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shp-utils

v0.2.0

Published

使用JavaScript在geojson和shp数据之间转换

Readme

说在前面

本库可以正常转换的SHP类型有
Point,Polyline,Polygon,MultiPoint,ZPoint,ZPolyline,ZPolygon,ZMultiPoint

~~暂不支持带M值的SHP类型~~

使用

安装

npm install shp-utils

导入

import { ShapeAutoToGeoJSON, GeoJSONToShape } from 'shp-utils';

API

SHP转GeoJSON

// files 是个文件数组,应该包含shp、dbf和cpg文件,其中shp为必须的;您也可以传入一个压缩为zip的压缩包;也可以只传入单个shp文件
ShapeAutoToGeoJSON(files, {
    removeBbox: false // 是否移除bbox属性,默认为false
}).then(geojson => {
    console.log(geojson);
})

GeoJSON转SHP

// geojson 是个geojson对象或者字符串
GeoJSONToShape(geojson, {
    returnFile: false,  // 是否返回File对象,默认返回的是DataView
    returnZip: false, // 是否压缩成一个zip文件
    fileName: 'shape', // 压缩文件名
}).then((zip) => {
    // 保存
    FileSaver.saveAs(zip, zip.name);
})

其他

提供了一些其他的方法,具体的传值和返回值可以参考一下typescript的类型定义

GenerateShpFile(geojson, option) // 生成shp和shx文件
GenerateDbfFile(geojson, option) // 生成dbf和cpg文件

ParseDbfFile(dbfFile, encoding) // 解析dbf文件
ParseShpFile(shpFile, option) // 解析shp文件