图层切换

//版权信息
var fmapAttrib = '© FMap';
//瓦片路径
var url = {
  osmLayerUrl: "http://{s}.tile.osm.org/{z}/{x}/{y}.png",
  mixMapUrl: "http://map.botaisoft.com/apis/v1/rastertiles/mix_map/{z}/{x}/{y}.png?token={token}"
};
//图层配置
var baseLayers = {
  "OSM": FMap.tileLayer(url.osmLayerUrl, {attribution: fmapAttrib, minZoom: 1, maxZoom: 18}),
  "融合图": FMap.tileLayer(url.mixMapUrl, {attribution: fmapAttrib, minZoom: 1, maxZoom: 17})
};
//创建地图实例
var map = new FMap.Map(this.map.layers, {
  center: new FMap.LatLng(38.92705, 121.6580833),
  zoom: 6,
  layers: [baseLayers["OSM"]]
});
//添加图层选择控件
FMap.control.layers(baseLayers).addTo(map);