text: $.getJSON('https://www.highcharts.com/samples/data/jsonp.php?filename=us-population-density.json&callback=?', function (data) {
  
      // Make codes uppercase to match the map data
      $.each(data, function () {
          this.code = this.code.toUpperCase();
      });
  
      // Instanciate the map
      Highcharts.mapChart('map', {
  
          chart: {
              borderWidth: 1
          },
  
          title: {
              text: 'US population density (/km²)'
          },
  
          legend: {
              layout: 'horizontal',
              borderWidth: 0,
              backgroundColor: 'rgba(255,255,255,0.85)',
              floating: true,
              verticalAlign: 'top',
              y: 25
          },
  
          mapNavigation: {
              enabled: true
          },
  
          colorAxis: {
              min: 1,
              type: 'logarithmic',
              minColor: '#EEEEFF',
              maxColor: '#000022',
              stops: [
                  [0, '#EFEFFF'],
                  [0.67, '#4444FF'],
                  [1, '#000022']
              ]
          },
  
          series: [{
              animation: {
                  duration: 1000
              },
              data: data,
              mapData: Highcharts.maps['countries/us/us-all'],
              joinBy: ['postal-code', 'code'],
              dataLabels: {
                  enabled: true,
                  color: '#FFFFFF',
                  format: '{point.code}'
              },
              name: 'Population density',
              tooltip: {
                  pointFormat: '{point.code}: {point.value}/km²'
              }
          }]
      });
  });