TutrialsのQuick Start Guideから始める
LeafletのTutorialsでは、Quick Start guideとして、地図の表示、marker、circle、polygonに関するステップバイステップガイドが最初に載っている。
<!DOCTYPE html>
<html>
<head>
<title>Quick Start - Leaflet</title>
<meta charset="utf-8" />
<link rel="stylesheet" href="https://unpkg.com/leaflet@1.7.1/dist/leaflet.css" integrity="sha512-xodZBNTC5n17Xt2atTPuE1HxjVMSvLVW9ocqUKLsCC5CXdbqCmblAshOMAS6/keqq/sMZMZ19scR4PsZChSR7A==" crossorigin=""/>
<script src="https://unpkg.com/leaflet@1.7.1/dist/leaflet.js" integrity="sha512-XQoYMqMTK8LvdxXYG3nZ448hOEQiglfqkJs1NOQV44cWnUrBc8PkAOcXy20w0vlaXaVUearIOBhiXZ5V3ynxwA==" crossorigin=""></script>
</head>
<body>
<div id="map" style="width: 600px; height: 400px;"></div>
<script>
var mymap = L.map('map').setView([51.505, -0.09], 13);
L.tileLayer('https://api.mapbox.com/styles/v1/{id}/tiles/{z}/{x}/{y}?access_token=pk.eyJ1IjoibWFwYm94IiwiYSI6ImNpejY4NXVycTA2emYycXBndHRqcmZ3N3gifQ.rJcFIG214AriISLbB6B5aw', {
maxZoom: 18,
attribution: 'Map data © <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors, ' +
'Imagery © <a href="https://www.mapbox.com/">Mapbox</a>',
id: 'mapbox/streets-v11',
tileSize: 512,
zoomOffset: -1
}).addTo(mymap);
L.marker([51.5, -0.09]).addTo(mymap)
.bindPopup("<b>Hello world!</b><br />I am a popup.").openPopup();
L.circle([51.508, -0.11], 500, {
color: 'red',
fillColor: '#f03',
fillOpacity: 0.5
}).addTo(mymap).bindPopup("I am a circle.");
L.polygon([
[51.509, -0.08],
[51.503, -0.06],
[51.51, -0.047]
]).addTo(mymap).bindPopup("I am a polygon.");
var popup = L.popup();
function onMapClick(e) {
popup
.setLatLng(e.latlng)
.setContent("You clicked the map at " + e.latlng.toString())
.openOn(mymap);
}
mymap.on('click', onMapClick);
</script>
</body>
</html>これを、日本のへその北緯35度、東経135度をマークし、西方の北播磨田園空間博物館を中心に半径300ｍの円、東方に四角形のポリゴンを表示してみた。
<!DOCTYPE html>
<html lang="ja">
<head>
<title>Quick Start - Leaflet</title>
<meta charset="utf-8" />
<link rel="stylesheet" href="https://unpkg.com/leaflet@1.7.1/dist/leaflet.css" integrity="sha512-xodZBNTC5n17Xt2atTPuE1HxjVMSvLVW9ocqUKLsCC5CXdbqCmblAshOMAS6/keqq/sMZMZ19scR4PsZChSR7A==" crossorigin=""/>
<script src="https://unpkg.com/leaflet@1.7.1/dist/leaflet.js" integrity="sha512-XQoYMqMTK8LvdxXYG3nZ448hOEQiglfqkJs1NOQV44cWnUrBc8PkAOcXy20w0vlaXaVUearIOBhiXZ5V3ynxwA==" crossorigin=""></script>
</head>
<body>
<div id="map" style="width: 600px; height: 400px;"></div>
<script>
var mymap = L.map('map').setView([35.0045, 135], 13);
L.tileLayer('https://api.mapbox.com/styles/v1/{id}/tiles/{z}/{x}/{y}?access_token=pk.eyJ1IjoibWFwYm94IiwiYSI6ImNpejY4NXVycTA2emYycXBndHRqcmZ3N3gifQ.rJcFIG214AriISLbB6B5aw', {
maxZoom: 18,
attribution: 'Map data © <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors, ' +
'Imagery © <a href="https://www.mapbox.com/">Mapbox</a>',
id: 'mapbox/streets-v11',
tileSize: 512,
zoomOffset: -1
}).addTo(mymap);
L.marker([35, 135]).addTo(mymap)
.bindPopup("<b>Hello world!</b><br />I am a popup.").openPopup();
L.circle([35.00767, 134.987136], 300, {
color: 'green',
fillColor: '#0f0',
fillOpacity: 0.5
}).addTo(mymap).bindPopup("I am a circle.");
L.polygon([
[35.005, 135.001],
[35.005, 135.005],
[35.009, 135.005],
[35.009, 135.001]
]).addTo(mymap).bindPopup("I am a polygon.");
var popup = L.popup();
function onMapClick(e) {
popup
.setLatLng(e.latlng)
.setContent("You clicked the map at " + e.latlng.toString())
.openOn(mymap);
}
mymap.on('click', onMapClick);
</script>
</body>
</html>
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