Show multiGeometry data from GeoJSON on the map

In this tutorial, we will demonstrate the process of incorporating a GeoJSON MultiGeometry overlay onto the map. Throughout this tutorial, we will explore the steps to view a GeoJSON and learn how to customize the style for the layers of point, line, and polygon geometries.

Copy the following code, paste it into your favorite text editor, and save it as a .html file.
Install the npm package.
Include the CSS file.

If you have a bundler that can handle CSS, you can import the CSS or include it with a <link> in the head of the document via the CDN
Include the following code in your JavaScript file (Example: app.js).
Replace YOUR_MAPTILER_API_KEY_HERE with your actual MapTiler API key.
The next is up to you. You can center your map wherever you desire (modifying the starting position) and set an appropriate zoom level (modifying the starting zoom) to match your users’ needs. Additionally, you can change the map’s look (by updating the source URL); choose from a range of visually appealing map styles from our extensive MapTiler standard maps, or create your own to truly differentiate your application.
Add event handler for map load event. You will add code to create a GeoJSON source and a vector layer in this handler.
```
   map.on('load', async function() {
      
   });
 
```

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 the link to the GeoJSON. Download the GeoJSON multi-geometries sample data.


     map.on('load', async function() {
         const geojson = await maptilersdk.data.get('YOUR_MAPTILER_DATASET_ID_HERE');
         map.addSource('geojson-overlay', {
             'type': 'geojson',
             'data': geojson
         });
     });

Add the vector layer. Add a layer for each type of geometry: point, line and polygon


   map.addLayer({
     'id': 'geojson-overlay-fill',
     'type': 'fill',
     'source': 'geojson-overlay',
     'filter': ['==', '$type', 'Polygon'],
     'layout': {},
     'paint': {
       'fill-color': '#fff',
       'fill-opacity': 0.4
     }
   });
   map.addLayer({
     'id': 'geojson-overlay-line',
     'type': 'line',
     'source': 'geojson-overlay',
     'layout': {},
     'paint': {
       'line-color': 'rgb(68, 138, 255)',
       'line-width': 3
     }
   });
   map.addLayer({
     'id': 'geojson-overlay-point',
     'type': 'circle',
     'source': 'geojson-overlay',
     'filter': ['==', '$type', 'Point'],
     'layout': {},
     'paint': {
       'circle-color': 'rgb(68, 138, 255)',
       'circle-stroke-color': '#fff',
       'circle-stroke-width': 6,
       'circle-radius': 7
     }
   });

Fit the map view to the bounding box of the data.


   const bounds = [Infinity, Infinity, -Infinity, -Infinity];
   const processCoordinates = function(coords) {
       if (Array.isArray(coords[0])) {
           coords.map(c=>processCoordinates(c));
       } else {
           bounds[0] = Math.min(bounds[0], coords[0]);
           bounds[1] = Math.min(bounds[1], coords[1]);
           bounds[2] = Math.max(bounds[2], coords[0]);
           bounds[3] = Math.max(bounds[3], coords[1]);
       }
   };
   geojson.features.forEach(function(f) {
       if (f.geometry && f.geometry.coordinates) {
           processCoordinates(f.geometry.coordinates);
       }
   });
   map.fitBounds(bounds, {
       padding: 20
   });

View complete source code