1 阐明

jsts 齐全就是依据其老妈 jts 的 java 包构造移植的，除了局部剖析性能须要额定留神外，基本上所有的子模块的根门路位于 jsts/org/locationtech/jts 模块下。

Geometry 类

Geometry 类合乎 OGC 简略因素标准的设计。它有若干个子类，例如点线面等。

Geometry 在 JTS 上有十分多实用的空间剖析函数：

buffer, buffer, buffer, compareTo, compareTo, contains, convexHull, copy, coveredBy, covers, crosses, difference, disjoint, distance, equals, equals, equalsExact, equalsNorm, equalsTopo, geometryChanged, getArea, getCentroid, getEnvelope, getEnvelopeInternal, getFactory, getGeometryN, getInteriorPoint, getLength, getNumGeometries, getPrecisionModel, getSRID, getUserData, hashCode, intersection, intersects, isRectangle, isValid, isWithinDistance, norm, overlaps, relate, relate, setSRID, setUserData, symDifference, toString, toText, touches, union, union, within

然而不见得所有的都在 JSTS 中有，见第 3 节的 buffer 举例。

turf 的剖析函数在特定条件下是计算失败的（已验证），所以我才不得不求助于 JSTS

2 装置

pnpm add jsts && pnpm add @types/jsts --save-dev

# or
npm install jsts && npm install @types/jsts --save-dev
# or
yarn add jsts && yarn add @types/jsts --save-dev

@types/jsts 是类型提醒库

3 应用

以 buffer 为例

import JSTSWKTReader from 'jsts/org/locationtech/jts/io/WKTReader'
import JSTSGeoJSONWriter from 'jsts/org/locationtech/jts/io/GeoJSONWriter'
import JSTSBufferOp from 'jsts/org/locationtech/jts/operation/buffer/BufferOp'

const wkt = `POINT (0 0)`
const bufferCenter = new JSTSWKTReader().read(wkt)
const bufferResult = JSTSBufferOp.bufferOp(
  bufferCenter,
  this.bufferRadius
) // instanceof Geometry

const bufferResultGeoJSON = new JSTSGeoJSONWriter().write(bufferResult)

4 JTS 文档

http://locationtech.github.io…