STUDY ON DETECTION OF LAND COVER CHANGES BASED ON COMPARISON OF DIFFERENT GLOBAL LAND COVER MAP DATA

The land cover change over a wide area including desertification is the problems with which the environmental problem on the earth scales, such as global warming, deforestation, and acid rain, became entangled intricately.In this study, a comparative analysis is conducted using the global map data reflecting land cover of different time released by various researcher and research organizations, and land cover change is detected.And related detection of land cover change and its cause is performed from a viewpoint of soil degradation by comparing a land cover change map with a soil degradation map.Although two or more land cover map data on the global scale is released at this time, respectively, the creation method differs from the purpose and it is difficult to carry out both direct comparison in many cases.Then, in this study, the method of making the comparative analysis of different land covering map data through a potential natural vegetation map is conducted, and the present condition and the relation of a cause of land cover change on the global scale are detected quantitatively.