原文链接及内容
此地图的视图在一个范围内受到限制。这可以使用extent视图选项来完成。请注意，当指定constrainOnlyCenter: True时，仅将范围限制应用于视图中心。
main.js代码如下：
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| import Map from 'ol/Map.js';
import OSM from 'ol/source/OSM.js';
import TileLayer from 'ol/layer/Tile.js';
import View from 'ol/View.js';
import ZoomSlider from 'ol/control/ZoomSlider.js';
import {defaults as defaultControls} from 'ol/control.js';
const view = new View({
center: [328627.563458, 5921296.662223],
zoom: 8,
extent: [-572513.341856, 5211017.966314, 916327.095083, 6636950.728974],
});
new Map({
layers: [
new TileLayer({
source: new OSM(),
}),
],
keyboardEventTarget: document,
target: 'map',
view: view,
controls: defaultControls().extend([new ZoomSlider()]),
});
|
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>Constrained Extent</title>
<link rel="stylesheet" href="node_modules/ol/ol.css">
<style>
.map {
width: 100%;
height: 400px;
}
</style>
</head>
<body>
<div id="map" 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>
|
)
