A GIS-based mapping method on distribution of critical Ecological Situation in China
Agricultural land use ; Applied ecology ; China ; Geographical information system ; Human impact ; Land use ; Soil degradation ; Thematic mapping
Based on analysis of the characteristics of critical Ecological Situation in China with the principle of choosing index, a set of indices on the Ecological Situations in China has been brought out, and the mathematical models for each index has been
created. With GIS, and data base management system, this paper classifies each index, calculates their weight by county-level unit, and colligate them into a holistic map of the Ecological Situation in China. Analysis from the map indicates