Rendering Heatmaps in GMaps

gistfile1.txt

var brazil = new google.maps.LatLng(-18.771115, -42.758789);

map = new google.maps.Map(document.getElementById('map-canvas'), {
  center: brazil,
  zoom: 5,
  mapTypeId: google.maps.MapTypeId.ROADMAP
});

layer = new google.maps.FusionTablesLayer({
  query: {
    select: 'LATITUDE',
    from: '0ILwUgu7vj0VSZnVzaW9udGFibGVzOjEzNjcwNQ'
  },
  heatmap: {
    enabled: true
  }
});
layer.setMap(map);