Application of GIS technology in the evaluation of environmental condition

Ecological environment is a basis for the living and developing of human being. One of the urgent ecological problems is how to assess the ecological status of the environment in scientific, accurate and effective ways. The indexes of biological abundance, vegetation cover, hydrology, land degradation and environmental quality were selected to calculate the ecological environment quality index by AHP with the administrative region as a unit. The statistical analysis of spatial interpolation tools in GIS was used to get the grid layer, and then the grid calculation was made to get the ecological environmental quality index of each grid, finally to calculate the proportion of the administrative unit at all levels. The result showed that it could resolve the defects of using administrative unit as evaluation unit. This evaluation method focused on the differences among each unit and made the spatial location of evaluation result more precise.