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gis-topology

v1.0.2

Published

前端gis拓扑分析库

Downloads

4

Vulnerabilities

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Links

Git

Maintainers

hiker7hiker7

Keywords

gistopologygeometry

Readme

gis-topology

这是一个gis前端的空间拓扑分析库

安装使用

安装

npm i gis-topology

API

utils模块

1、坐标比对方法

  1. isEqualCoord
    判断是否是相同的坐标

  2. compareCoord
    对比两个坐标，返回一个布尔值。方法接受一个容差值，当两个坐标直接差距小于容差，则返回真；否则返回假

  3. coordsIsEqualGeoHash
    判断两对坐标是否具有相同的geohash编码

  4. isEqualCoordList
    判断两组坐标是否完全相等

relation模块

  1. isIntersect
    判断两个线是否相交

ol模块

这个模块是对openlayers的空间运算的扩展, 方法的输入以openlayers中的feature和geometry对象为主

  1. getGeomMaxGeohash
    获取geometry对象的最大外接geohashBox

  2. getLineNodes
    获取线的所有节点坐标

  3. getLineBoundPoint
    获取线的端点

  4. isEqualLine
    判断两条线是否相同

  5. pointsGroupByHash
    将点集合按geohash编码分组

  6. testRepeatPointByHash
    检查重复点，基于geohash，编码相同的点被视为重复点

  7. testRepeatLineSlow
    检查重复线（数据量少时可以用）

  8. testRepeatLine
    检查重复线

  9. testSingleLineIntersect
    检查两个单线是否交叉(交点经过线上节点的情况除外)

  10. testLineIntersectMultiLine
    判断单线和多线是否相交

  11. testLineIntersect
    判断两个线是否相交

  12. testCrossesLines
    检查相交线（效率较高）

  13. groupPointByGeohash
    将坐标进行geohash编码，并存储到一个Map对象里

  14. testPointsNotTouchLineNodes

  15. testShortLines