Create a 3D choropleth map of Europe with countries extruded

This map of Europe presents a 3D choropleth map representation, where countries are visually extruded based on data provided by an external dataset. The fill-extrusion-height paint property is employed to assign data-driven values to the polygons of different countries within the fill-extrusion layer.


npm install --save @maptiler/sdk

main.js

import { Map, MapStyle, config } from '@maptiler/sdk';
import '@maptiler/sdk/dist/maptiler-sdk.css';

config.apiKey = 'YOUR_MAPTILER_API_KEY_HERE';
const map = new Map({
    container: 'map',
    zoom: 3,
    center: [19.43, 49.49],
    pitch: 60,
    style: MapStyle.BASE,
    hash: false
});

  map.on('load', function () {
    map.addSource('countries', {
      'type': 'geojson',
      'data': 'https://docs.maptiler.com/sdk-js/assets/Mean_age_of_women_at_first_marriage_in_2019.geojson',
    });

    map.addLayer(
      {
        'id': 'eu-countries',
        'source': 'countries',
        'type': 'fill-extrusion',
        'paint': {
          'fill-extrusion-color': [
            'interpolate',
            ['linear'],
            ['get', 'age'],
            23.0,
            '#fff5eb',
            24.0,
            '#fee6ce',
            25.0,
            '#fdd0a2',
            26.0,
            '#fdae6b',
            27.0,
            '#fd8d3c',
            28.0,
            '#f16913',
            29.0,
            '#d94801',
            30.0,
            '#8c2d04'
          ],
          'fill-extrusion-opacity': 1,
          'fill-extrusion-height': ['*', ['get', 'age'], 5000]
        }
      }, 'Airport labels'
    );

    //Hide country borders for better visualization
    map.setLayoutProperty('Other border', 'visibility', 'none');
    map.setLayoutProperty('Disputed border', 'visibility', 'none');
    map.setLayoutProperty('Country border', 'visibility', 'none');

  });

index.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="robots" content="noindex">
  <title>Create a 3D choropleth map of Europe with countries extruded | NPM example</title>
  <link rel="stylesheet" href="./style.css">
</head>
<body>
  <div id="map"></div>
  <script type="module" src="./main.js"></script>
</body>
</html>

style.css

body {margin: 0; padding: 0;}
#map {position: absolute; top: 0; bottom: 0; width: 100%;}

<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Create and style clusters</title>
  <script src="https://cdn.maptiler.com/maptiler-sdk-js/v4.1.0/maptiler-sdk.umd.min.js"></script>
  <link href="https://cdn.maptiler.com/maptiler-sdk-js/v4.1.0/maptiler-sdk.css" rel="stylesheet" />
  <style>
    body {
      margin: 0;
      padding: 0;
    }

    #map {
      position: absolute;
      top: 0;
      bottom: 0;
      width: 100%;
    }
  </style>
</head>

<body>
  <div id="map"></div>

  <script>
    maptilersdk.config.apiKey = 'YOUR_MAPTILER_API_KEY_HERE';
    const map = new maptilersdk.Map({
      container: 'map',
      zoom: 3,
      center: [19.43, 49.49],
      pitch: 60,
      style: maptilersdk.MapStyle.BASE,
      hash: false
    });

    map.on('load', function () {
      map.addSource('countries', {
        'type': 'geojson',
        'data': 'https://docs.maptiler.com/sdk-js/assets/Mean_age_of_women_at_first_marriage_in_2019.geojson',
      });

      map.addLayer(
        {
          'id': 'eu-countries',
          'source': 'countries',
          'type': 'fill-extrusion',
          'paint': {
            'fill-extrusion-color': [
              'interpolate',
              ['linear'],
              ['get', 'age'],
              23.0,
              '#fff5eb',
              24.0,
              '#fee6ce',
              25.0,
              '#fdd0a2',
              26.0,
              '#fdae6b',
              27.0,
              '#fd8d3c',
              28.0,
              '#f16913',
              29.0,
              '#d94801',
              30.0,
              '#8c2d04'
            ],
            'fill-extrusion-opacity': 1,
            'fill-extrusion-height': ['*', ['get', 'age'], 5000]
          }
        }, 'Airport labels'
      );

      //Hide country borders for better visualization
      map.setLayoutProperty('Other border', 'visibility', 'none');
      map.setLayoutProperty('Disputed border', 'visibility', 'none');
      map.setLayoutProperty('Country border', 'visibility', 'none');

    });

  </script>
</body>

</html>