epsg-index

A machine-readable index of all EPSG coordinate systems. Similar to epsg and node-proj4js-defs, but kept up to date (so far). Like python-epsg, but in JavaScript/JSON.

Installing

npm install epsg-index

Usage

// use import assertions once they're supported by Node.js & ESLint
// https://github.com/tc39/proposal-import-assertions
import {createRequire} from 'module'
const require = createRequire(import.meta.url)

const epsg4326 = require('epsg-index/s/4326.json')

console.log(epsg4326)

{
	code: '4326',
	kind: 'CRS-GEOGCRS',
	name: 'WGS 84',
	wkt: 'GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]]',
	proj4: '+proj=longlat +datum=WGS84 +no_defs',
	bbox: [90, -180, -90, 180],
	unit: 'degree (supplier to define representation)',
	area: 'World.',
	accuracy: null
}

You can also load all coordinate systems (5mb of data):

const all = require('epsg-index/all.json')

console.log(all['4326'])

Related

• transform-coordinates – Transform coordinates from one coordinate system to another. Built on top of epsg-index.
• python-epsg – A Python API to the EPSG Geodetic Parameter Dataset.

Contributing

If you have a question or have difficulties using epsg-index, please double-check your code and setup first. If you think you have found a bug or want to propose a feature, refer to the issues page.