地图API_卫星地图_离线地图_地图可视化_离线地图二次开发

遮罩反选-源代码示例运行重置
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                    <!DOCTYPE html>
<html>
<head>
    <meta charset='UTF-8' />
    <meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no'/>
    <link href='http://bigemap.com:9000/bigemap-gl.js/v1.1.0/Widgets/widgets.css' rel='stylesheet'/>
    <script src='http://bigemap.com:9000/bigemap-gl.js/v1.1.0/bigemap-gl.js'></script>
    <style>
        
        body { margin: 0; padding: 0; }
        #container { position: absolute; top: 0; bottom: 0; width: 100%; }
        .bmgl-widget-credits{display:none}
    </style>
    <title>Google Map Streets</title>
</head>
<body>
    <div id='container'>
    </div>
    
    <script>
        bmgl.Config.HTTP_URL = 'http://bigemap.com:9000';
        var viewer = new bmgl.Viewer('container', { mapId: 'bigemap.zhongkexingtu',infoBox:false,selectionIndicator:false});
        if (bmgl.FeatureDetection.supportsImageRenderingPixelated()) {
                viewer.resolutionScale = window.devicePixelRatio;
         }
        //开启抗锯齿,让图像更加顺滑
        viewer.scene.postProcessStages.fxaa.enabled = true;
        fetch(`/offline_data/cd.geojson`)
        .then(response => {return response.json()})
        .then(response => {
            var fs = response.features[0].geometry.coordinates[0];
            var maskspoint = bmgl.Cartesian3.fromDegreesArray(fs.flat())
            console.log("myfs",fs);
                var area = new bmgl.Entity({
                  polygon: {
                    hierarchy: {
                        // 定义多边形或孔外边界的线性环。
                        positions: bmgl.Cartesian3.fromDegreesArray([
                            10, 0, 10, 89, 160, 89, 160, 0,
                        ]), 
                        // 一组多边形层次结构，定义多边形中的孔。
                        holes: [
                            {
                                positions: maskspoint, //挖空区域
                            },
                        ],
                    },
                    // 填充多边形的材质
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