title: Alternative to clip for Features and Feature Collection in Google Earth Engine
body: <p>I am very new to Google Earth Engine and I want to be able to perform a feature overlay analysis like shown in this ArcGIS document: <a href="http://resources.esri.com/help/9.3/arcgisdesktop/com/gp_toolref/geoprocessing/overlay_analysis.htm" rel="nofollow noreferrer">http://resources.esri.com/help/9.3/arcgisdesktop/com/gp_toolref/geoprocessing/overlay_analysis.htm</a></p>
  
  <p>I can't seem to find a method to help me do this in GEE. I have two FeatureCollections. Both are collections of around 50 polygons, one of study sites and one of regions and I want to find out where the sites overlap the regions and if they overlap, what proportion of the site is in each region it overlaps. 
  I have tried to use "intersection" but this only shows me the area of the intersection between sites and regions. There is a "clip" method that would be useful to clip the sites to the regions they are in but this appears to only be available to images not feature collections.
  Do you have any suggestions of how I might do this?</p>
  
  <p>Thanks</p>