Edit

Vector Tile Info



        

        

          
        

      


      

        

          
Getting feature information from vector tiles.

          
Move your pointer over rendered features to display feature properties.



        

      


      

        

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index.html<!DOCTYPE html>
<html lang="en">
  <head>
    <title>Vector Tile Info</title>
    <!-- The line below is only needed for old environments like Internet Explorer and Android 4.x -->
    <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script>
    <style>
      .map {
        width: 100%;
        height:400px;
      }
      #map {
        position: relative;
      }

      #info {
        z-index: 1;
        opacity: 0;
        position: absolute;
        bottom: 0;
        left: 0;
        margin: 0;
        background: rgba(0,60,136,0.7);
        color: white;
        border: 0;
        transition: opacity 100ms ease-in;
      }
    </style>
  </head>
  <body>
    <div id="map" class="map">
      <pre id="info"/>
    </div>
    <script src="index.js"></script>
  </body>
</html>

      

      

        

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index.jsimport 'ol/ol.css';
import Map from 'ol/Map';
import View from 'ol/View';
import MVT from 'ol/format/MVT';
import VectorTileLayer from 'ol/layer/VectorTile';
import VectorTileSource from 'ol/source/VectorTile';

var map = new Map({
  target: 'map',
  view: new View({
    center: [0, 0],
    zoom: 2
  }),
  layers: [new VectorTileLayer({
    source: new VectorTileSource({
      format: new MVT(),
      url: 'https://basemaps.arcgis.com/v1/arcgis/rest/services/World_Basemap/VectorTileServer/tile/{z}/{y}/{x}.pbf'
    })
  })]
});

map.on('pointermove', showInfo);

var info = document.getElementById('info');
function showInfo(event) {
  var features = map.getFeaturesAtPixel(event.pixel);
  if (features.length == 0) {
    info.innerText = '';
    info.style.opacity = 0;
    return;
  }
  var properties = features[0].getProperties();
  info.innerText = JSON.stringify(properties, null, 2);
  info.style.opacity = 1;
}


      

      

        

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package.json{
  "name": "vector-tile-info",
  "dependencies": {
    "ol": "6.1.1"
  },
  "devDependencies": {
    "parcel": "1.11.0"
  },
  "scripts": {
    "start": "parcel index.html",
    "build": "parcel build --experimental-scope-hoisting --public-url . index.html"
  }
}