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CSS

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HTML

              
                <script type="text/javascript" src="https://www.amcharts.com/lib/3/ammap.js"></script>
<script type="text/javascript" src="https://www.amcharts.com/lib/3/maps/js/continentsLow.js"></script>
<script type="text/javascript" src="https://www.amcharts.com/lib/3/themes/black.js"></script>
<script type="text/javascript" src="https://www.amcharts.com/lib/box2d/Box2dWeb-2.1.a.3.min.js"></script>

<div id="chartdiv" style="width: 100%; height: 600px; margin:auto"></div>
<input type="button" id="btn" class="btn" style="position:absolute; bottom: 50px; left:50px;" value="run demo" onclick="startInterval();"></input>
<!--<canvas id="canvas" width="1000px" height="700px"></canvas>-->
              
            
!

CSS

              
                @import url(https://fonts.googleapis.com/css?family=Lato:400);

body {
  font-family:Lato,Tahoma;
  color:#e7e7e7;
  font-size:1em;
  background-color:#222;
}

.btn {
  -webkit-border-radius: 3;
  -moz-border-radius: 3;
  border:0;
  border-radius: 3px;
  color: #ffffff;
  font-size: 15px;
  background: #3d5296;
  padding: 10px 20px 10px 20px;
  text-decoration: none;
}

.btn:hover {
  background: #4462c6;
  text-decoration: none;
}

              
            
!

JS

              
                     /*
    although ammap has methods like getAreaCenterLatitude and getAreaCenterLongitude,
    they are not suitable in quite a lot of cases as the center of some countries
    is even outside the country itself (like US, because of Alaska and Hawaii)
    That's why we have the coordinates stored here
    */

