我正在尝试渲染一些从OpenMapTile下载的本地存储和基于矢量的图块。我这样做的原因是因为我的最终应用程序只能在无法连接到互联网的计算机上运行。
关于传单是否可以渲染基于矢量的图块，我已经读了很多不同的文章，但是从某些示例来看，它似乎可以。
It seems that it is not possible with Vector Grid that only does raster tiles，但it is possible with Leaflet.TileLayer.MBTiles
所以我尝试这样做，但是在尝试时总是偶然发现一个空白页……我有地图的控制器，但它什么都不显示。这是我的MWE。
<!DOCTYPE html>
<html>
<head>
<title>VectorGrid.Protobuf example</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="https://unpkg.com/leaflet@1.0.3/dist/leaflet.css" />
</head>
<body style='margin:0'>
<div id="map" style="width: 100vw; height: 100vh; background: white"></div>
<script type="text/javascript" src="https://unpkg.com/leaflet@1.3.1/dist/leaflet.js"></script>
<script type="text/javascript" src="https://unpkg.com/leaflet.vectorgrid@1.2.0"></script>
<script src="https://unpkg.com/sql.js@0.3.2/js/sql.js"></script>
<!--<script src="https://unpkg.com/leaflet.tilelayer.mbtiles@latest/Leaflet.TileLayer.MBTiles.js"></script>-->
<script src="Leaflet.TileLayer.MBTiles.js"></script>
<!-- <script type="text/javascript" src="../dist/Leaflet.VectorGrid.bundled.js"></script> -->
<script>
var vectorTileStyling = {
water: {
fill: true,
weight: 1,
fillColor: '#06cccc',
color: '#06cccc',
fillOpacity: 0.2,
opacity: 0.4,
},
admin: {
weight: 1,
fillColor: 'pink',
color: 'pink',
fillOpacity: 0.2,
opacity: 0.4
},
waterway: {
weight: 1,
fillColor: '#2375e0',
color: '#2375e0',
fillOpacity: 0.2,
opacity: 0.4
},
landcover: {
fill: true,
weight: 1,
fillColor: '#53e033',
color: '#53e033',
fillOpacity: 0.2,
opacity: 0.4,
},
landuse: {
fill: true,
weight: 1,
fillColor: '#e5b404',
color: '#e5b404',
fillOpacity: 0.2,
opacity: 0.4
},
park: {
fill: true,
weight: 1,
fillColor: '#84ea5b',
color: '#84ea5b',
fillOpacity: 0.2,
opacity: 0.4
},
boundary: {
weight: 1,
fillColor: '#c545d3',
color: '#c545d3',
fillOpacity: 0.2,
opacity: 0.4
},
aeroway: {
weight: 1,
fillColor: '#51aeb5',
color: '#51aeb5',
fillOpacity: 0.2,
opacity: 0.4
},
road: { // mapbox & nextzen only
weight: 1,
fillColor: '#f2b648',
color: '#f2b648',
fillOpacity: 0.2,
opacity: 0.4
},
tunnel: { // mapbox only
weight: 0.5,
fillColor: '#f2b648',
color: '#f2b648',
fillOpacity: 0.2,
opacity: 0.4,
// dashArray: [4, 4]
},
bridge: { // mapbox only
weight: 0.5,
fillColor: '#f2b648',
color: '#f2b648',
fillOpacity: 0.2,
opacity: 0.4,
// dashArray: [4, 4]
},
transportation: { // openmaptiles only
weight: 0.5,
fillColor: '#f2b648',
color: '#f2b648',
fillOpacity: 0.2,
opacity: 0.4,
// dashArray: [4, 4]
},
transit: { // nextzen only
weight: 0.5,
fillColor: '#f2b648',
color: '#f2b648',
fillOpacity: 0.2,
opacity: 0.4,
// dashArray: [4, 4]
},
building: {
fill: true,
weight: 1,
fillColor: '#2b2b2b',
color: '#2b2b2b',
fillOpacity: 0.2,
opacity: 0.4
},
water_name: {
weight: 1,
fillColor: '#022c5b',
color: '#022c5b',
fillOpacity: 0.2,
opacity: 0.4
