cesium加载OGC标准WMS服务，需要空间范围查询过滤，可以使用CQL过滤器进行多边形范围查询。

const viewer = new Cesium.Viewer("cesiumContainer", {});

let wmsImageryProvider = new Cesium.WebMapServiceImageryProvider({
				
		url: "http://localhost:8080/geoserver/test/wms",
		layers: "test:testlayer", 
		parameters: {
			service: "WMS",
			format: "image/png",
			styles: "",
			transparent: true,
			// 使用CQL过滤器进行多边形范围查询
			CQL_FILTER: "INTERSECTS(the_geom, POLYGON((126.7778 23.54559, 126.80321 23.58576, 126.85677 23.5758, 126.83067 23.51847, 126.7778 23.54559)))",
				},
			});
viewer.imageryLayers.addImageryProvider(wmsImageryProvider);