     var latlong = {};
     latlong["AD"] = {
         "latitude": 42.5,
         "longitude": 1.5
     };
     latlong["AE"] = {
         "latitude": 24,
         "longitude": 54
     };
     latlong["AF"] = {
         "latitude": 33,
         "longitude": 65
     };
     latlong["AG"] = {
         "latitude": 17.05,
         "longitude": -61.8
     };
     latlong["AI"] = {
         "latitude": 18.25,
         "longitude": -63.1667
     };
     latlong["AL"] = {
         "latitude": 41,
         "longitude": 20
     };
     latlong["AM"] = {
         "latitude": 40,
         "longitude": 45
     };
     latlong["AN"] = {
         "latitude": 12.25,
         "longitude": -68.75
     };
     latlong["AO"] = {
         "latitude": -12.5,
         "longitude": 18.5
     };
     latlong["AP"] = {
         "latitude": 35,
         "longitude": 105
     };
     latlong["AQ"] = {
         "latitude": -90,
         "longitude": 0
     };
     latlong["AR"] = {
         "latitude": -34,
         "longitude": -64
     };
     latlong["AS"] = {
         "latitude": -14.3333,
         "longitude": -170
     };
     latlong["AT"] = {
         "latitude": 47.3333,
         "longitude": 13.3333
     };
     latlong["AU"] = {
         "latitude": -27,
         "longitude": 133
     };
     latlong["AW"] = {
         "latitude": 12.5,
         "longitude": -69.9667
     };
     latlong["AZ"] = {
         "latitude": 40.5,
         "longitude": 47.5
     };
     latlong["BA"] = {
         "latitude": 44,
         "longitude": 18
     };
     latlong["BB"] = {
         "latitude": 13.1667,
         "longitude": -59.5333
     };
     latlong["BD"] = {
         "latitude": 24,
         "longitude": 90
     };
     latlong["BE"] = {
         "latitude": 50.8333,
         "longitude": 4
     };
     latlong["BF"] = {
         "latitude": 13,
         "longitude": -2
     };
     latlong["BG"] = {
         "latitude": 43,
         "longitude": 25
     };
     latlong["BH"] = {
         "latitude": 26,
         "longitude": 50.55
     };
     latlong["BI"] = {
         "latitude": -3.5,
         "longitude": 30
     };
     latlong["BJ"] = {
         "latitude": 9.5,
         "longitude": 2.25
     };
     latlong["BM"] = {
         "latitude": 32.3333,
         "longitude": -64.75
     };
     latlong["BN"] = {
         "latitude": 4.5,
         "longitude": 114.6667
     };
     latlong["BO"] = {
         "latitude": -17,
         "longitude": -65
     };
     latlong["BR"] = {
         "latitude": -10,
         "longitude": -55
     };
     latlong["BS"] = {
         "latitude": 24.25,
         "longitude": -76
     };
     latlong["BT"] = {
         "latitude": 27.5,
         "longitude": 90.5
     };
     latlong["BV"] = {
         "latitude": -54.4333,
         "longitude": 3.4
     };
     latlong["BW"] = {
         "latitude": -22,
         "longitude": 24
     };
     latlong["BY"] = {
         "latitude": 53,
         "longitude": 28
     };
     latlong["BZ"] = {
         "latitude": 17.25,
         "longitude": -88.75
     };
     latlong["CA"] = {
         "latitude": 54,
         "longitude": -100
     };
     latlong["CC"] = {
         "latitude": -12.5,
         "longitude": 96.8333
     };
     latlong["CD"] = {
         "latitude": 0,
         "longitude": 25
     };
     latlong["CF"] = {
         "latitude": 7,
         "longitude": 21
     };
     latlong["CG"] = {
         "latitude": -1,
         "longitude": 15
     };
     latlong["CH"] = {
         "latitude": 47,
         "longitude": 8
     };
     latlong["CI"] = {
         "latitude": 8,
         "longitude": -5
     };
     latlong["CK"] = {
         "latitude": -21.2333,
         "longitude": -159.7667
     };
     latlong["CL"] = {
         "latitude": -30,
         "longitude": -71
     };
     latlong["CM"] = {
         "latitude": 6,
         "longitude": 12
     };
     latlong["CN"] = {
         "latitude": 35,
         "longitude": 105
     };
