# # GeoJsonLayerInterface

Interface for layers that render GeoJSON
(opens new window) data. This is a specification for implementers to model: it is not an exported method or class.

GeoJSON layers are rendered using GeoJsonLayer
(opens new window) in deck.gl
(opens new window). It allows a developer to overlay polygons, polylines and points (including circles, icons and texts) on a map by specifying the GeoJSON data and rendering options. These layers can be added to the map using Map#addLayer.

GeoJSON layers must have a unique `id` and must have the `type` of `'geojson'`.

## # Properties

In addition to the following properties, all properties of GeoJsonLayer
(opens new window) in deck.gl are supported.

### # `id` (`string`
(opens new window))

A unique layer id.

### # `maxzoom` (`number`
(opens new window))

The maximum zoom level for the layer. At zoom levels equal to or greater than the maxzoom, the layer will be hidden. The value can be any number between `0` and `24` (inclusive). If no maxzoom is provided, the layer will be visible at all zoom levels.

### # `minzoom` (`number`
(opens new window))

The minimum zoom level for the layer. At zoom levels less than the minzoom, the layer will be hidden. The value can be any number between `0` and `24` (inclusive). If no minzoom is provided, the layer will be visible at all zoom levels.

### # `type` (`string`
(opens new window))

The layer's type. Must be `'geojson'`.

## # Example

    const geojson = {
    	'type': 'FeatureCollection',
    	'features': [{
    		'type': 'Feature',
    		'geometry': {
    			'type': 'LineString',
    			'properties': {
    				'type': 0
    			},
    			'coordinates': [
    				[-77.0366048, 38.8987317],
    				[-77.0336437, 38.8987651],
    				[-77.0336437, 38.8954919]
    			]
    		}
    	}, {
    		'type': 'Feature',
    		'geometry': {
    			'type': 'LineString',
    			'properties': {
    				'type': 1
    			},
    			'coordinates': [
    				[-77.0083236, 38.8914336],
    				[-77.0081841, 38.8908240],
    				[-77.0081520, 38.8898971]
    			]
    		}
    	}]
    };
    const colors = [[255, 0, 0], [0, 0, 255]];

    map.addLayer({
    	id: 'geojson-lines',
    	type: 'geojson',
    	data: geojson,
    	filled: false,
    	getLineWidth: 4,
    	getLineColor: d => colors[d.properties.type],
    	opacity: 0.7,
    	minzoom: 10,
    	maxzoom: 22
    });