土地调查中有关城镇与农村土地面积问题的研究

第二次全国土地调查工作中，城镇与农村地区的土地面积在计算方法上有所不同：农村地区的土地面积是以椭球面为基准的面积，即球面面积；城镇地区的土地面积是以平面为基准的面积，即平面面积。二者之间存在差异并按一定规律变化，当调查区处于投影带边缘附近时，同一图斑的球面面积与平面面积之间的差异达到最大。由于采用不同的计算方法而导致面积数量的差异，在进行农村与城镇有关土地数据整合时会出现矛盾。为了建立城乡统一的土地管理信息系统，保证土地面积的一致性，应当采取相应措施消除二者之间的差异。

Study on Land Square in Urban and Rural Areas in Land Survey

During the second national land survey, methods on calculating the square of towns and rural areas are different. The calculation of rural areas is based on ellipsoid square, while the calculation of urban areas is based on plane square. These two have differences and changed by the law. When the survey area near the edge with a projection, the difference between the plane and spherical area at the same spot map is maximum. Different calculation methods will lead to differences in the number of areas. It will cause some problems in rural and urban land- related data integration. In order to establish a unified urban and rural land management information system, and ensure the consistency of land area, related countermeasures should be carried out to eliminate the differences between the two.