【摘要】 目的应用MapInfo 7对空间数据的分析与查询功能构造数字高程模型(Dig-ital Elevation Model,DEM);结合Surfer 8.0的曲面建模功能计算土方工程量.方法将地形图的AutoCAD文件或DXF文件转化为MapInfo表文件;利用MapInfo 7提取坐标点x,y,z数据,导出DEM数据;利用Surfer 8.0将导出的DEM数据进行网格化处理;根据三维表达结果,分别计算原始地形体积和设计地形体积,并进一步计算土方工程量.结果应用此方法结合实例计算了土方工程量.结论应用MapInfo 7和Surfer 8.0计算土方工程量的方法,相对于常用的方格网法、断面法和等高线法,更为简洁、直观,在提高土方计算精度的同时,实现了计算的自动化.更多还原

【Abstract】 MapInfo 7 can be used to analyze and obtain the 3D space data and to construct Digital Elevation Model.Combined with the surface modeling and earthwork volume calculation function of Surfer 8.0,MapInfo 7 is applied to calculate earthwork volume.Firstly,the AutoCAD document or DXF document of relief map is converted into MapInfo table form and the DEM data are exported by obtaining the coordinate data with MapInfo 7.Secondly,the DEM data are turned into grid with Surfer 8.0 to demonstrate in 3D version.Finally,according to 3D data,the earthwork volume is calculated by calculating the original volume and designed volume respectively.Calculation of earthwork volume by MapInfo 7 and Surfer 8.0 is more succinct and direct compared with Grid method,Ross-section method and Contour lines method.Not only is the accuracy of earthwork volume calculation improved,but also automation of calculation can be achieved.更多还原