      map.addLayer(TiandiMap_vectcia);

            //加载测量的绘制矢量层
            vectorSource = new ol.source.Vector(); //图层数据源
            var vectorLayer = new ol.layer.Vector({
                source: vectorSource,
                style: new ol.style.Style({ //图层样式
                    fill: new ol.style.Fill({
                        color: 'rgba(255, 255, 255, 0.2)' //填充颜色
                    }),
                    stroke: new ol.style.Stroke({
                