提出一种直接利用栅格图形游程编码进行图斑边界多边形矢量化提取的有效方法。
An effective method of vectorization in which both raster graphics and image data are converted into polygon features through tracing the run-length outline is developed.
尽管这个边界框是一个用于定义表示用户的区域的多边形，但我简化并使用该数据的一个点。
Although the bounding box is a polygon defining the area represented for the user, I simplify and use one point of this data.
类似地，州和国家边界可以用多边形表示。
Similarly, state and county boundaries can be represented with polygons.
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