web开发,叠加了天地图底图图层之后,地图只能放大到一定层级,但是其他图层的数据需要继续放大才能显现完整,看的清楚,请问需要如何解决?

        if (!map) {
            //TODO:利用浏览器单线程工作的特性,保证setTimeout中的代码在re-draw完成之后执行。
            setTimeout(function(){
                map = new SuperMap.Map("mapContainer2D");
                map.addControl(new SuperMap.Control.MousePosition());
                map.allOverlays = true;
                map.maxZoom =25;
                var supScene=URL_CONFIG.SupScene;
                tiandituLayer = new SuperMap.Layer.WMTS({
                    name: "vec",
                    url: "http://t0.tianditu.com/vec_c/wmts?tk=1d109683f4d84198e37a38c442d68311",
                    layer: "vec",
                    style: "default",
                    matrixSet: "c",
                    format: "tiles",
                    opacity: 1,
                    requestEncoding: "KVP"
                });
                tianMarkerLayer = new SuperMap.Layer.WMTS({
                    name: "vec",
                    url: "http://t0.tianditu.com/cva_c/wmts?tk=1d109683f4d84198e37a38c442d68311",
                    layer: "cva",
                    style: "default",
                    matrixSet: "c",
                    format: "tiles",
                    opacity: 1,
                    requestEncoding: "KVP"
                });
                tianMarkerLayer.layerType = "cva";
                tianMarkerLayer.isLabel = true;
                for (var i=0;i<supScene.length;i++) {
                    if (supScene[i].GWServerUrl) {
                        layer = new SuperMap.Layer.TiledDynamicRESTLayer("Map", supScene[i].MapSerUrl, {
                            transparent: true, cacheEnabled: true
                        }, {maxResolution: "auto"});
                        layer.events.on({"layerInitialized": addLayer});
                        break;
                    }
                }               
            }, 100);         
        }
        function addLayer() {
             map.addLayers([tiandituLayer, layer, tianMarkerLayer]);
             map.addLayers([layer]);
                map.setCenter(new SuperMap.LonLat(URL_CONFIG.mapCenter), 0);
                //添加地图监听事件
                if (layer != undefined) {
                    that.props.onChange({map: map});
                }           
        };