图层相关
2020-06-09 本文已影响0人
扶不起的蝌蚪
除特殊注明的HTML结构
默认均为
<!DOCTYPE html>
<html lang="en">
<head>
<title>Image ArcGIS MapServer</title>
<!-- 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=fetch,requestAnimationFrame,Element.prototype.classList,URL"></script>
<style>
.map {
width: 100%;
height:400px;
}
</style>
</head>
<body>
<div id="map" class="map"></div>
<script src="index.js"></script>
</body>
</html>
加载ArcGIS图片图层
var layers = new ol.layer.Image({
source: new ImageArcGISRest({
ratio: 1,
params: {},
url: `https://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StateCityHighway_USA/MapServer`
})
})
var map = new Map({
layers: layer,
target: 'map',
view: new View({
center: [-10997148, 4569099],
zoom: 4
})
});
[加载ArcGIS瓦片图层]
这种source类型支持地图和图片服务，为了缓存ArcGis服务，但是最好的方式是推荐使用o.source.XYZ
import 'ol/ol.css';
import Map from 'ol/Map';
import View from 'ol/View';
import TileLayer from 'ol/layer/Tile';
import {OSM, TileArcGISRest} from 'ol/source';
var url = 'https://sampleserver1.arcgisonline.com/ArcGIS/rest/services/' +
'Specialty/ESRI_StateCityHighway_USA/MapServer';
var layers = [
new TileLayer({
source: new OSM()
}),
new TileLayer({
extent: [-13884991, 2870341, -7455066, 6338219],
source: new TileArcGISRest({
url: url
})
})
];
var map = new Map({
layers: layers,
target: 'map',
view: new View({
center: [-10997148, 4569099],
zoom: 4
})
});
图层的显示与隐藏
通过setVisible(Boolean)来控制图层的显示与隐藏
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bing Maps</title>
<!-- 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=fetch,requestAnimationFrame,Element.prototype.classList,URL"></script>
<style>
.map {
width: 100%;
height:400px;
}
</style>
</head>
<body>
<div id="map" class="map"></div>
<select id="layer-select">
<option value="Aerial">Aerial</option>
<option value="AerialWithLabelsOnDemand" selected>Aerial with labels</option>
<option value="RoadOnDemand">Road</option>
<option value="CanvasDark">Road dark</option>
<option value="OrdnanceSurvey">Ordnance Survey</option>
</select>
<script src="index.js"></script>
</body>
</html>
var styles = [
'RoadOnDemand',
'Aerial',
'AerialWithLabelsOnDemand',
'CanvasDark',
'OrdnanceSurvey'
];
var layers = [];
for (var i = 0 ; i < styles.length; ++i) {
layers.push(new TileLayer({
visible: false,
preload: Infinity,
source: new BingMaps({
key: 'Your Bing Maps Key from http://www.bingmapsportal.com/ here ',
imagerySet: styles[i]
// 超过19级的放大后，BING图层会显示为一张标识没有图层的图标，如果为了不显示此效果，你需要最大的放大层级设置为19
// maxZoom: 19
})
}));
}
var map = new Map({
layers: layers,
target: 'map',
view: new View({
center: [-6655.5402445057125, 6709968.258934638],
zoom: 13
})
});
var select = document.getElementById('layer-select');
function onChange() {
//通过遍历匹配与当前选中值相等的图层，使其显示
for (var i = 0 ; i < layers.length; ++i) {
layers[i].setVisible(styles[i] === select.value;);
}
}
select.addEventListener('change', onChange);
//初始化选中的图层
onChange();
