Identification and dynamics of agricultural environments in Northeast Thailand from landsat images (1972, 1976, 1982) |
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| Institution: | 1. Centre d''Etudes de Géographie Tropicale, CNRS, Bordeaux, France;7. Institut de Recherches Agronomiques Tropicales (CIRAD), Montpellier, France;71. Institut Géographique National, Paris, France;2. Khon Kaen University, Faculty of Agriculture, Khon Kaen, Thailand;1. National Authority for Remote Sensing and Space Sciences, Egypt;2. Department of Geophysics, Faulty of Science, Ain Shams University, Egypt;3. Nuclear Materials Authority, Egypt;1. Geosciences Department, College of Petroleum Engineering and Geosciences, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia;2. Center for Integrated Petroleum Research, College of Petroleum Engineering and Geosciences, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia |
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| Abstract: | The objective of this research is to prepare a cartographic methodology to present agricultural environments and their dynamics from satellite data. Three Landsat images (October 1972, January 1976, January 1982) have been used and a field survey has been done in 1984. After interactive processing on TRIAS system of Institut Geographique National (IGN). Five colour maps have been produced: - - a spatio-map with the new roads (1:250,000);
- - a map of the surface-states in 1982 (classified image) using a comparison with the two other dates for improvement (1:250,000);
- - a map of agro-ecological landscape units based on the combination between surface states showing interrelationships between agrarian systems and bio-physical environment (1:5000,000);
- - a map of the surface moisture seasonal variations to show the availability of water for the agriculture (1:400,000);
- - a map of changes in some agricultural environments components (1972–1982): water and flooded areas, agricultural areas, forests (1:500,000).
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