Chatham Islands Imported: 6/5 Glen
OSM Page: http://wiki.openstreetmap.org/wiki/Tag:barrier%3Dgate
see methods comments in the cattlstp_pnt layer; barriers want to
be tagged nodes on road ways.
HB: for the ones I've looked at, gate nodes exactly match road_cl nodes when the gates fall on a road. Sometimes the gates are not on the road, need to check if they fit into the fence_cl layer.
RP: yes, this looks good. if the gate is on a road, and in a fence, the two ways should meet and the gate be at the common node. see the gates in auckland university city campus for an example
HB 27 Aug 2012: updated to shorter field name for restrictions. (only value there is "locked")