mapInfo = {
    "mapName": "jkxcwcs",
    "rackCount": 4,
    "crnCount": 1,
    "stbCount": 4,
    "hpPosition": 1,
    "minBayNo": 1,
    "floors": 1,
    "racks": [{
        "type": "rack",
        "id": "rack1",
        "top": 200,
        "left": 458,
        "width": 796,
        "height": 23,
        "minBayNo": 1,
        "maxBayNo": 40
    }, {
        "type": "rack",
        "id": "rack2",
        "top": 224,
        "left": 458,
        "width": 796,
        "height": 23,
        "minBayNo": 1,
        "maxBayNo": 20
    }, {
        "type": "rack",
        "id": "rack3",
        "top": 298,
        "left": 458,
        "width": 796,
        "height": 23,
        "minBayNo": 1,
        "maxBayNo": 20
    }, {
        "type": "rack",
        "id": "rack4",
        "top": 322,
        "left": 458,
        "width": 796,
        "height": 23,
        "minBayNo": 1,
        "maxBayNo": 20
    }],
    "rackDescs": [{
        "type": "rackDescs",
        "id": "lb_desc17",
        "text": "#1",
        "top": 200,
        "left": 380,
        "width": 30,
        "height": 23
    }, {
        "type": "rackDescs",
        "id": "lb_desc16",
        "text": "#4",
        "top": 322,
        "left": 377,
        "width": 33,
        "height": 23
    }],
    "crns": [{
        "type": "track",
        "id": "lb_track1",
        "text": "",
        "top": 269,
        "left": 442,
        "width": 850,
        "height": 2
    }, {
        "type": "crane",
        "id": "crn-1",
        "text": "1",
        "top": 258,
        "left": 736,
        "width": 93,
        "height": 22
    }],
    "areas": [{
        "type": "Control_floor",
        "id": "tabControl_floor1",
        "text": "楼层",
        "top": 66,
        "left": 80,
        "width": 1416,
        "height": 623,
        "floors": [{
            "type": "floor",
            "id": "page_floor1",
            "text": "1F",
            "top": 4,
            "left": 22,
            "width": 1390,
            "height": 615,
            "stns": [{
                "type": "stn",
                "id": "site-100",
                "text": "100",
                "top": 298,
                "left": 1255,
                "width": 73,
                "height": 23
            }, {
                "type": "stn",
                "id": "site-103",
                "text": "103",
                "top": 223,
                "left": 1255,
                "width": 101,
                "height": 23
            }, {
                "type": "stn",
                "id": "site-102",
                "text": "102",
                "top": 223,
                "left": 1358,
                "width": 101,
                "height": 23
            }, {
                "type": "stn",
                "id": "site-101",
                "text": "101",
                "top": 298,
                "left": 1330,
                "width": 73,
                "height": 23
            }]
        }]
    }]
}