mapInfo = {
    "mapName": "ZJFNWCS",
    "rackCount": 4,
    "crnCount": 2,
    "stbCount": 13,
    "hpPosition": 1,
    "minBayNo": 1,
    "floors": 1,
    "racks": [{
        "type": "rack",
        "id": "rack1",
        "top": 260,
        "left": 167,
        "width": 794,
        "height": 23,
        "minBayNo": 1,
        "maxBayNo": 14
    }, {
        "type": "rack",
        "id": "rack2",
        "top": 200,
        "left": 167,
        "width": 794,
        "height": 23,
        "minBayNo": 1,
        "maxBayNo": 14
    },{
        "type": "rack",
        "id": "rack3",
        "top": 177,
        "left": 167,
        "width": 794,
        "height": 23,
        "minBayNo": 1,
        "maxBayNo": 14
    },],
    "rackDescs": [{
        "type": "rackDescs",
        "id": "lb_desc1",
        "text": "#3",
        "top": 177,
        "left": 129,
        "width": 30,
        "height": 23
    }, {
        "type": "rackDescs",
        "id": "lb_desc16",
        "text": "#1",
        "top": 259,
        "left": 129,
        "width": 33,
        "height": 23
    }],
    "crns": [{
        "type": "crane",
        "id": "crn-1",
        "text": "1",
        "top": 232,
        "left": 436,
        "width": 93,
        "height": 22
    }, {
        "type": "track",
        "id": "lb_track5",
        "text": "",
        "top": 243,
        "left": 180,
        "width": 830,
        "height": 2
    }],
    "areas": [{
        "type": "Control_floor",
        "id": "tabControl_floor1",
        "text": "楼层",
        "top": 68,
        "left": 80,
        "width": 1438,
        "height": 513,
        "floors": [{
            "type": "floor",
            "id": "page_floor1",
            "text": "2F",
            "top": 4,
            "left": 22,
            "width": 1412,
            "height": 505,
            "stns": [{
                "type": "stn",
                "id": "site-202",
                "text": "202",
                "top": 260,
                "left": 960,
                "width": 80,
                "height": 23
            }, {
                "type": "stn",
                "id": "site-201",
                "text": "201",
                "top": 260,
                "left": 1041,
                "width": 80,
                "height": 23
            }, {
                "type": "stn",
                "id": "site-203",
                "text": "203",
                "top": 200,
                "left": 960,
                "width": 80,
                "height": 23
            }, {
                "type": "stn",
                "id": "site-204",
                "text": "204",
                "top": 200,
                "left": 1041,
                "width": 80,
                "height": 23
            }]
        }]
    }]
}