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@pirxpilot/eviltransform

v0.2.2

Published

Transform coordinate between earth(WGS-84) and mars in china(GCJ-02).

Downloads

53

Readme

NPM version

This is a fork of javascript portion of the eviltransform project. It cleans up strange export statements of the original.

npm install @pirxpilot/eviltransform

Transform coordinate between earth(WGS-84) and mars in china(GCJ-02).

GCJ-02 coordiante is used by Google Maps, Autonavi Map and other china map service. (Baidu Map has an extra offset based on GCJ-02)

WGStoGCJ/wgs2gcj

wgs2gcj(wgsLat, wgsLng)

Input WGS-84 coordinate(wgsLat, wgsLng) and convert to GCJ-02 coordinate(gcjLat, gcjLng). The output of javascript is like:

{"lat": xx.xxxx, "lng": yy.yyyy}

GCJtoWGS/gcj2wgs

gcj2wgs(gcjLat, gcjLng)

Input GCJ-02 coordinate(gcjLat, gcjLng) and convert to WGS-84 coordinate(wgsLat, wgsLng). The output of javascript is like:

{"lat": xx.xxxx, "lng": yy.yyyy}

The output WGS-84 coordinate's accuracy is 1m to 2m. If you want more exactly result, use GCJtoWGSExact/gcj2wgs_exact.

GCJtoWGSExact/gcj2wgs_exact

gcj2wgs_exact(gcjLat, gcjLng)

Input GCJ-02 coordinate(gcjLat, gcjLng) and convert to WGS-84 coordinate(wgsLat, wgsLng). The output of javascript is like:

{"lat": xx.xxxx, "lng": yy.yyyy}

The output WGS-84 coordinate's accuracy is less than 0.5m, but much slower than GCJtoWGS/gcj2wgs.

Distance/distance

distance(latA, lngA, latB, lngB)

Calculate the distance between point(latA, lngA) and point(latB, lngB), unit in meter.

地球坐标(WGS-84)与火星坐标(GCJ-2)转换.

GCJ-02坐标用在谷歌地图,高德地图等中国地图服务。(百度地图要在GCJ-02基础上再加转换)

WGStoGCJ/wgs2gcj

wgs2gcj(wgsLat, wgsLng)

输入WGS-84地球坐标(wgsLat, wgsLng),转换为GCJ-02火星坐标(gcjLat, gcjLng)。javascript输出格式如下:

{"lat": xx.xxxx, "lng": yy.yyyy}

GCJtoWGS/gcj2wgs

gcj2wgs(gcjLat, gcjLng)

输入GCJ-02火星坐标(gcjLat, gcjLng),转换为WGS-84地球坐标(wgsLat, wgsLng)。javascript输出格式如下:

{"lat": xx.xxxx, "lng": yy.yyyy}

输出的WGS-84坐标精度为1米到2米之间。如果要更精确的结果,使用GCJtoWGSExact/gcj2wgs_exact。

GCJtoWGSExact/gcj2wgs_exact

gcj2wgs_exact(gcjLat, gcjLng)

输入GCJ-02火星坐标(gcjLat, gcjLng),转换为WGS-84地球坐标(wgsLat, wgsLng)。javascript输出格式如下:

{"lat": xx.xxxx, "lng": yy.yyyy}

输出的WGS-84坐标精度为0.5米内,但是计算速度慢于GCJtoWGS/gcj2wgs。

Distance/distance

distance(latA, lngA, latB, lngB)

计算点(latA, lngA)和点(latB, lngB)之间的距离,单位为米。