polygon

The color is used for the area covered by a (multi-)polygon or the line of a (multi-)linestring..颜色用于显示一个（多）多边形所覆盖的区域或一个（多）行字符串的行。

If the horizontal line drawn is aligned with a polygon vertex, then only the segments that are below the line are counted..如果所绘制的水平线与一个多边形顶点对齐，那么只会计算位于该线下方的部分。

Although the bounding box is a polygon defining the area represented for the user, I simplify and use one point of this data..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，但我简化并使用这些数据的一个点。

regular polygon,正多边形；正多角形

convex polygon,凸多边形；凸面多角形