Add an icon to the map
This example uses an image from an external URL to visualize a point feature on the map.
Upon loading, the map uses loadImage
to load the image from an external domain, addImage
to add the image to the style as an icon, addSource
to add a data source containing one point feature, and addLayer
to create a new symbol layer that uses the icon to represent the point data and instructs the client to draw the image for each point in the data source.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Add an icon to the map</title>
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no">
<link href="https://api.mapbox.com/mapbox-gl-js/v3.7.0/mapbox-gl.css" rel="stylesheet">
<script src="https://api.mapbox.com/mapbox-gl-js/v3.7.0/mapbox-gl.js"></script>
<style>
body { margin: 0; padding: 0; }
#map { position: absolute; top: 0; bottom: 0; width: 100%; }
</style>
</head>
<body>
<div id="map"></div>
<script>
// TO MAKE THE MAP APPEAR YOU MUST
// ADD YOUR ACCESS TOKEN FROM
// https://account.mapbox.com
mapboxgl.accessToken = 'YOUR_MAPBOX_ACCESS_TOKEN';
const map = new mapboxgl.Map({
container: 'map', // container ID
// Choose from Mapbox's core styles, or make your own style with Mapbox Studio
style: 'mapbox://styles/mapbox/dark-v11', // style URL
zoom: 10, // starting zoom
center: [-77.432, 25.0306] // starting position
});
map.on('load', () => {
// Load an image from an external URL.
map.loadImage(
'https://docs.mapbox.com/mapbox-gl-js/assets/cat.png',
(error, image) => {
if (error) throw error;
// Add the image to the map style.
map.addImage('cat', image);
// Add a data source containing one point feature.
map.addSource('point', {
'type': 'geojson',
'data': {
'type': 'FeatureCollection',
'features': [
{
'type': 'Feature',
'geometry': {
'type': 'Point',
'coordinates': [-77.4144, 25.0759]
}
}
]
}
});
// Add a layer to use the image to represent the data.
map.addLayer({
'id': 'points',
'type': 'symbol',
'source': 'point', // reference the data source
'layout': {
'icon-image': 'cat', // reference the image
'icon-size': 0.25
}
});
}
);
});
</script>
</body>
</html>
このコードスニペットは、
YOUR_MAPBOX_ACCESS_TOKEN
をあなたのMapboxアカウントのアクセストークンに置き換えるまで、期待通りに動作しません。import React, { useEffect, useRef } from 'react';
import mapboxgl from 'mapbox-gl';
import 'mapbox-gl/dist/mapbox-gl.css';
const MapboxExample = () => {
const mapContainerRef = useRef();
const mapRef = useRef();
useEffect(() => {
// TO MAKE THE MAP APPEAR YOU MUST
// ADD YOUR ACCESS TOKEN FROM
// https://account.mapbox.com
mapboxgl.accessToken = 'YOUR_MAPBOX_ACCESS_TOKEN';
mapRef.current = new mapboxgl.Map({
container: 'map',
style: 'mapbox://styles/mapbox/dark-v11',
zoom: 10,
center: [-77.432, 25.0306]
});
mapRef.current.on('load', () => {
mapRef.current.loadImage(
'https://docs.mapbox.com/mapbox-gl-js/assets/cat.png',
(error, image) => {
if (error) throw error;
mapRef.current.addImage('cat', image);
mapRef.current.addSource('point', {
type: 'geojson',
data: {
type: 'FeatureCollection',
features: [
{
type: 'Feature',
geometry: {
type: 'Point',
coordinates: [-77.4144, 25.0759]
}
}
]
}
});
mapRef.current.addLayer({
id: 'points',
type: 'symbol',
source: 'point',
layout: {
'icon-image': 'cat',
'icon-size': 0.25
}
});
}
);
});
}, []);
return <div id="map" ref={mapContainerRef} style={{ height: '100%' }}></div>;
};
export default MapboxExample;
このコードスニペットは、
YOUR_MAPBOX_ACCESS_TOKEN
をあなたのMapboxアカウントのアクセストークンに置き換えるまで、期待通りに動作しません。このexampleは役に立ちましたか?