1) polygon overlaying
多边形叠置
1.
Aiming at the difficulty of polygon overlaying for data with no topological information in the geographical information system(GIS) spatial database, a novel quick algorithm on polygon overlaying based on topological information is presented.
针对GIS系统中实现无拓扑信息多边形叠置过程复杂的问题,提出了一种新的快速多边形叠置方法。
2) Polygon overlap
多边形叠加
3) Position-independent polygons
位置无关多边形
4) multiple superposed
多层叠置
1.
Using the method of geological analysis and taking the Shuigonghe syncline, Zhijin—Nayong Coalfield, as a case, the nonlinear occurrence of the geological conditions of the coalbed methane (CBM) in vertical section was discussed based on the measured data, and the academic viewpoint "unattached multiple superposed CBM-bearing system" was suggested and demonstrated preliminarily.
基于贵州织金—纳雍煤田水公河向斜的实测资料,采用地质分析等方法,探讨了煤层气地质条件在垂向上的非均质分布规律,提出和初步论证了"多层叠置独立含煤层气系统"的学术观点。
5) Graph overlay
图形叠置
6) quadrangle collapse
四边形折叠
1.
This paper presents a method to define the quadrangle in the triangle mesh and puts forward a new mesh simplification algorithm based on quadrangle collapse.
通过定义三角网格模型中的两个以公共边相连的三角形构成一个空间四边形,提出了一种新的基于这种空间四边形折叠的网格简化算法。
补充资料：凹多边形
Image:11534686683212413.jpg
凹多边形
把一个各边不自交的多边形任意一边向两方无限延长成为一直线，如果多边形的其他各边不在此直线的同旁，那么这个多边形就叫做凹多边形。
凹多边形的内角和的解，其实我们可以通过（n-2）·180来计算。实际上是把大于平角的角划分为两个角（如图）
说明：补充资料仅用于学习参考，请勿用于其它任何用途。