     latlong["CO"] = {
         "latitude": 4,
         "longitude": -72
     };
     latlong["CR"] = {
         "latitude": 10,
         "longitude": -84
     };
     latlong["CU"] = {
         "latitude": 21.5,
         "longitude": -80
     };
     latlong["CV"] = {
         "latitude": 16,
         "longitude": -24
     };
     latlong["CX"] = {
         "latitude": -10.5,
         "longitude": 105.6667
     };
     latlong["CY"] = {
         "latitude": 35,
         "longitude": 33
     };
     latlong["CZ"] = {
         "latitude": 49.75,
         "longitude": 15.5
     };
     latlong["DE"] = {
         "latitude": 51,
         "longitude": 9
     };
     latlong["DJ"] = {
         "latitude": 11.5,
         "longitude": 43
     };
     latlong["DK"] = {
         "latitude": 56,
         "longitude": 10
     };
     latlong["DM"] = {
         "latitude": 15.4167,
         "longitude": -61.3333
     };
     latlong["DO"] = {
         "latitude": 19,
         "longitude": -70.6667
     };
     latlong["DZ"] = {
         "latitude": 28,
         "longitude": 3
     };
     latlong["EC"] = {
         "latitude": -2,
         "longitude": -77.5
     };
     latlong["EE"] = {
         "latitude": 59,
         "longitude": 26
     };
     latlong["EG"] = {
         "latitude": 27,
         "longitude": 30
     };
     latlong["EH"] = {
         "latitude": 24.5,
         "longitude": -13
     };
     latlong["ER"] = {
         "latitude": 15,
         "longitude": 39
     };
     latlong["ES"] = {
         "latitude": 40,
         "longitude": -4
     };
     latlong["ET"] = {
         "latitude": 8,
         "longitude": 38
     };
     latlong["EU"] = {
         "latitude": 47,
         "longitude": 8
     };
     latlong["FI"] = {
         "latitude": 62,
         "longitude": 26
     };
     latlong["FJ"] = {
         "latitude": -18,
         "longitude": 175
     };
     latlong["FK"] = {
         "latitude": -51.75,
         "longitude": -59
     };
     latlong["FM"] = {
         "latitude": 6.9167,
         "longitude": 158.25
     };
     latlong["FO"] = {
         "latitude": 62,
         "longitude": -7
     };
     latlong["FR"] = {
         "latitude": 46,
         "longitude": 2
     };
     latlong["GA"] = {
         "latitude": -1,
         "longitude": 11.75
     };
     latlong["GB"] = {
         "latitude": 54,
         "longitude": -2
     };
     latlong["GD"] = {
         "latitude": 12.1167,
         "longitude": -61.6667
     };
     latlong["GE"] = {
         "latitude": 42,
         "longitude": 43.5
     };
     latlong["GF"] = {
         "latitude": 4,
         "longitude": -53
     };
     latlong["GH"] = {
         "latitude": 8,
         "longitude": -2
     };
     latlong["GI"] = {
         "latitude": 36.1833,
         "longitude": -5.3667
     };
     latlong["GL"] = {
         "latitude": 72,
         "longitude": -40
     };
     latlong["GM"] = {
         "latitude": 13.4667,
         "longitude": -16.5667
     };
     latlong["GN"] = {
         "latitude": 11,
         "longitude": -10
     };
     latlong["GP"] = {
         "latitude": 16.25,
         "longitude": -61.5833
     };
     latlong["GQ"] = {
         "latitude": 2,
         "longitude": 10
     };
     latlong["GR"] = {
         "latitude": 39,
         "longitude": 22
     };
     latlong["GS"] = {
         "latitude": -54.5,
         "longitude": -37
     };
     latlong["GT"] = {
         "latitude": 15.5,
         "longitude": -90.25
     };
     latlong["GU"] = {
         "latitude": 13.4667,
         "longitude": 144.7833
     };
     latlong["GW"] = {
         "latitude": 12,
         "longitude": -15
     };
     latlong["GY"] = {
         "latitude": 5,
         "longitude": -59
     };
     latlong["HK"] = {
         "latitude": 22.25,
         "longitude": 114.1667
     };
     latlong["HM"] = {
         "latitude": -53.1,
         "longitude": 72.5167
     };
     latlong["HN"] = {
         "latitude": 15,
