mo+vb，二次开发，读取矢量数据，放大、缩小、鹰眼、平移和完整的图层管理，由图到属性查询和由属性到地图的查询。-mo+ vb, secondary development, read the vector data, zoom, Eagle Eye, translation and the complete layer management, from the map to the property to the map queries and inquiries from the prope

将xy数据转换为矢量数据。输入文件为X Y两列数据，计算结果为矢量大小和方向。-Xy data is converted into vector data. The input file for the two XY data and calculated results for the vector magnitude and direction.