Putting forward the change statistic method based on acreage, and counting the varieties of vector map data by using polygon intersection of vector data and changed pixel of raster data.
提出基于面积的变化统计方法，分别利用矢量数据的多边形交集和栅格数据的变化像素来统计地图矢量数据的变化。
The practice proved to apply that the method establish 3D statistic map symbols library in common use, and application to the making of thematic map could get better effect.
实践证明，利用该方法建立常用的三维统计地图符号库，并将其应用于专题地图的制作，能取得良好的效果。
The practice proved to apply that the method establish 3D statistic map symbols library in common use, and application to the making of thematic map could get better effect.
实践证明，利用该方法建立常用的三维统计地图符号库，并将其应用于专题地图的制作，能取得良好的效果。
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