colour texturing were employed to enhance the edges of the structural features. Extracted lineaments and its distribution and orientation were mapped using ArcGIS Spatial analyst tool. Results of the study showed maximum number of lineaments were oriented in the ENE–SWS direction with 63° overall inclination. Accuracy assessment and validation were made with respect to visual interpretation and overlaying the lineament on Digital Topographic Model as well as with respect to an existing geological lineament map of the study site. The result of accuracy assessment indicates higher compatibility of Central Indian Suture with the geological map of the study area. |
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| Keywords: | Central Indian Suture stream order DTM ETM+ lineament extraction |
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