D3 Examples - Test of income and sea level

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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="initial-scale=1.0, user-scalable=no"/>
<title>Vis Project - Sea Level Rise</title>
​
<style>
      html, body {
        height: 100%;
        margin: 0;
        padding: 0;
      }
      #map {
        height: 100%;
      }
</style>
</head>
<body>
<p>
<h1> Sea Level Rise</h1>
Projected Sea Level:  
<select id="seaLevels" onchange="handleSeaLevel()">
  <option value="0m">0m</option>
  <option value="1m">1m</option>
  <option value="2m">2m</option>
  <option value="3m">3m</option>
  <option value="4m">4m</option>
  <option value="5m">5m</option>
  <option value="6m">6m</option>
</select>
<p>
<div id="map"></div>
<script src="//maps.google.com/maps/api/js?sensor=true"></script>
<script src="//d3js.org/d3.v3.min.js"></script>
<script>
​
// Create the Google Map
var map = new google.maps.Map(d3.select("#map").node(), {
  zoom: 8,
  center: new google.maps.LatLng(37.76487, -76.41948),
  mapTypeId: google.maps.MapTypeId.TERRAIN
});
​
overlay = new google.maps.KmlLayer({   
  url: 'https://jamestiberiuseanes.github.io/IncomeMap4.kml',
  map:  map
});
​
function handleSeaLevel()  {
  var x = document.getElementById("seaLevels").value;
  var layer = "https://jamestiberiuseanes.github.io/SeaLevelMap" + x + "-1.kml";
  overlay.setMap(null);
  overlay = new google.maps.KmlLayer({   
    url: 'https://jamestiberiuseanes.github.io/IncomeMap4.kml',
    map:  map
  });
  overlay = new google.maps.KmlLayer({   
    url: layer,
    map:  map
  });
}
​
</script>
​
​
    