goog.require('ol.Feature');
goog.require('ol.Map');
goog.require('ol.Observable');
goog.require('ol.View');
goog.require('ol.control');
goog.require('ol.easing');
goog.require('ol.geom.Point');
goog.require('ol.layer.Tile');
goog.require('ol.layer.Vector');
goog.require('ol.proj');
goog.require('ol.source.OSM');
goog.require('ol.source.Vector');
goog.require('ol.style.Circle');
goog.require('ol.style.Stroke');