基于GIS的土壤侵蚀数字图接边方法研究

On the Methods of Jointing Vector Map of Soil Erosion by GIS

土壤侵蚀宏观调查与制图 ,往往需要多个单位、利用多个图幅同时开展工作 ,图幅之间常常出现属性差异和界线位移的问题。GIS技术的出现 ,实现了图形形状的“无缝接边” ,但属性差异仍然存在。针对这些问题 ,提出土壤侵蚀图接边的程序、原则和数字图的接边方法。为了提高工作效率 ,基于ARC/INFO软件的数字图接边 ,可以根据 2个图幅和对应遥感影像的总数据量 ,选用单编辑层接边、编辑层和背景层切换接边、图幅分割后接边等

The macroscopical survey and mapping of soil erosion are generally carried out by many units that use many maps, thus there are some errors of attribute and position of polygons between these units and maps. The seamless joint of map comes true through GIS (Geographic Information System), but GIS can not resolve attribute errors. The procedure, principal and the methods of vector map joint are put forward. For the high work efficiency, three methods based on GIS can be selected according to the size of maps and corresponding images, which are jointed in a single coverage reunited by two coverages, switch in the current and background coverages and joint the part/parts split form original map/maps.