MapServer OGC Features

Example of displaying features from an MapServer OGC Features API

This example loads features from a MapServer OGC API Server using the OGC API - Features specification.

main.js

import Map from 'ol/Map.js';
import View from 'ol/View.js';
import GeoJSON from 'ol/format/GeoJSON.js';
import TileLayer from 'ol/layer/Tile.js';
import VectorLayer from 'ol/layer/Vector.js';
import {bbox as bboxStrategy} from 'ol/loadingstrategy.js';
import OSM from 'ol/source/OSM.js';
import VectorSource from 'ol/source/Vector.js';

const mapServerUrl = `https://demo.mapserver.org/cgi-bin/mapserv/localdemo/ogcapi/collections/lakes/items`;
const params = `f=json&limit=1000`;

const lakeStyle = {
  'fill-color': 'rgba(70, 130, 180, 0.6)',
  'stroke-color': 'rgba(25, 25, 112, 1)',
  'stroke-width': 2,
};

const layer = new VectorLayer({
  style: lakeStyle,
  source: new VectorSource({
    url: function (extent) {
      const extentString = extent.join(',');
      const url = `${mapServerUrl}?${params}&bbox=${extentString}`;
      return url;
    },
    strategy: bboxStrategy,
    format: new GeoJSON(),
  }),
});

const map = new Map({
  layers: [
    new TileLayer({
      className: 'bw',
      source: new OSM(),
    }),
    layer,
  ],
  target: 'map',
  view: new View({
    projection: 'EPSG:3857',
    center: [0, 0],
    zoom: 4,
  }),
});

index.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <title>MapServer OGC Features</title>
    <link rel="stylesheet" href="node_modules/ol/ol.css">
    <style>
      .map {
        width: 100%;
        height: 400px;
      }
      .bw {
        filter: grayscale(100%);
      }
    </style>
  </head>
  <body>
    <div id="map" class="map"></div>

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

package.json

{
  "name": "mapserver-ogc-features",
  "dependencies": {
    "ol": "10.9.0"
  },
  "devDependencies": {
    "vite": "^3.2.3"
  },
  "scripts": {
    "start": "vite",
    "build": "vite build"
  }
}