         "longitude": -86.5
     };
     latlong["HR"] = {
         "latitude": 45.1667,
         "longitude": 15.5
     };
     latlong["HT"] = {
         "latitude": 19,
         "longitude": -72.4167
     };
     latlong["HU"] = {
         "latitude": 47,
         "longitude": 20
     };
     latlong["ID"] = {
         "latitude": -5,
         "longitude": 120
     };
     latlong["IE"] = {
         "latitude": 53,
         "longitude": -8
     };
     latlong["IL"] = {
         "latitude": 31.5,
         "longitude": 34.75
     };
     latlong["IN"] = {
         "latitude": 20,
         "longitude": 77
     };
     latlong["IO"] = {
         "latitude": -6,
         "longitude": 71.5
     };
     latlong["IQ"] = {
         "latitude": 33,
         "longitude": 44
     };
     latlong["IR"] = {
         "latitude": 32,
         "longitude": 53
     };
     latlong["IS"] = {
         "latitude": 65,
         "longitude": -18
     };
     latlong["IT"] = {
         "latitude": 42.8333,
         "longitude": 12.8333
     };
     latlong["JM"] = {
         "latitude": 18.25,
         "longitude": -77.5
     };
     latlong["JO"] = {
         "latitude": 31,
         "longitude": 36
     };
     latlong["JP"] = {
         "latitude": 36,
         "longitude": 138
     };
     latlong["KE"] = {
         "latitude": 1,
         "longitude": 38
     };
     latlong["KG"] = {
         "latitude": 41,
         "longitude": 75
     };
     latlong["KH"] = {
         "latitude": 13,
         "longitude": 105
     };
     latlong["KI"] = {
         "latitude": 1.4167,
         "longitude": 173
     };
     latlong["KM"] = {
         "latitude": -12.1667,
         "longitude": 44.25
     };
     latlong["KN"] = {
         "latitude": 17.3333,
         "longitude": -62.75
     };
     latlong["KP"] = {
         "latitude": 40,
         "longitude": 127
     };
     latlong["KR"] = {
         "latitude": 37,
         "longitude": 127.5
     };
     latlong["KW"] = {
         "latitude": 29.3375,
         "longitude": 47.6581
     };
     latlong["KY"] = {
         "latitude": 19.5,
         "longitude": -80.5
     };
     latlong["KZ"] = {
         "latitude": 48,
         "longitude": 68
     };
     latlong["LA"] = {
         "latitude": 18,
         "longitude": 105
     };
     latlong["LB"] = {
         "latitude": 33.8333,
         "longitude": 35.8333
     };
     latlong["LC"] = {
         "latitude": 13.8833,
         "longitude": -61.1333
     };
     latlong["LI"] = {
         "latitude": 47.1667,
         "longitude": 9.5333
     };
     latlong["LK"] = {
         "latitude": 7,
         "longitude": 81
     };
     latlong["LR"] = {
         "latitude": 6.5,
         "longitude": -9.5
     };
     latlong["LS"] = {
         "latitude": -29.5,
         "longitude": 28.5
     };
     latlong["LT"] = {
         "latitude": 55,
         "longitude": 24
     };
     latlong["LU"] = {
         "latitude": 49.75,
         "longitude": 6
     };
     latlong["LV"] = {
         "latitude": 57,
         "longitude": 25
     };
     latlong["LY"] = {
         "latitude": 25,
         "longitude": 17
     };
     latlong["MA"] = {
         "latitude": 32,
         "longitude": -5
     };
     latlong["MC"] = {
         "latitude": 43.7333,
         "longitude": 7.4
     };
     latlong["MD"] = {
         "latitude": 47,
         "longitude": 29
     };
     latlong["ME"] = {
         "latitude": 42.5,
         "longitude": 19.4
     };
     latlong["MG"] = {
         "latitude": -20,
         "longitude": 47
     };
     latlong["MH"] = {
         "latitude": 9,
         "longitude": 168
     };
     latlong["MK"] = {
         "latitude": 41.8333,
         "longitude": 22
     };
     latlong["ML"] = {
         "latitude": 17,
         "longitude": -4
     };
     latlong["MM"] = {
         "latitude": 22,
         "longitude": 98
     };
     latlong["MN"] = {
         "latitude": 46,
         "longitude": 105
     };
