mapInfo = {
    "mapName": "YCLKWCS",
    "rackCount": 8,
    "crnCount": 2,
    "stbCount": 8,
    "hpPosition": 1,
    "minBayNo": 2,
    "floors": 1,
    "racks": [{
        "type": "rack",
        "id": "rack8",
        "top": 371,
        "left": 179,
        "width": 1400,
        "height": 20,
        "minBayNo": 1,
        "maxBayNo": 34
    }, {
        "type": "rack",
        "id": "rack6",
        "top": 302,
        "left": 179,
        "width": 1400,
        "height": 20,
        "minBayNo": 1,
        "maxBayNo": 34
    }, {
        "type": "rack",
        "id": "rack7",
        "top": 350,
        "left": 179,
        "width": 1400,
        "height": 20,
        "minBayNo": 1,
        "maxBayNo": 34
    }, {
        "type": "rack",
        "id": "rack5",
        "top": 281,
        "left": 179,
        "width": 1400,
        "height": 20,
        "minBayNo": 1,
        "maxBayNo": 34
    }],
    "rackDescs": [{
        "type": "rackDescs",
        "id": "lb_desc1",
        "text": "#4",
        "top": 250,
        "left": 203,
        "width": 30,
        "height": 23
    }, {
        "type": "rackDescs",
        "id": "lb_desc16",
        "text": "#1",
        "top": 395,
        "left": 203,
        "width": 33,
        "height": 23
    }],
    "crns": [{
        "type": "crane",
        "id": "crn-1",
        "text": "1",
        "top": 325,
        "left": 929,
        "width": 93,
        "height": 22
    },{
        "type": "track",
        "id": "lb_track1",
        "text": "",
        "top": 335,
        "left": 169,
        "width": 1420,
        "height": 2
    }],
    "areas": [{
        "type": "Control_floor",
        "id": "tabControl_floor1",
        "text": "楼层",
        "top": 68,
        "left": 80,
        "width": 1341,
        "height": 446,
        "floors": [{
            "type": "floor",
            "id": "page_floor1",
            "text": "1F",
            "top": 4,
            "left": 22,
            "width": 1315,
            "height": 438,
            "stns": [{
                "type": "stn",
                "id": "site-101",
                "text": "101",
                "top": 356,
                "left": 838,
                "width": 41,
                "height": 40
            },{
                "type": "stn",
                "id": "site-100",
                "text": "100",
                "top": 397,
                "left": 838,
                "width": 41,
                "height": 40
            },{
                "type": "stn",
                "id": "site-103",
                "text": "101",
                "top": 356,
                "left": 796,
                "width": 41,
                "height": 40
            },{
                "type": "stn",
                "id": "site-102",
                "text": "100",
                "top": 397,
                "left": 796,
                "width": 41,
                "height": 40
            }]
        }]
    }]
}