Openlayer加载GeoServer发布的WTMS

CDN

    <link rel="stylesheet" href="https://openlayers.org/en/v3.20.1/css/ol.css" type="text/css">
    <script src="https://openlayers.org/en/v3.20.1/build/ol.js" type="text/javascript"></script>

1. 点击Logo -》版本号 -》查看自己的wms地址

2. 查看WTMS，右键查看源码

3. 将所有`script`标签中的代码复制下来，删除红框，添加绿框

4.修改`baseUrl`

var baseUrl = 'http://localhost:8089/geoserver/gwc/service/wmts';

完整代码注意：`script`要放在`html`后

<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <title></title>
    <link rel="stylesheet" href="https://openlayers.org/en/v3.20.1/css/ol.css" type="text/css">
    <script src="https://openlayers.org/en/v3.20.1/build/ol.js" type="text/javascript"></script>

</head>

<body>
    <h2>WTMS</h2>
    <div id="map"></div>
</body>
<script src="js/test.js"></script>

</html>

test.js

function init() {
    var gridsetName = 'landsat_zdy';
    var gridNames = ['landsat_zdy:0', 'landsat_zdy:1', 'landsat_zdy:2', 'landsat_zdy:3', 'landsat_zdy:4', 'landsat_zdy:5'];
    var baseUrl = 'http://localhost:8089/geoserver/gwc/service/wmts';
    var style = '';
    var format = 'image/png';
    var infoFormat = 'text/html';
    var layerName = 'webgis_test:LC08_L1TP_123033_20170523_20170526_01_T1_B1';
    var projection = new ol.proj.Projection({
        code: 'EPSG:32650',
        units: 'm',
        axisOrientation: 'neu'
    });
    var resolutions = [2609.2074758118906, 1304.6037379059453, 652.3018689529727, 326.1509344764863, 163.07546723824316, 81.53773361912158];
    baseParams = ['VERSION', 'LAYER', 'STYLE', 'TILEMATRIX', 'TILEMATRIXSET', 'SERVICE', 'FORMAT'];

    params = {
        'VERSION': '1.0.0',
        'LAYER': layerName,
        'STYLE': style,
        'TILEMATRIX': gridNames,
        'TILEMATRIXSET': gridsetName,
        'SERVICE': 'WMTS',
        'FORMAT': format
    };
    // 构建layer的source
    function constructSource() {
        var url = baseUrl + '?'
        for (var param in params) {
            if (baseParams.indexOf(param.toUpperCase()) < 0) {
                url = url + param + '=' + params[param] + '&';
            }
        }
        url = url.slice(0, -1);

        var source = new ol.source.WMTS({
            url: url,
            layer: params['LAYER'],
            matrixSet: params['TILEMATRIXSET'],
            format: params['FORMAT'],
            projection: projection,
            tileGrid: new ol.tilegrid.WMTS({
                tileSize: [256, 256],
                extent: [166021.44309607794, 0.0, 833978.556903922, 9351399.593309816],
                origin: [166021.44309607794, 9351399.593309816],
                resolutions: resolutions,
                matrixIds: params['TILEMATRIX']
            }),
            style: params['STYLE'],
            wrapX: true
        });
        return source;
    }
    
    var layer = new ol.layer.Tile({
        source: constructSource()
    });

    var view = new ol.View({
        center: [0, 0],
        zoom: 2,
        projection: projection,
        extent: [166021.44309607794, 0.0, 833978.556903922, 9351399.593309816]
    });

    var map = new ol.Map({
        layers: [layer],
        target: 'map',
        view: view
    });
    map.getView().fit([320685.0, 4187385.0, 553515.0, 4424415.0], map.getSize());
}
init();