OpenLayers示例代码：缩放线
OpenLayers示例代码：缩放线
<!DOCTYPE html>
<html>
<head>
<title>Scale Line</title>
<link rel="stylesheet" href="https://openlayers.org/en/v4.0.1/css/ol.css" type="text/css">
<!-- The line below is only needed for old environments like Internet Explorer and Android 4.x -->
<script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script>
<script src="https://openlayers.org/en/v4.0.1/build/ol.js"></script>
</head>
<body>
<div id="map" class="map"></div>
<select id="units">
<option value="degrees">degrees</option>
<option value="imperial">imperial inch</option>
<option value="us">us inch</option>
<option value="nautical">nautical mile</option>
<option value="metric" selected>metric</option>
</select>
<script>
var scaleLineControl = new ol.control.ScaleLine();
var map = new ol.Map({
controls: ol.control.defaults({
attributionOptions: /** @type {olx.control.AttributionOptions} */ ({
collapsible: false
})
}).extend([
scaleLineControl
]),
layers: [
new ol.layer.Tile({
source: new ol.source.OSM()
})
],
target: 'map',
view: new ol.View({
center: [0, 0],
zoom: 2
})
});
var unitsSelect = document.getElementById('units');
function onChange() {
scaleLineControl.setUnits(unitsSelect.value);
}
unitsSelect.addEventListener('change', onChange);
onChange();
</script>
</body>
</html>
说明：
OpenLayers示例代码：缩放线