     latlong["MO"] = {
         "latitude": 22.1667,
         "longitude": 113.55
     };
     latlong["MP"] = {
         "latitude": 15.2,
         "longitude": 145.75
     };
     latlong["MQ"] = {
         "latitude": 14.6667,
         "longitude": -61
     };
     latlong["MR"] = {
         "latitude": 20,
         "longitude": -12
     };
     latlong["MS"] = {
         "latitude": 16.75,
         "longitude": -62.2
     };
     latlong["MT"] = {
         "latitude": 35.8333,
         "longitude": 14.5833
     };
     latlong["MU"] = {
         "latitude": -20.2833,
         "longitude": 57.55
     };
     latlong["MV"] = {
         "latitude": 3.25,
         "longitude": 73
     };
     latlong["MW"] = {
         "latitude": -13.5,
         "longitude": 34
     };
     latlong["MX"] = {
         "latitude": 23,
         "longitude": -102
     };
     latlong["MY"] = {
         "latitude": 2.5,
         "longitude": 112.5
     };
     latlong["MZ"] = {
         "latitude": -18.25,
         "longitude": 35
     };
     latlong["NA"] = {
         "latitude": -22,
         "longitude": 17
     };
     latlong["NC"] = {
         "latitude": -21.5,
         "longitude": 165.5
     };
     latlong["NE"] = {
         "latitude": 16,
         "longitude": 8
     };
     latlong["NF"] = {
         "latitude": -29.0333,
         "longitude": 167.95
     };
     latlong["NG"] = {
         "latitude": 10,
         "longitude": 8
     };
     latlong["NI"] = {
         "latitude": 13,
         "longitude": -85
     };
     latlong["NL"] = {
         "latitude": 52.5,
         "longitude": 5.75
     };
     latlong["NO"] = {
         "latitude": 62,
         "longitude": 10
     };
     latlong["NP"] = {
         "latitude": 28,
         "longitude": 84
     };
     latlong["NR"] = {
         "latitude": -0.5333,
         "longitude": 166.9167
     };
     latlong["NU"] = {
         "latitude": -19.0333,
         "longitude": -169.8667
     };
     latlong["NZ"] = {
         "latitude": -41,
         "longitude": 174
     };
     latlong["OM"] = {
         "latitude": 21,
         "longitude": 57
     };
     latlong["PA"] = {
         "latitude": 9,
         "longitude": -80
     };
     latlong["PE"] = {
         "latitude": -10,
         "longitude": -76
     };
     latlong["PF"] = {
         "latitude": -15,
         "longitude": -140
     };
     latlong["PG"] = {
         "latitude": -6,
         "longitude": 147
     };
     latlong["PH"] = {
         "latitude": 13,
         "longitude": 122
     };
     latlong["PK"] = {
         "latitude": 30,
         "longitude": 70
     };
     latlong["PL"] = {
         "latitude": 52,
         "longitude": 20
     };
     latlong["PM"] = {
         "latitude": 46.8333,
         "longitude": -56.3333
     };
     latlong["PR"] = {
         "latitude": 18.25,
         "longitude": -66.5
     };
     latlong["PS"] = {
         "latitude": 32,
         "longitude": 35.25
     };
     latlong["PT"] = {
         "latitude": 39.5,
         "longitude": -8
     };
     latlong["PW"] = {
         "latitude": 7.5,
         "longitude": 134.5
     };
     latlong["PY"] = {
         "latitude": -23,
         "longitude": -58
     };
     latlong["QA"] = {
         "latitude": 25.5,
         "longitude": 51.25
     };
     latlong["RE"] = {
         "latitude": -21.1,
         "longitude": 55.6
     };
     latlong["RO"] = {
         "latitude": 46,
         "longitude": 25
     };
     latlong["RS"] = {
         "latitude": 44,
         "longitude": 21
     };
     latlong["RU"] = {
         "latitude": 60,
         "longitude": 100
     };
     latlong["RW"] = {
         "latitude": -2,
         "longitude": 30
     };
     latlong["SA"] = {
         "latitude": 25,
         "longitude": 45
     };
     latlong["SB"] = {
         "latitude": -8,
         "longitude": 159
     };
     latlong["SC"] = {
         "latitude": -4.5833,
         "longitude": 55.6667
     };
     latlong["SD"] = {
