原文链接及内容
顶部的地图预加载了低分辨率的切片。底部的地图没有使用任何预加载。试着缩小和平移，看看有什么不同。
main.js代码如下：
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| import BingMaps from 'ol/source/BingMaps.js';
import Map from 'ol/Map.js';
import TileLayer from 'ol/layer/Tile.js';
import View from 'ol/View.js';
const view = new View({
center: [-4808600, -2620936],
zoom: 8,
});
const map1 = new Map({
layers: [
new TileLayer({
preload: Infinity,
source: new BingMaps({
key: 'Your Bing Maps Key from https://www.bingmapsportal.com/ here',
imagerySet: 'Aerial',
}),
}),
],
target: 'map1',
view: view,
});
const map2 = new Map({
layers: [
new TileLayer({
preload: 0,
source: new BingMaps({
key: 'Your Bing Maps Key from https://www.bingmapsportal.com/ here',
imagerySet: 'AerialWithLabelsOnDemand',
}),
}),
],
target: 'map2',
view: view,
});
|
界面布局文件index.html代码如下：
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| <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Preload Tiles</title>
<link rel="stylesheet" href="node_modules/ol/ol.css">
<style>
.map {
width: 100%;
height: 400px;
}
</style>
</head>
<body>
<div id="map1" class="map"></div>
<div id="map2" class="map"></div>
<script src="https://cdn.jsdelivr.net/npm/elm-pep@1.0.6/dist/elm-pep.js"></script>
<script type="module" src="main.js"></script>
</body>
</html>
|
)
