Show Point Data from GeoJSON on the Map

This tutorial shows how to add a GeoJSON point overlay to the map.

  1. Copy the following code, paste it into your favorite text editor, and save it as a .html file.

  2. Replace YOUR_MAPTILER_API_KEY_HERE with your actual MapTiler API key.

  3. The next it’s up to you. You can start the map in a different place by modifying the starting position and starting zoom, and you can change the look of the map to any of our styles, or yours, by updating the style URL. See what’s available here.

  4. To follow this tutorial you can use Airpots from Natural Earth. Download them here

  5. Add event handler for map load event. You will add code to create a GeoJSON source and a vector layer in this handler.

    
       map.addControl(new maplibregl.NavigationControl(), 'top-right');
       map.on('load', function() {
          
       });
     
  6. Add a custom image to the map. You can use any image or download the airport image we used in the tutorial. In the example the image is in the same folder as the index.html file

    
      map.on('load', function() {
        map.loadImage('./icon-plane-512.png', function(error, image){
          if (error) throw error;
          map.addImage('plane', image);
    
        });
      });
    
  7. Create GeoJSON source. The following snippet creates GeoJSON source hosted on MapTiler Cloud (check out the How to Upload GeoJSON to MapTiler Cloud tutorial). Publish the dataset and copy link to the geojson. Download the sample data here.

    
         map.addImage('plane', image);
         map.addSource('airports', {
           type: 'geojson',
           data: `https://api.maptiler.com/data/YOUR_MAPTILER_DATASET_ID_HERE/features.json?key=${key}`
         });
     
  8. Add the vector layer

    
         });
         map.addLayer({
           'id': 'airports',
           'type': 'symbol',
           'source': 'airports',
           'layout': {
             'icon-image': 'plane',
             'icon-size': ['*', ['get', 'scalerank'] ,0.01]
           },
           'paint': {}
         });
     });
     

Learn more

Check out the tutorials How to add a GeoJSON in MapLibre (video & code) to learn how to load a point GeoJSON and change the point icon.