如何在 MapBox GL JS 地图上加载 GeoJSON 图层？

Question

我需要在 MapBox GL JS 地图中加载 GeoJson 特征集合图层（点）。

我试过使用这个 HTML / Javascript 代码

<!DOCTYPE html>
<html>
<head>
    <meta charset='utf-8' />
    <title></title>
    <meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
    <script src='https://api.tiles.mapbox.com/mapbox-gl-js/v0.39.1/mapbox-gl.js'></script>
    <link href='https://api.tiles.mapbox.com/mapbox-gl-js/v0.39.1/mapbox-gl.css' rel='stylesheet' />
    <style>
        body { margin:0; padding:0; }
        #map { position:absolute; top:0; bottom:0; width:100%; }
    </style>
</head>
<body>

<div id='map'></div>
<script>
mapboxgl.accessToken = '<PUT YOUR MAPBOX KEY HERE>';
var map = new mapboxgl.Map({
    container: 'map',
    style: 'mapbox://styles/mapbox/light-v9',
    center: [7.828,44.836],
    zoom: 9
});

map.addControl(new mapboxgl.NavigationControl());

theCoords = {
"type": "FeatureCollection",
"features": [
{ "type": "Feature", "properties": { "NAME": "<b>Entrata Castello del Valentino<\/b>", "INFO": "Torino", "IMG_SRC": "<img src=\"http:\/\/ftp.webgisprova.altervista.org\/Database\/1T.JPG\">", "IMAGE,C": "<a href=\"http:\/\/ftp.webgisprova.altervista.org\/Database\/1.Entrata_Castello_del_Valentino.JPG\" target=\"_blank\">Immagine 360 ø<\/a>", "Longitudine": 7.6855111, "Latitudine": 45.0546417, "Altitudine": 288.39, "Direzione": 202.5, "Data": "2017:06:06", "Ora": "17:57" }, "geometry": { "type": "Point", "coordinates": [ 7.6855111, 45.0546417 ] } },    
{ "type": "Feature", "properties": { "NAME": "<b>Via Frazione di Buriasco<\/b>", "INFO": "Buriasco (TO)", "IMG_SRC": "<img src=\"http:\/\/ftp.webgisprova.altervista.org\/Database\/1B.JPG\">", "IMAGE,C": "<a href=\"http:\/\/ftp.webgisprova.altervista.org\/Database\/1.Via_Frazione_di_Buriasco.JPG\" target=\"_blank\">Immagine 360›<\/a>", "Longitudine": 7.4303883, "Latitudine": 44.8816653, "Altitudine": 0.0, "Direzione": 292.5, "Data": "2017:06:16", "Ora": "19:27" }, "geometry": { "type": "Point", "coordinates": [ 7.4303883, 44.8816653 ] } },    
{ "type": "Feature", "properties": { "NAME": "<b>Via Regione Maineri<\/b>", "INFO": "Buriasco (TO)", "IMG_SRC": "<img src=\"http:\/\/ftp.webgisprova.altervista.org\/Database\/1A.JPG\">", "IMAGE,C": "<a href=\"http:\/\/ftp.webgisprova.altervista.org\/Database\/1.Via_Regione_Maineri.JPG\" target=\"_blank\">Immagine 360›<\/a>", "Longitudine": 7.4328394, "Latitudine": 44.8790463, "Altitudine": 336.29, "Direzione": 180.0, "Data": "2017:06:16", "Ora": "20:23" }, "geometry": { "type": "Point", "coordinates": [ 7.4328394, 44.8790463 ] } },    
{ "type": "Feature", "properties": { "NAME": "<b>Via Frazione di Buriasco<\/b>", "INFO": "Buriasco (TO)", "IMG_SRC": "<img src=\"http:\/\/ftp.webgisprova.altervista.org\/Database\/10B.JPG\">", "IMAGE,C": "<a href=\"http:\/\/ftp.webgisprova.altervista.org\/Database\/10.Via_Frazione_di_Buriasco.JPG\" target=\"_blank\">Immagine 360›<\/a>", "Longitudine": 7.4236184, "Latitudine": 44.8790577, "Altitudine": 0.0, "Direzione": 270.0, "Data": "2017:06:16", "Ora": "19:30" }, "geometry": { "type": "Point", "coordinates": [ 7.4236184, 44.8790577 ] } },    
{ "type": "Feature", "properties": { "NAME": "<b>Via Rivasecca<\/b>", "INFO": "Buriasco (TO)", "IMG_SRC": "<img src=\"http:\/\/ftp.webgisprova.altervista.org\/Database\/10C.JPG\">", "IMAGE,C": "<a href=\"http:\/\/ftp.webgisprova.altervista.org\/Database\/10.Via_Rivasecca.JPG\" target=\"_blank\">Immagine 360›<\/a>", "Longitudine": 7.4266083, "Latitudine": 44.88725, "Altitudine": 348.79, "Direzione": 0.0, "Data": "2017:06:16", "Ora": "20:16" }, "geometry": { "type": "Point", "coordinates": [ 7.4266083, 44.88725 ] } },    
{ "type": "Feature", "properties": { "NAME": "<b>Viale Mattioli<\/b>", "INFO": "Torino", "IMG_SRC": "<img src=\"http:\/\/ftp.webgisprova.altervista.org\/Database\/10T.JPG\">", "IMAGE,C": "<a href=\"http:\/\/ftp.webgisprova.altervista.org\/Database\/10.Viale_Mattioli.JPG\" target=\"_blank\">Immagine 360›<\/a>", "Longitudine": 7.687725, "Latitudine": 45.0566306, "Altitudine": 282.6, "Direzione": 292.5, "Data": "2017:06:06", "Ora": "17:44" }, "geometry": { "type": "Point", "coordinates": [ 7.687725, 45.0566306 ] } }
]
};

