包含分析的基本算法是点与面之间的包含分析(point-in-polygon)。确定点与面之间是否存在包含关系可以采用铅垂线算法来解决,其原理如下: (1)假设研究区域 的一个封闭多边形 F=(n1,n2,nm),顶...
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Point-In-Polygon Algorithm 否在面内算法
point-in-polygon operations 区中点运算
Point in polygon 点在多边形内 ; 点包容性
point-in-polygon query 点包含判断
point in polygon testing 点包容检测
point-in-polygon analysis 点面包含分析
point-in-polygon operation 多边形内点判断
As you see in Figure 4, The solution to the point-in-polygon problem is to draw a horizontal line starting at the point in question.
如图 4 中所示,点包容问题的解决方案是绘制一条从所关注的点开始的水平线。
Each point of the polygon is added to the temporary shape on line 23, and if it's the first point in the polygon, its location is recorded as the placement for the text annotating that piece.
多边形的各个点都将被添加到第23行的临时图形中,并且如果它是多边形中的第一个点,则把其位置记录为注释该部分的文本的位置。
It is the basic function in the digital cartographic, electronic cartographic and GIS, the polygon be filled with point symbol.
多边形点符自动填充是数字地图制图、电子地图制作和GIS中不可缺少的功能。
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