         "latitude": 15,
         "longitude": 30
     };
     latlong["SE"] = {
         "latitude": 62,
         "longitude": 15
     };
     latlong["SG"] = {
         "latitude": 1.3667,
         "longitude": 103.8
     };
     latlong["SH"] = {
         "latitude": -15.9333,
         "longitude": -5.7
     };
     latlong["SI"] = {
         "latitude": 46,
         "longitude": 15
     };
     latlong["SJ"] = {
         "latitude": 78,
         "longitude": 20
     };
     latlong["SK"] = {
         "latitude": 48.6667,
         "longitude": 19.5
     };
     latlong["SL"] = {
         "latitude": 8.5,
         "longitude": -11.5
     };
     latlong["SM"] = {
         "latitude": 43.7667,
         "longitude": 12.4167
     };
     latlong["SN"] = {
         "latitude": 14,
         "longitude": -14
     };
     latlong["SO"] = {
         "latitude": 10,
         "longitude": 49
     };
     latlong["SR"] = {
         "latitude": 4,
         "longitude": -56
     };
     latlong["ST"] = {
         "latitude": 1,
         "longitude": 7
     };
     latlong["SV"] = {
         "latitude": 13.8333,
         "longitude": -88.9167
     };
     latlong["SY"] = {
         "latitude": 35,
         "longitude": 38
     };
     latlong["SZ"] = {
         "latitude": -26.5,
         "longitude": 31.5
     };
     latlong["TC"] = {
         "latitude": 21.75,
         "longitude": -71.5833
     };
     latlong["TD"] = {
         "latitude": 15,
         "longitude": 19
     };
     latlong["TF"] = {
         "latitude": -43,
         "longitude": 67
     };
     latlong["TG"] = {
         "latitude": 8,
         "longitude": 1.1667
     };
     latlong["TH"] = {
         "latitude": 15,
         "longitude": 100
     };
     latlong["TJ"] = {
         "latitude": 39,
         "longitude": 71
     };
     latlong["TK"] = {
         "latitude": -9,
         "longitude": -172
     };
     latlong["TM"] = {
         "latitude": 40,
         "longitude": 60
     };
     latlong["TN"] = {
         "latitude": 34,
         "longitude": 9
     };
     latlong["TO"] = {
         "latitude": -20,
         "longitude": -175
     };
     latlong["TR"] = {
         "latitude": 39,
         "longitude": 35
     };
     latlong["TT"] = {
         "latitude": 11,
         "longitude": -61
     };
     latlong["TV"] = {
         "latitude": -8,
         "longitude": 178
     };
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         "code": "UA",
         "name": "Ukraine",
         "value": 45190180,
         "color": "#d8854f"
     }, {
         "code": "AE",
         "name": "United Arab Emirates",
         "value": 7890924,
         "color": "#eea638"
     }, {
         "code": "GB",
         "name": "United Kingdom",
         "value": 62417431,
         "color": "#d8854f"
     }, {
         "code": "US",
         "name": "United States",
         "value": 313085380,
         "color": "#a7a737"
     }, {
         "code": "UY",
         "name": "Uruguay",
         "value": 3380008,
         "color": "#86a965"
     }, {
         "code": "UZ",
         "name": "Uzbekistan",
         "value": 27760267,
         "color": "#eea638"
     }, {
         "code": "VE",
         "name": "Venezuela",
         "value": 29436891,
         "color": "#86a965"
     }, {
         "code": "PS",
         "name": "West Bank and Gaza",
         "value": 4152369,
         "color": "#eea638"
     }, {
         "code": "VN",
         "name": "Vietnam",
         "value": 88791996,
         "color": "#eea638"
     }, {
         "code": "YE",
         "name": "Yemen, Rep.",
         "value": 24799880,
         "color": "#eea638"
     }, {
         "code": "ZM",
         "name": "Zambia",
         "value": 13474959,
         "color": "#de4c4f"
     }, {
         "code": "ZW",
         "name": "Zimbabwe",
         "value": 12754378,
         "color": "#de4c4f"
     }];
      // AMMAP PART OF THIS AWESOME DEMO
     var map;
     var chinaImage;

