区域边界无缝矢量化方法

A Seamless Raster-to-Vector Conversion on Grid Region

提出一种通过比较连接边坐标方位角大小实现边界无缝矢量化的方法,并给出具体算法及演示实验。该算法克服以往矢量化中边界线不闭合或存在双边界线等问题,矢量化结果可直接用于GIS的空间分析,不需要额外进行人工合缝或边界闭合等操作。利用该算法可大幅降低人工劳动的强度。

As we used to convert a grid region into closed curves, these curves are usually not exactly closed or produce narrow seams between regions. These shortcomings can not satisfy the requirements of spatial analysis in GIS, therefore, a new method of vectorization is produced to gain exactly closed curves. By using of the concept of coordinate azimuth, regions are adjoined seamlessly. Because all these conversion is automatic, there is no extra manual work to be done.