Cesium 加载 Geoserver WMS 图层以及条件查询和切换图层样式

Cesium 加载 Geoserver WMS 图层以及条件查询和切换图层样式

    • 图层样式核心代码
    • 完整代码:
    • 在线示例

Cesium 加载 Geoserver WMS 图层,在实际项目中常常会遇到,需要对图层进行过滤,这里介绍一下过滤方法。

Cesium Geoserver 图层条件过滤与 Openlayers 略有不同,不过原理是一样的。

也是利用 Geoserver 的 CQL_FILTER 实现功能。


本文包括图层样式核心代码、完整代码以及在线示例。


图层样式核心代码

Geoserver 图层样式核心代码:


// 图层参数
const parameters = {
    transparent: true,
    format: "image/png",
    srs: "EPSG:4326",
    // 图层样式
    styles: style || "",
}

CQL_FILTER && (parameters.cql_filter = "NAME='密云区' or NAME like '%大兴%'  or DAIMA = 110109");

// 添加 geoserver 发布的 wms 数据
layer = viewer.imageryLayers.addImageryProvider(new Cesium.WebMapServiceImageryProvider({
    url: "http://openlayers.vip/geoserver/cite/wms",
    // 必填
    layers: "cite:2000",
    parameters: parameters
}));


完整代码:


DOCTYPE html>
<html lang="en">
<head>
    
    <meta charset="utf-8"/>
    
    <meta http-equiv="X-UA-Compatible" content="IE=edge"/>
    
    <meta
            name="viewport"
            content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no"
    />
    <title>Cesium WMTS WMS FILTERtitle>
    <script src="./Cesium.js">script>
    <script src="http://www.openlayers.vip/examples/resources/jquery-3.5.1.min.js">script>
    <style>
        @import url(./Widgets/widgets.css);

        html,
        body,
        #cesiumContainer {
            width: 100%;
            height: 100%;
            margin: 0;
            padding: 0;
            overflow: hidden;
        }
    style>
    <script>
        var _hmt = _hmt || [];
        (function () {
            var hm = document.createElement("script");
            hm.src = "https://hm.baidu.com/hm.js?f80a36f14f8a73bb0f82e0fdbcee3058";
            var s = document.getElementsByTagName("script")[0];
            s.parentNode.insertBefore(hm, s);
        })();
    script>
head>
<body>
<br/>

<button id="geoserverFunc" onClick="geoserverFunc()">geoserverbutton>
<button id="geoserverFilter" onClick="geoserverFunc(true)">geoserverFilterbutton>
<button id="geoserverStyle" onClick="geoserverFunc(undefined,'polygon')">geoserverFilterbutton>
<button id="restoreFunc" onClick="geoserverFunc()">restoreFuncbutton>
<button id="clearFunc" onClick="clearFunc()">清空button>

<div id="cesiumContainer">div>
<script>
    // 这个 tk 只能在本域名下使用
    var token = '2b7cbf61123cbe4e9ec6267a87e7442f';
    // 服务域名
    var tdtUrl = 'https://t{s}.tianditu.gov.cn/';
    // 服务负载子域
    var subdomains = ['0', '1', '2', '3', '4', '5', '6', '7'];
    var viewer = new Cesium.Viewer('cesiumContainer', {
        shouldAnimate: true,
        selectionIndicator: true,
        animation: false,       //动画
        homeButton: false,       //home键
        geocoder: false,         //地址编码
        baseLayerPicker: false, //图层选择控件
        timeline: false,        //时间轴
        fullscreenButton: false, //全屏显示
        infoBox: false,         //点击要素之后浮窗
        sceneModePicker: false,  //投影方式  三维/二维
        navigationInstructionsInitiallyVisible: false, //导航指令
        navigationHelpButton: false,     //帮助信息
        selectionIndicator: false, // 选择
        imageryProvider: new window.Cesium.WebMapTileServiceImageryProvider({
            //影像底图
            url: "http://t{s}.tianditu.com/img_w/wmts?service=wmts&request=GetTile&version=1.0.0&LAYER=img&tileMatrixSet=w&TileMatrix={TileMatrix}&TileRow={TileRow}&TileCol={TileCol}&style=default&format=tiles&tk=" + token,
            subdomains: subdomains,
            layer: "tdtImgLayer",
            style: "default",
            format: "image/jpeg",
            tileMatrixSetID: "GoogleMapsCompatible",//使用谷歌的瓦片切片方式
            show: true
        })
    });

    viewer.imageryLayers.addImageryProvider(new window.Cesium.WebMapTileServiceImageryProvider({
        //影像注记
        url: "http://t{s}.tianditu.com/cia_w/wmts?service=wmts&request=GetTile&version=1.0.0&LAYER=cia&tileMatrixSet=w&TileMatrix={TileMatrix}&TileRow={TileRow}&TileCol={TileCol}&style=default.jpg&tk=" + token,
        subdomains: subdomains,
        layer: "tdtCiaLayer",
        style: "default",
        format: "image/jpeg",
        tileMatrixSetID: "GoogleMapsCompatible",
        show: true
    }));

    // // 叠加国界服务
    var iboMap = new window.Cesium.UrlTemplateImageryProvider({
        url: tdtUrl + 'DataServer?T=ibo_w&x={x}&y={y}&l={z}&tk=' + token,
        subdomains: subdomains,
        tilingScheme: new window.Cesium.WebMercatorTilingScheme(),
        maximumLevel: 10
    });

    viewer.imageryLayers.addImageryProvider(iboMap);

    // 加载 geoserver 图层
    let layer;

    // 添加图层
    function geoserverFunc(CQL_FILTER, style) {

        clearFunc();

        const parameters = {
            transparent: true,
            format: "image/png",
            srs: "EPSG:4326",
            // 非必填
            styles: style || "",
        }

        CQL_FILTER && (parameters.cql_filter = "NAME='密云区' or NAME like '%大兴%'  or DAIMA = 110109");

        // 添加geoserver发布的wms数据
        layer = viewer.imageryLayers.addImageryProvider(new Cesium.WebMapServiceImageryProvider({
            url: "http://openlayers.vip/geoserver/cite/wms",
            // 必填
            layers: "cite:2000",
            parameters: parameters
        }));

        flyToRectangle();

    }

    // 清空
    function clearFunc() {
        layer && viewer.imageryLayers.remove(layer) , layer = undefined;
    }

    /**
     * @description: 飞行定位到一个矩形
     * @return {*}
     */
    function flyToRectangle(RectangleCD) {

        // 添加定位信息
        RectangleCD = RectangleCD || [
            Cesium.Cartesian3.fromDegrees(
                115.41380999600005,
                39.44197808500007,
                0
            ),
            Cesium.Cartesian3.fromDegrees(
                117.49920000500002,
                41.05928408300005,
                0
            ),
        ];

        var rec = Cesium.Rectangle.fromCartesianArray(RectangleCD);
        var boundingSphere = Cesium.BoundingSphere.fromRectangle3D(rec);
        viewer.camera.flyToBoundingSphere(boundingSphere, {
            duration: 2,
            complete: function () {
            },
            offset: {
                heading: Cesium.Math.toRadians(0.0),
                pitch: Cesium.Math.toRadians(-90),
                range: 0.0,
            },
        });
    }

script>
body>
html>


在线示例

Cesium 在线示例:Cesium 加载 Geoserver WMS 图层

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