map.on('load', function () {
        map.addSource("route", {
                "type": "geojson",
                "data": {
                        "type": "FeatureCollection",
                        "properties": {},
                        "geometry": theCoords
                }
        });

        map.addLayer({
                "id": "route",
                "type": "symbol",
                "source": "route",
                "paint": {
                        "circle-radius": 10,
                        "circle-color": "#ff0000"
                }
        });
});

</script>

</body>
</html>

我的浏览器控制台没有出现错误，但我在地图上看不到我的图层。我已经使用 http://geojsonlint.com/ 检查了我的 GeoJSON，一切似乎都是正确的（并且使用这个工具，我的 GeoJson 被绘制在工具图上....）。

我认为这可能与 GeoJSON 结构有关，但我不知道如何解决

Answer 1

我解决了！

这是正确的代码...

<!DOCTYPE html>
<html>
<head>
    <meta charset='utf-8' />
    <title></title>
    <meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
    <script src='https://api.tiles.mapbox.com/mapbox-gl-js/v0.39.1/mapbox-gl.js'></script>
    <link href='https://api.tiles.mapbox.com/mapbox-gl-js/v0.39.1/mapbox-gl.css' rel='stylesheet' />
    <style>
        body { margin:0; padding:0; }
        #map { position:absolute; top:0; bottom:0; width:100%; }
    </style>
</head>
<body>

<div id='map'></div>
<script>
mapboxgl.accessToken = '<PUT YOUR MAPBOX KEY HERE>';
var map = new mapboxgl.Map({
    container: 'map',
    style: 'mapbox://styles/mapbox/light-v9',
    center: [7.828,44.836],
    zoom: 9
});

map.addControl(new mapboxgl.NavigationControl());

        map.on('load', function () {
                map.addSource("route", {
                        "type": "geojson",
                        "data": "./data/test.geoJSON"
                });

        map.addLayer({
                "id": "route",
                "type": "circle",
                "source": "route",
                "paint": {
                        "circle-radius": 5,
                        "circle-color": "#ff0000"
                }
        });
});

</script>

</body>
</html>

我将我的 geoJSON 放在一个文件中，然后我使用 "data": "./data/test.geoJSON" 上传它.....

如何在 MapBox GL JS 地图上加载 GeoJSON 图层？

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