},
transportation_name: {
weight: 1,
fillColor: '#bc6b38',
color: '#bc6b38',
fillOpacity: 0.2,
opacity: 0.4
},
place: {
weight: 1,
fillColor: '#f20e93',
color: '#f20e93',
fillOpacity: 0.2,
opacity: 0.4
},
housenumber: {
weight: 1,
fillColor: '#ef4c8b',
color: '#ef4c8b',
fillOpacity: 0.2,
opacity: 0.4
},
poi: {
weight: 1,
fillColor: '#3bb50a',
color: '#3bb50a',
fillOpacity: 0.2,
opacity: 0.4
},
earth: { // nextzen only
fill: true,
weight: 1,
fillColor: '#c0c0c0',
color: '#c0c0c0',
fillOpacity: 0.2,
opacity: 0.4
},
// Do not symbolize some stuff for mapbox
country_label: [],
marine_label: [],
state_label: [],
place_label: [],
waterway_label: [],
poi_label: [],
road_label: [],
housenum_label: [],
// Do not symbolize some stuff for openmaptiles
country_name: [],
marine_name: [],
state_name: [],
place_name: [],
waterway_name: [],
poi_name: [],
road_name: [],
housenum_name: [],
};
// Monkey-patch some properties for nextzen layer names, because
// instead of "building" the data layer is called "buildings" and so on
vectorTileStyling.buildings = vectorTileStyling.building;
vectorTileStyling.boundaries = vectorTileStyling.boundary;
vectorTileStyling.places = vectorTileStyling.place;
vectorTileStyling.pois = vectorTileStyling.poi;
vectorTileStyling.roads = vectorTileStyling.road;
var map = L.map('map');
//var openmaptilesUrl = "https://free-{s}.tilehosting.com/data/v3/{z}/{x}/{y}.pbf.pict?key={key}";
var openmaptilesUrl = "http://127.0.0.1:8080/2017-07-03_france_toulouse.mbtiles";
var openmaptilesVectorTileOptions = {
rendererFactory: L.canvas.tile,
attribution: '<a href="https://openmaptiles.org/">© OpenMapTiles</a>, <a href="http://www.openstreetmap.org/copyright">© OpenStreetMap</a> contributors',
vectorTileLayerStyles: vectorTileStyling,
subdomains: '0123',
key: 'UmmATPUongHdDmIicgs7',
maxZoom: 14
};
var mb = L.tileLayer.mbTiles(openmaptilesUrl).addTo(map);
/*var openmaptilesPbfLayer = L.vectorGrid.protobuf(openmaptilesUrl, openmaptilesVectorTileOptions).addTo(map);*/
map.setView({ lat: 47.040182144806664, lng: 9.667968750000002 }, 0);
/*L.control.layers({
OpenMapTiles: openmaptilesPbfLayer,
}, {}, {collapsed: false}).addTo(map);*/
</script>
</body>
</html>
由于找不到Leaflet.TileLayer.MBTiles，https://gitlab.com/IvanSanchez/Leaflet.TileLayer.MBTiles/blob/master/Leaflet.TileLayer.MBTiles.js是一个可以下载的版本
对于示例图块，您可以使用this one（直接从OpenMapTiles下载，该图集中于法国的图卢兹，因为它是一个较小的mbtile文件）。
我真的不明白问题是什么。在我的脑海中，很可能是传单无法读取矢量图块，在这种情况下，我认为我可以尝试对其进行转换，以便最终得到栅格图块，但我找不到找到这种方法的方法。我不知道最好的解决方案是什么...似乎有些人设法使其与矢量AND栅格图块as explained on StackOverflow一起使用，但我似乎找不到找到使之起作用的方法仅凭我自己，此链接的帖子不是很详细。
预先感谢您的帮助。
答案 0 :(得分：0)
尝试此更改：
var openmaptilesUrl = "http://127.0.0.1:8080/2017-07-03_france_toulouse.mbtiles";
为此：
var openmaptilesUrl = "./2017-07-03_france_toulouse.mbtiles";
并将mbtiles文件存储到index.html旁边的Web根目录