      // set dark theme
     AmCharts.theme = AmCharts.themes.black;

      // get min and max values
     var min = Infinity;
     var max = -Infinity;
     for (var i = 0; i < mapData.length; i++) {
         var value = mapData[i].value;
         if (value < min) {
             min = value;
         }
         if (value > max) {
             max = value;
         }
     }

      // build map
     AmCharts.ready(function() {
         map = new AmCharts.AmMap();
         map.addClassNames = true;
         map.pathToImages = "https://www.amcharts.com/lib/3/images/";
         map.fontFamily = "Lato";
         map.fontSize = 12;
         map.creditsPosition = "top-right";
         map.zoomControl.buttonFillColor = "#343434";

         // style tooltip
         map.balloon = {
             adjustBorderColor: false,
             horizontalPadding: 20,
             verticalPadding: 10,
             color: "#FFFFFF",
             maxWidth: 300,
             borderAlpha: 0,
             borderThickness: 1
         }

         // bubbles are images, we set opacity and tooltip text
         map.imagesSettings = {
             balloonText: "[[title]]: [[value]]",
             alpha: 0.7
         }

         map.addClassNames = true;

         // make areas barely visible
         map.areasSettings = {
             unlistedAreasAlpha: 0.1,
             unlistedAreasOutlineAlpha: 0
         };

         // data provider. We use continents map to show real world map in background.
         var dataProvider = {
             map: "continentsLow",
             images: []
         }

        // min and max bullet sizes - adjust them to your needs
        var minBulletSize = 7;
        var maxBulletSize = 80;
 
      	// adjust size if window is small
      	if(document.getElementById("chartdiv").offsetWidth <= 700){
           minBulletSize = 6;
           maxBulletSize = 60;
        }         
         // create circle for each country
         var maxSquare = maxBulletSize * maxBulletSize * 2 * Math.PI;
         var minSquare = minBulletSize * minBulletSize * 2 * Math.PI;

         // create circle for each country
         for (var i = 0; i < mapData.length; i++) {
             var dataItem = mapData[i];
             var value = dataItem.value;
             // calculate size of a bubble
             var square = (value - min) / (max - min) * (maxSquare - minSquare) + minSquare;
             if (square < minSquare) {
                 square = minSquare;
             }
             var size = Math.sqrt(square / (Math.PI * 2));
             var id = dataItem.code;

             dataProvider.images.push({
                 type: "circle",
                 width: size,
                 height: size,
                 color: dataItem.color,
                 longitude: latlong[id].longitude,
                 latitude: latlong[id].latitude,
                 title: dataItem.name,
                 value: value
             });

             if (id == "CN") {
                 chinaImage = dataProvider.images[dataProvider.images.length - 1];
             }
         }

         map.dataProvider = dataProvider;

         // Listen for the init event and initialize box2d part
         map.addListener("init", initBox2D)

         map.write("chartdiv");
     });


      // BOX2D (Physics) part
     var width = 900;
     var height = 600;
     var pixels2meters = 30; // box2d uses meters, not pixels and this is ratio
     var framesPerSecond = 30;
     var world;
     var images;

     function initBox2D() {
         var b2Vec2 = Box2D.Common.Math.b2Vec2;
         var b2BodyDef = Box2D.Dynamics.b2BodyDef;
         var b2Body = Box2D.Dynamics.b2Body;
         var b2FixtureDef = Box2D.Dynamics.b2FixtureDef;
         var b2Fixture = Box2D.Dynamics.b2Fixture;
         var b2World = Box2D.Dynamics.b2World;
         var b2PolygonShape = Box2D.Collision.Shapes.b2PolygonShape;
         var b2CircleShape = Box2D.Collision.Shapes.b2CircleShape;
         var b2DistanceJointDef = Box2D.Dynamics.Joints.b2DistanceJointDef;
         var b2DebugDraw = Box2D.Dynamics.b2DebugDraw;


         world = new b2World(
             new b2Vec2(0, 0), //gravity
             false //allow sleep, false otherwise joints might not be restored
         );

