geojson 与 wkt、kml、shpfile 互转

缘起

shpfile的读写库很凌乱，通常需要安装两个包，而且mapbox家的shpfile写库不支持中文写入（浏览器默认编码不支持gbk或gb2312，他们也懒的改）所以我就从头写了一遍，读写全有，扩充wkt、kml读写支持。

links

待开发

• kml 支持样式导出、导入
• kml 支持feature属性导入，可以是嵌入的html
• shpfile 强制crs
• shpfile 强制编码

使用

安装

yarn add geojson-converter-kit

# 或使用npm
npm install geojson-converter-kit

wkt

import { WKT } from 'geojson-converter-kit';

const wktStr = WKT.stringify({
  type: "Point",
  coordinates: [100.0, 0.0],
});

const geometry = WKT.parse(wktStr);

kml

import { KML } from "geojson-converter-kit";

const kmlStr = KML.stringify([
  {
    type: "Feature",
    properties: {},
    geometry: {
      type: "Point",
      coordinates: [100.0, 0.0],
    },
  },
]);

const features = KML.parse(kmlStr);

shpfile

import { SHPFILE } from "geojson-converter-kit";

const zipBlob = await SHPFILE.writeToZip([
  {
    type: "Feature",
    properties: {},
    geometry: {
      type: "Point",
      coordinates: [100.0, 0.0],
    },
  },
]);

const featureMaps = await SHPFILE.readFromZip(zipBlob);