add：人员坐标贴合模型

src/views/index.vue

@@ -843,6 +843,7 @@ export default {
               billboard: {
                 image: "/poi-marker-default.png",
                 scale: 0.5,
+                heightReference: Cesium.HeightReference.CLAMP_TO_3D_TILE,
               },
               description: `<div><h4>${item.perName}${item.status}</h4></div>`,
               fixedFrame: Cesium.Transforms.eastNorthUpToFixedFrame(position),