mapInfo = {
    "mapName": "WCS",
    "rackCount": 4,
    "crnCount": 1,
    "stbCount": 10,
    "hpPosition": 0,
    "minBayNo": 1,
    "floors": 2,
    "racks": [{
        "type": "rack",
        "id": "rack4",
        "top": 351,
        "left": 577,
        "width": 528,
        "height": 32,
        "minBayNo": 1,
        "maxBayNo": 4
    }, {
        "type": "rack",
        "id": "rack1",
        "top": 200,
        "left": 577,
        "width": 528,
        "height": 32,
        "minBayNo": 1,
        "maxBayNo": 4
    }, {
        "type": "rack",
        "id": "rack2",
        "top": 234,
        "left": 577,
        "width": 528,
        "height": 32,
        "minBayNo": 1,
        "maxBayNo": 4
    }, {
        "type": "rack",
        "id": "rack3",
        "top": 317,
        "left": 577,
        "width": 528,
        "height": 32,
        "minBayNo": 1,
        "maxBayNo": 4
    }],
    "rackDescs": [{
        "type": "rackDescs",
        "id": "lb_desc2",
        "text": "#2",
        "top": 237,
        "left": 1154,
        "width": 33,
        "height": 23
    }, {
        "type": "rackDescs",
        "id": "lb_desc3",
        "text": "#3",
        "top": 317,
        "left": 1154,
        "width": 32,
        "height": 23
    }, {
        "type": "rackDescs",
        "id": "lb_desc1",
        "text": "#1",
        "top": 200,
        "left": 1154,
        "width": 30,
        "height": 23
    }, {
        "type": "rackDescs",
        "id": "lb_desc4",
        "text": "#4",
        "top": 360,
        "left": 1151,
        "width": 33,
        "height": 23
    }],
    "crns": [{
        "type": "track",
        "id": "lb_track1",
        "text": "",
        "top": 293,
        "left": 539,
        "width": 600,
        "height": 2
    }, {
        "type": "crane",
        "id": "crn-1",
        "text": "1",
        "top": 284,
        "left": 833,
        "width": 93,
        "height": 22
    }],
    "areas": [{
        "type": "Control_floor",
        "id": "tabControl_floor1",
        "text": "楼层",
        "top": 64,
        "left": 80,
        "width": 1389,
        "height": 666,
        "floors": [{
            "type": "floor",
            "id": "page_floor1",
            "text": "1F",
            "top": 4,
            "left": 22,
            "width": 1363,
            "height": 658,
            "stns": [{
                "type": "stn",
                "id": "site-102",
                "text": "102",
                "top": 318,
                "left": 342,
                "width": 91,
                "height": 32
            }, {
                "type": "stn",
                "id": "site-101",
                "text": "101",
                "top": 351,
                "left": 342,
                "width": 91,
                "height": 32
            }, {
                "type": "stn",
                "id": "site-103",
                "text": "103",
                "top": 318,
                "left": 434,
                "width": 141,
                "height": 32
            }, {
                "type": "stn",
                "id": "site-104",
                "text": "104",
                "top": 235,
                "left": 448,
                "width": 127,
                "height": 32
            }]
        }, {
            "type": "floor",
            "id": "page_floor2",
            "text": "2F",
            "top": 4,
            "left": 22,
            "width": 1363,
            "height": 658,
            "stns": [{
                "type": "stn",
                "id": "site-202",
                "text": "202",
                "top": 386,
                "left": 978,
                "width": 127,
                "height": 32
            }, {
                "type": "stn",
                "id": "site-201",
                "text": "201",
                "top": 420,
                "left": 978,
                "width": 127,
                "height": 32
            }, {
                "type": "stn",
                "id": "site-212",
                "text": "212",
                "top": 386,
                "left": 577,
                "width": 160,
                "height": 32
            }, {
                "type": "stn",
                "id": "site-200",
                "text": "200",
                "top": 454,
                "left": 978,
                "width": 127,
                "height": 32
            }, {
                "type": "stn",
                "id": "site-211",
                "text": "211",
                "top": 420,
                "left": 577,
                "width": 160,
                "height": 32
            }, {
                "type": "stn",
                "id": "site-210",
                "text": "210",
                "top": 454,
                "left": 577,
                "width": 160,
                "height": 32
            }]
        }]
    }]
}