We represent image with topology relation, project relationand angle relation.
1、将图像的空间关系用拓扑关系、投影关系、角度关系来表示，并给出了以上几种关系的定义。
参考来源 - 基于空间关系的图像检索方法研究The automatic building of the spatial topology relation, the arbitrary polygon cutting of the vector map data and the automatic building of the buffer’s boundary are frequently used in the spatial data processing.
5．拓扑关系的自动构建、地图矢量数据的任意多边形裁剪和缓冲区边界的自动生成是空间数据处理经常用到的三个算法。
参考来源 - 基于GIS数据管理系统的研究与实践·2,447,543篇论文数据，部分数据来源于NoteExpress
Network simplification is significant in enhancing computing speed and reducing memory occupation of programs relative to ventilation network topology relation.
网络简化对提高与通风网络拓扑关系相关的计算程序的运算速度以及降低计算机内存占有量也具有重要意义。
It makes full use of the topology relation among triangles in TIN to search triangles intersected with the section line, which increases the efficiency of the algorithm.
该算法充分利用TIN中各三角形间存在的拓扑关系，实现了与剖面线相交三角形的快速搜索，大大提高了算法的执行效率。
Ventilation network equilibrium diagram has superiorities in quantitative and intuitional reflecting the topology relation and various properties of ventilation network.
通风网络平衡图在定量、直观反映通风网络的拓扑关系及各种性质方面，具有优越性。
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