         // bubbles
         var bubbleBodyDef = new b2BodyDef();
         bubbleBodyDef.angularDamping = 3; // we don't want to bubbles to rotate like crazy
         bubbleBodyDef.linearDamping = 0.5; // makes movement more smooth. If you increase this value, bubbles will move like in some oil
         bubbleBodyDef.type = b2Body.b2_dynamicBody;

         var bubbleFixtureDef = new b2FixtureDef();
         bubbleFixtureDef.density = 0.2;
         bubbleFixtureDef.friction = 0.3;
         bubbleFixtureDef.restitution = 0.6; // adjust this property to reduce or increase bouncing

         // now, loop through images of map's data provider
         images = map.dataProvider.images;

         for (var i = 0; i < images.length; i++) {
             var image = images[i];

             // create bubble
             bubbleFixtureDef.shape = new b2CircleShape(image.width / 2 / pixels2meters);
             bubbleBodyDef.position.x = image.displayObject.x / pixels2meters;
             bubbleBodyDef.position.y = image.displayObject.y / pixels2meters;
             var bubble = world.CreateBody(bubbleBodyDef).CreateFixture(bubbleFixtureDef);

             // store bubble and fixture in mapImage object
             image.box2Dimage = bubble;
         }

         //setup debug draw (if you don't need it, just delete the lines, uncomment to see how box objects are drawn)
         /*
            var debugDraw = new b2DebugDraw();
            debugDraw.SetSprite(document.getElementById("canvas").getContext("2d"));
            debugDraw.SetDrawScale(pixels2meters);
            debugDraw.SetFillAlpha(0.5);
            debugDraw.SetLineThickness(1.0);
            debugDraw.SetFlags(b2DebugDraw.e_shapeBit | b2DebugDraw.e_jointBit);
            world.SetDebugDraw(debugDraw);
            */

     }

      // scale is actually not possible in box2d, so we will be removing old shape and adding new shape
     var b2FixtureDef = Box2D.Dynamics.b2FixtureDef;
     var bubbleFixtureDef = new b2FixtureDef();
     bubbleFixtureDef.density = 0.2;
     bubbleFixtureDef.friction = 0.3;
     bubbleFixtureDef.restitution = 0.6; // adjust this property to reduce or increase bouncing

     var sign = 1;
      //update bubbles
     function update() {
         // change size of China
         var b2CircleShape = Box2D.Collision.Shapes.b2CircleShape;
         var chinaBox2Dimage = chinaImage.box2Dimage;
         var body = chinaBox2Dimage.GetBody();
         // scale is actually not possible in box2d, so we remove old and add new fixture
         body.DestroyFixture(body.GetFixtureList());

         if (chinaImage.width > 160) {
             sign = -1;
         }
         if (chinaImage.width < 70) {
             sign = 1;
         }


         chinaImage.width += sign;

         bubbleFixtureDef.shape = new b2CircleShape(chinaImage.width / 2 / pixels2meters);
         chinaImage.box2Dimage = body.CreateFixture(bubbleFixtureDef);
         chinaImage.displayObject.node.firstChild.setAttribute("r", chinaImage.width / 2 - 1);

         var images = map.dataProvider.images;

         for (var i = 0; i < images.length; i++) {
             var image = images[i];
             var box2Dimage = image.box2Dimage;
             // box2D takes care of positions of bubbles, we simply get those positions and set them on ammap bubbles.
             var bbody = box2Dimage.GetBody();
             var position = bbody.GetPosition();

             var currentX = position.x;
             var currentY = position.y;

             image.displayObject.translate(position.x * 30, position.y * 30, 1, true);
         }


         world.Step(1 / framesPerSecond, 10, 10);

         // uncomment next line if you want to see box2d objects in action (also canvas element at the bottom)
         // world.DrawDebugData();
         world.ClearForces();
     };

     var interval;

     function startInterval() {
         document.getElementById("btn").style.visibility = "hidden";
         interval = window.setInterval(update, 1000 / framesPerSecond);
         setTimeout(stopInterval, 15000);
     }

     function stopInterval() {
         clearInterval(interval);
         document.getElementById("btn").style.visibility = "visible";
     }
              
            
!
999px

Console