T=cva_w&x={x}&y={y}&l={z}&tk="+this.tk }),zIndex:2});//天地图路网let roadLayer =newTileLayer({title:"天地图路网",source:newXYZ({projection: defaultsMap.projection,url:"http://t4.tianditu.com/DataServer?T=vec_c&x={x}&y={y}&l={z}&tk="+this.tk }),zIndex:1});//...