一、概述随着我国经济的快速发展,人口增加、城市扩展、土地需求量激增、生存环境压力加大,我国土地利用与土地变化的深度、广度以及速度较之以前都呈现出急剧增大的趋势。国家和各级政府决策部门需要及时了解和掌握土地利用与土地覆 I. Overview With the rapid economic development in our country, population growth, urban expansion, surging demand for land and increasing pressure on the living environment have shown a sharp increase in the depth, breadth and speed of land use and land change in China trend. National and various levels of government decision-making departments need to keep abreast of land use and land cover