function createMap(divName) {
  // Create a map
  var map = L.map(divName);

  // Create a layer switcher
  var layers = L.control.layers();

  // Add OpenStreetMap layer
  layers.addBaseLayer(L.tileLayer("http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png", {
    attribution: "© <a target=\"_parent\" href=\"http://www.openstreetmap.org\">OpenStreetMap</a> and contributors, under an <a target=\"_parent\" href=\"http://www.openstreetmap.org/copyright\">open license</a>",
    maxZoom: 19
  }), "OpenStreetMap");

  <% @layers.sort_by { |layer| layer[:name] }.each do |layer| -%>
  // Add <%= layer[:name].to_json %> layer
  layers.addBaseLayer(L.tileLayer(<%= layer[:url].to_json %>, {
    attribution: <%= layer[:attribution].to_json %>,
    maxZoom: <%= layer[:maxZoom].to_json %>
  }), <%= layer[:name].to_json %>);

  <% end -%>
  <% @overlays.sort_by { |layer| layer[:name] }.each do |layer| -%>
  // Add <%= layer[:name].to_json %> layer
  layers.addOverlay(L.tileLayer(<%= layer[:url].to_json %>, {
    attribution: <%= layer[:attribution].to_json %>,
    maxZoom: <%= layer[:maxZoom].to_json %>
  }), <%= layer[:name].to_json %>);

  <% end -%>
  // Add the layer switch to the mao
  layers.addTo(map);

  // Zoom to specified bounds
  map.fitBounds(<%= @bbox.to_json %>);

  return map;
}