Discussion and Debate |
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DIGITAL SAR-TM COMBINATION IMAGE FOR 1:50,0001:100,000 INTERPRETATION GEOLOGIC MAPPING |
Zhu Liangpu1, Long Yunlin2, Xu Maosong3 |
1. Geology Dept, Beijing University;
2. Hunan Remots Sensing Centre;
3. Academy of Forest Inventory, Planning and Designing, Ministry of Forestry |
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Abstract The present paper deals with the technique of digital SAR-TM combination as well as the applicability of the combination image for geologic mapping. The process of combination takes on three steps. At first, Six seperate strips of radar data at 3M pixel resolution are mosaiced together to form a 900km2 image. Secondly, the SAR and TM data were respectively registered to GaussKruger projection system’ Finally, the false color composite image is produced in following manner: TM4 + SAR(R), TIS + SAN(G), and TM3 + SAR(B). Compared with the original image. Digital SAR-TM combination image has following advantages ; 1 ) The geologic interpretability is enhanced, 2 ) the geometric distortion of terrain featurs is improved, 3) the distinction of the whole image is intensified, because the local shadow area can be diminished due to the supplement of SAR and TM each other. The image of digital SAR-TM combination have abundant remote sensing information. It’ is a powerful tool for geologic interpretation and mapping (on scale 1: 50, 000-1: 100, 000 ).
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Issue Date: 02 August 2011
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[1] M. I. Daily et al, Photogramxxietric Engeneering and Remote Sensing., Vol. XLV. No. 8, 1979.
[2] T .G. Farr,}Remote Sensing for geological madding. Editor by P. Teleki. 1984.
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