text: There's a fair bit of duplication going on here.  
  Three different things are named as "Woolwich Ferry South Pier" - the pier itself, a closed way at the end of the pier which is also "amenity=ferry_terminal", and a node at the end of that which is also "amenity=ferry_terminal".  Looking at the use of "amenity=ferry_terminal", it seems to be used worldwide as nodes, as buildings, and as larger areas including buildings.
  