Information on land use and soil erosion was extracted from TM remotely sensed images.

应用TM遥感影像，提取土地利用和土壤侵蚀的相关信息。

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GIS based soil information system (SIS) is very important for assessment of the capacity of land production, the status, rates of soil degradation and global change studies.

地理信息系统(GIS)支持下的土壤信息系统(SIS)在评价土地生产能力、土地退化的现状、速率和风险以及全球变化研究中具有重要意义。

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