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@mapbox/tilelive-pixelmatch

v0.1.1

Published

2 years ago

Visually diff your raster tiles!

Downloads

4

tilelive-pixelmatch

A readonly tilelive source for visually diffing two raster tile sources using pixelmatch. This enables visual regression testing for maps.

Use Cases

Validate Boundary Changes in OSM

Browsable map diff

Usage

var tilelive = require("tilelive");
require('tilelive-http')(tilelive).registerProtocols(tilelive);
require('@mapbox/tilelive-pixelmatch')(tilelive).registerProtocols(tilelive);

const source1 = "https://api.mapbox.com/styles/v1/morgenkaffee/cix7xgxah00aw2pnoh7nwsozf/tiles/256/{z}/{x}/{y}?access_token=pk.eyJ1IjoibW9yZ2Vua2FmZmVlIiwiYSI6IjIzcmN0NlkifQ.0LRTNgCc-envt9d5MzR75w";
const source2 = "https://api.mapbox.com/styles/v1/morgenkaffee/cixyw0h9300612rql81d6r83d/tiles/256/{z}/{x}/{y}?access_token=pk.eyJ1IjoibW9yZ2Vua2FmZmVlIiwiYSI6IjIzcmN0NlkifQ.0LRTNgCc-envt9d5MzR75w";

function copyTiles(source, target) {
  tilelive.copy(source, target, {
    type: 'scanline',
        minzoom: 0,
        maxzoom: 4
  }, function(err) {
    if (err) throw err;
  });
}

const sourceUri = "pixelmatch:?source=" + source1 + "&source=" + source2;
const targetUri = "file://./diffs";
copyTiles(sourceUri, targetUri);