goog.require('ol.Map');
goog.require('ol.View');
goog.require('ol.format.GPX');
goog.require('ol.layer.Tile');
goog.require('ol.layer.Vector');
goog.require('ol.proj');
goog.require('ol.source.BingMaps');
goog.require('ol.source.GPX');
goog.require('ol.style.Circle');
goog.require('ol.style.Fill');
goog.require('ol.style.Stroke');
goog.require('ol.style.Style');