【发布时间】：2018-08-14 22:07:17
【问题描述】：
我正在尝试渲染从 OpenMapTile 下载的一些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。
我已经阅读了很多关于传单是否可以渲染基于矢量的图块的内容，但从一些示例中似乎可以。
It seems that it is not possible with Vector Grid that only does raster tiles 但那个it is possible with Leaflet.TileLayer.MBTiles
所以我尝试这样做，但在尝试时总是偶然发现一个空白页面......我有地图的控制器，但它没有显示任何内容。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 是您可以下载的版本
作为一个示例图块，您可以使用this one（直接从 OpenMapTiles 下载，专注于法国的图卢兹，因为它是一个相当小的 mbtile 文件）。
我真的不明白问题出在哪里。我想到很可能是传单无法读取矢量图块，在这种情况下，我想我可以尝试转换它们，以便最终得到光栅图块，但我找不到这样做的方法。我不知道最好的解决方案是什么......似乎有些人已经设法让它与矢量和光栅图块一起工作as explained on StackOverflow，但我似乎无法找到一种方法让它在我的自己的，这个链接的帖子不是很详细。
提前感谢您的帮助。
【问题讨论】：
标签： javascript leaflet geospatial tiles vector-graphics