The map to the right shows Washtenaw County, Michigan.  Ann Arbor/Ypsilanti is the large central burgundy region.  Ypsilanti lies to the east of Ann Arbor.  

The layers in this map include:

  • surface streams (thus, much of Allen's Creek--that portion in a pipe--is not shown)
  • surface lakes
  • minor civil divisions (outlined in red)
  • impervious surface, as indicated in the legend on the map.  The percent impervious is by land use parcel as designated by Southeast Michigan Council on Governments (www.semcog.org).