npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

sameplace-js

v0.0.3

Published

a simple gps coordinate transformer.

Downloads

2

Readme

sameplace-js

GPS坐标系统有多种标准,遵循不同的标准,相同的GPS经纬度坐标对应不同的绝对地址(地球上实际的一点)。sameplace-js在不同的标准间转换GPS坐标值。

intro 介绍

谷歌地球、腾讯地图、高德地图、百度地图针对不同的大地地理坐标系标准制作经纬度,由于参照物不一样,得出的经纬度值不同。

  • WGS84坐标系:地球坐标系,国际上通用的坐标系
  • GCJ02坐标系:火星坐标系,WGS84坐标系经加密后的坐标系
  • BD09坐标系:百度坐标系,GCJ02坐标系经加密后的坐标系

硬件/谷歌地球卫星采用WGS84地理坐标系(中国范围除外),腾讯地图/高德地图采用GCJ02地理坐标系,百度地图采用BD09坐标系。

install 安装

npm install --save sameplace-js

example 示例

// ES6
import transformer, { makeCoord, coordLat } from 'sameplace-js'

let wgs = makeCoord(22.34, 44.233511);
let bd = transformer('wgs', 'bd', wgs);

console.log('bd latitude', coordLat(bd));

usage 用法

// ES6
import transformer, { makeCoord, coordLat, coordLon } from 'sameplace-js'

// CommonJS
var sameplace = require("sameplace-js");
var transformer = sameplace.default;
var makeCoord = sameplace.makeCoord;
var coordLat = sameplace.coordLat;
var coordLon = sameplace.coordLon;

// AMD
define([ "sameplace-js", function(sameplace) {
    // sameplace is available
    var sameplace = require("sameplace-js");
    var transformer = sameplace.default;
    var makeCoord = sameplace.makeCoord;
    var coordLat = sameplace.coordLat;
    var coordLon = sameplace.coordLon;
});

API

type:

  • number: latitude, longitude
  • object: coord
  • string (only 'wgs', 'gcj' or 'bd'): from, to
// create a coord
makeCoord(latitude, longitude) ==> coord

// get latitude
coordLat(coord) ==> latitude

// get longitude
coordLon(coord) ==> longitude

// coordinate transformer
transformer(from, to, fromCoord) ==> toCoord

ref 参考链接

gps坐标标准的区别

gps坐标查询(支持多标准)