CartoDB source example

Example of a cartodb map.

A simple example with an anonymous cartodb map

main.js

import Map from 'ol/Map.js';
import TileLayer from 'ol/layer/Tile.js';
import View from 'ol/View.js';
import {CartoDB, OSM} from 'ol/source.js';

const mapConfig = {
  'layers': [
    {
      'type': 'cartodb',
      'options': {
        'cartocss_version': '2.1.1',
        'cartocss': '#layer { polygon-fill: #F00; }',
      },
    },
  ],
};

function setArea(n) {
  mapConfig.layers[0].options.sql =
    'select * from european_countries_e where area > ' + n;
}
const areaSelect = document.getElementById('country-area');
setArea(areaSelect.value);

const cartoDBSource = new CartoDB({
  account: 'documentation',
  config: mapConfig,
});

areaSelect.addEventListener('change', function () {
  setArea(this.value);
  cartoDBSource.setConfig(mapConfig);
});

const map = new Map({
  layers: [
    new TileLayer({
      source: new OSM(),
    }),
    new TileLayer({
      source: cartoDBSource,
    }),
  ],
  target: 'map',
  view: new View({
    center: [8500000, 8500000],
    zoom: 2,
  }),
});

index.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <title>CartoDB source example</title>
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css">
    <link rel="stylesheet" href="node_modules/ol/ol.css">
    <style>
      .map {
        width: 100%;
        height: 400px;
      }
    </style>
  </head>
  <body>
    <div id="map" class="map"></div>
    <form class="row">
      <div class="col-auto">
        <div class="input-group">
          <label for="country-area" class="input-group-text">Show european countries larger than</label>
          <select id="country-area" class="form-select">
            <option value="0" default>0 ㎢</option>
            <option value="5000">5000 ㎢</option>
            <option value="10000">10000 ㎢</option>
            <option value="50000">50000 ㎢</option>
            <option value="100000">100000 ㎢</option>
          </select>
        </div>
      </div>
    </form>

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

package.json

{
  "name": "cartodb",
  "dependencies": {
    "ol": "9.1.0"
  },
  "devDependencies": {
    "vite": "^3.2.3"
  },
  "scripts": {
    "start": "vite",
    "build": "vite build"
  }
}