OSM Vector Tiles

Using OpenStreetMap vector tiles.

A simple vector tiles map with Mapzen vector tiles. This example uses the TopoJSON format's layerName option to determine the layer ("water", "roads", "buildings") for styling. Note: [ol/format/MVT] is an even more efficient format for vector tiles.

main.js

import Map from 'ol/Map.js';
import TopoJSON from 'ol/format/TopoJSON.js';
import VectorTileLayer from 'ol/layer/VectorTile.js';
import VectorTileSource from 'ol/source/VectorTile.js';
import View from 'ol/View.js';
import {fromLonLat} from 'ol/proj.js';

const key = 'Your Nextzen API key from https://developers.nextzen.org/';

const rules = [
  {
    filter: ['==', ['get', 'layer'], 'water'],
    style: {
      'fill-color': '#9db9e8',
    },
  },
  {
    else: true,
    filter: ['all', ['==', ['get', 'layer'], 'roads'], ['get', 'railway']],
    style: {
      'stroke-color': '#7de',
      'stroke-width': 1,
      'z-index': ['number', ['get', 'sort_key'], 0],
    },
  },
  {
    else: true,
    filter: ['==', ['get', 'layer'], 'roads'],
    style: {
      'stroke-color': [
        'match',
        ['get', 'kind'],
        'major_road',
        '#776',
        'minor_road',
        '#ccb',
        'highway',
        '#f39',
        'none',
      ],
      'stroke-width': ['match', ['get', 'kind'], 'highway', 1.5, 1],
      'z-index': ['number', ['get', 'sort_key'], 0],
    },
  },
  {
    else: true,
    filter: [
      'all',
      ['==', ['get', 'layer'], 'buildings'],
      ['<', ['resolution'], 10],
    ],
    style: {
      'fill-color': '#6666',
      'stroke-color': '#4446',
      'stroke-width': 1,
      'z-index': ['number', ['get', 'sort_key'], 0],
    },
  },
];

const map = new Map({
  layers: [
    new VectorTileLayer({
      source: new VectorTileSource({
        attributions:
          '&copy; OpenStreetMap contributors, Who’s On First, ' +
          'Natural Earth, and osmdata.openstreetmap.de',
        format: new TopoJSON({
          layerName: 'layer',
          layers: ['water', 'roads', 'buildings'],
        }),
        maxZoom: 16,
        url:
          'https://tile.nextzen.org/tilezen/vector/v1/all/{z}/{x}/{y}.topojson?api_key=' +
          key,
      }),
      style: rules,
    }),
  ],
  target: 'map',
  view: new View({
    center: fromLonLat([-74.0064, 40.7142]),
    maxZoom: 19,
    zoom: 15,
  }),
});

index.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <title>OSM Vector Tiles</title>
    <link rel="stylesheet" href="node_modules/ol/ol.css">
    <style>
      .map {
        width: 100%;
        height: 400px;
      }
      .map {
        background: #f8f4f0;
      }
    </style>
  </head>
  <body>
    <div id="map" class="map"></div>

    <script type="module" src="main.js"></script>
  </body>
</html>

package.json

{
  "name": "osm-vector-tiles",
  "dependencies": {
    "ol": "9.1.0"
  },
  "devDependencies": {
    "vite": "^3.2.3"
  },
  "scripts": {
    "start": "vite",
    "build": "vite build"
  }
}