:d3.select(window).on("resize", throttle);

// Allow zooming
var zoom = d3.behavior.zoom()
    // scaleExtent allows zooming from size of image (1) to (9) times magnification
    .scaleExtent([1, 9])
    .on("zoom", move);


var width = document.getElementById('map').offsetWidth;
var height = 400;

var topo,projection,path,svg,g,b,s;

var graticule = d3.geo.graticule();

// Add tooltip to map with two classes: tooltip and hidden
// Updates in draw function
var tooltip = d3.select("#map").append("div").attr("class", "tooltip hidden");

setup(width,height);

function setup(width,height){
  // Create mercator-style map and center it on the page
  projection = d3.geo.equirectangular()
    .translate([(width/2), (height/1.5)])
    .scale( width / 3.4 / Math.PI);

  path = d3.geo.path().projection(projection);

  svg = d3.select("#map").append("svg")
      .attr("width", width)
      .attr("height", height)
      .call(zoom)
      .on("click", click)
      .append("g");


  g = svg.append("g");

}