gistfile1.js

/**
 * Google Maps API 2.0
 * MapBox integration.
 *
 * Do not remove the MapBox or OpenStreetMap attribution from this code,
 * doing so is in violation of the terms of both licenses.
 */

/**
 * Factory function for a MapBox layer for use with a
 * Google Map
 *
 * @param {string} layername
 *  layername in the TMS schema
 * @param {string} layertitle
 *  layer will be called in the user interface
 * @param {number} minZoom
 *  minimum (farthest out) zoom level, default 0
 * @param {number} maxZoom
 *  maximum (closest) zoom level, default 13
 * @return {GMapType} map
 *  GMapType object 
 */
function GMapBox(layername, layertitle, minZoom, maxZoom) {
  var copyright, copyrightCollection, tilelayers, GMapTypeOptions;
  if(minZoom === undefined) {
    minZoom = 0;
  }
  if(maxZoom === undefined) {
    maxZoom = 13;
  }
  // Copyright info
  copyright = new GCopyright(1,
    new GLatLngBounds(new GLatLng(-90,-180),new GLatLng(90,180) ),
    0, "<a href='http://mapbox.com'><img src='mapbox.png'></a>");
  copyrightCollection = new GCopyrightCollection();
  copyrightCollection.addCopyright(copyright);
  
  tilelayers = [new GTileLayer(copyrightCollection,minZoom,maxZoom)];

  tilelayers[0].getTileUrl = function(a,b){
    // Y coordinate is flipped in Mapbox, compared to Google
    a.y = Math.abs(a.y - (Math.pow(2,b) - 1));
    return "http://a.tile.mapbox.com/1.0.0/" + layername + "/" + b + "/" + a.x + "/" + a.y + ".png";
  }

  // Default options for the new map type.
  GMapTypeOptions = {minResolution: minZoom, maxResolution: maxZoom};

  // Create the custom map type and add it to the map.
  return new GMapType(tilelayers, new GMercatorProjection(maxZoom + 1), tilestitle, GMapTypeOptions);
}

map.addMapType(GMapBox('world-light', 'World Light'));