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@mapbox/whoots-js

v3.1.0

Published

2 years ago

Request tiles from WMS servers that support EPSG:3857

Downloads

4,865,138

whoots-js

Request tiles from WMS servers that support EPSG:3857.

This project is a JavaScript port of https://github.com/timwaters/whoots by Tim Waters.

What is it?

Given a z/x/y tile coordinate like 19/154308/197167, whoots-js can request imagery from an EPSG:3857 supporting WMS server like this:

http://geodata.state.nj.us/imagerywms/Natural2015?
  bbox=-8242663.382160267,4966572.349857613,-8242586.945131982,4966648.786885899
  &format=image/png&service=WMS&version=1.1.1&request=GetMap&srs=EPSG:3857
  &width=256&height=256&layers=Natural2015

Usage

var WhooTS = require('@mapbox/whoots-js');

// Get an image url for a given tile coordinate
var baseUrl = 'http://geodata.state.nj.us/imagerywms/Natural2015';
var layer = 'Natural2015';
var url = WhooTS.getURL(baseUrl, layer, 154308, 197167, 19);

Server

This project includes a sample redirecting wms proxy server in server.js.

npm run server will start a local server on port 8080 that redirects tile requests.

Valid tile requests look like:

http://localhost:8080/tms/{z}/{x}/{y}/{layer}/{endpoint}
http://localhost:8080/tms/19/154308/197167/Natural2015/http://geodata.state.nj.us/imagerywms/Natural2015

Documentation

Complete API documentation is here: http://mapbox.github.io/whoots-js/