The Overall land use Planning is an important means of the state to control the use of the land and improve the using efficiency of land resources.
土地利用总体规划是国家实行土地用途管制、提高土地资源效率的重要手段。
Region difference of scale efficiency of land among these cities was analysed. And then optimum scale of land efficiency in each city was obtained using analysis of efficiency loss.
然后运用效率损失分析给出各地级市的用地效率最优规模，并提出各地级市工业各投入要素的调整方向和调整空间。
Using the GIS and RS technology, the cultivated land database could be developed and evaluation units & data could be obtained quickly. Thus the efficiency of work could be improved.
利用GIS和RS技术可以建立耕地资源数据库，快速准确地获取评价数据和确定评价单元，提高评价工作效率；
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