Show Polygon Data from GeoJSON on the Map

This tutorial shows how to add a GeoJSON overlay to the map using Leaflet JS.

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 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.

4. Create GeoJSON layer. The following snippet creates GeoJSON layer with one feature (without attributes) and polygon geometry.

   
        }).addTo(map);
    L.geoJSON({
        'type': 'Feature',
        'geometry': {
        'type': 'Polygon',
        'coordinates': [
            [
            [-67.13734351262877, 45.137451890638886],
            [-66.96466, 44.8097],
            [-68.03252, 44.3252],
            [-69.06, 43.98],
            [-70.11617, 43.68405],
            [-70.64573401557249, 43.090083319667144],
            [-70.75102474636725, 43.08003225358635],
            [-70.79761105007827, 43.21973948828747],
            [-70.98176001655037, 43.36789581966826],
            [-70.94416541205806, 43.46633942318431],
            [-71.08482, 45.3052400000002],
            [-70.6600225491012, 45.46022288673396],
            [-70.30495378282376, 45.914794623389355],
            [-70.00014034695016, 46.69317088478567],
            [-69.23708614772835, 47.44777598732787],
            [-68.90478084987546, 47.184794623394396],
            [-68.23430497910454, 47.35462921812177],
            [-67.79035274928509, 47.066248887716995],
            [-67.79141211614706, 45.702585354182816],
            [-67.13734351262877, 45.137451890638886]
            ]
        ]
        }
        }, {
        style: {
        color: "#088",
        opacity: 0.8,
        fillColor: "#088",
        fillOpacity: 0.8
        }
    }).addTo(map);
    

Related examples

Choropleth GeoJSON

Example

This tutorial shows how to add a styled GeoJSON overlay to the map using Leaflet, display a popup on click, and create a map legend.

Display thousands of polygons in Leaflet

Example

Learn how to display thousands of polygons in Leaflet JavaScript library using the leaflet-maptilersdk plugin.