mapInfo = {"mapName":"WCS","rackCount":16,"crnCount":4,"stbCount":16,"hpPosition":1,"minBayNo":2,"floors":1,"racks":[
        {"type":"rack","id":"rack13","top":341,"left":400,"width":1100,"height":20,"minBayNo":1,"maxBayNo":15},
        {"type":"rack","id":"rack12","top":302,"left":400,"width":1100,"height":20,"minBayNo":1,"maxBayNo":15},
    ],
    "crns":[
        {"type":"track","id":"lb_track4","text":"","top":333,"left":400,"width":1100,"height":1},
        {"type":"crane","id":"crn-1","text":"1","top":325,"left":1450,"width":67,"height":13},
    ],
    "areas":[{"type":"Control_floor","id":"tabControl_floor1","text":"楼层","top":41,"left":80,"width":1269,"height":781,"floors":[
        {"type":"floor","id":"page_floor1","text":"1F","top":4,"left":22,"width":1243,"height":773,"stns":
                [
                    {"type":"stn","id":"site-401","text":"401","top":287,"left":1433,"width":67,"height":17},
                    {"type":"stn","id":"site-402","text":"402","top":287,"left":400,"width":67,"height":17},
                ]}]}]}