Mapbox GL JS #008 – 外部ファイルのGeoJSONを表示

外部ファイルのGeoJSONを表示するメモ。

script.js

// MIERUNE MONO読み込み
var map = new mapboxgl.Map({
    container: "map",
    style: {
        "version": 8,
        "sources": {
            "MIERUNEMAP": {
                "type": "raster",
                "tiles": ['https://tile.mierune.co.jp/mierune_mono/{z}/{x}/{y}.png'],
                "tileSize": 256
            }
        },
        "layers": [{
            "id": "MIERUNEMAP",
            "type": "raster",
            "source": "MIERUNEMAP",
            "minzoom": 0,
            "maxzoom": 18
        }]
    },
    center: [139.767, 35.681],
    zoom: 11
});

map.on('load', function () {

    // サークル設定
    map.addSource('point_sample', {
        type: 'geojson',
        data: './vector/sample.geojson'
    });

    // スタイル設定
    map.addLayer({
        "id": "point_sample",
        "type": "circle",
        "source": "point_sample",
        "layout": {},
        "paint": {
            'circle-color': "#FF0000",
            'circle-radius': 10
        }
    });

});

// コントロール関係表示
map.addControl(new mapboxgl.NavigationControl());

sample.geojson

{
"type": "FeatureCollection",
"name": "sample",
"crs": { "type": "name", "properties": { "name": "urn:ogc:def:crs:OGC:1.3:CRS84" } },
"features": [
{ "type": "Feature", "properties": { "field01": "一", "field02": "abcd", "field03": 5 }, "geometry": { "type": "Point", "coordinates": [ 139.766778945922852, 35.68198003744061 ] } },
{ "type": "Feature", "properties": { "field01": "二", "field02": null, "field03": 7 }, "geometry": { "type": "Point", "coordinates": [ 139.762916564941406, 35.674310750817348 ] } },
{ "type": "Feature", "properties": { "field01": "三", "field02": "kojsha", "field03": 9 }, "geometry": { "type": "Point", "coordinates": [ 139.763603210449219, 35.691391336319306 ] } }
]
}

Mapbox GL JSを手軽に始めるビルド環境公開しています。
mapboxgljs-starter

• 参考文献
  Mapbox GL JS