+ latitude: <%= 8*SCALE %>
+ longitude: <%= -180.01*SCALE %>
+ changeset_id: 5
+ visible: true
+ version: 1
+ tile: <%= QuadTile.tile_for_point(8,-180.01) %>
+ timestamp: 2007-01-01 00:00:00
+
+node_west_limit:
+ id: 13
+ latitude: <%= 13*SCALE %>
+ longitude: <%= -180*SCALE %>
+ changeset_id: 5
+ visible: true
+ version: 1
+ tile: <%= QuadTile.tile_for_point(13,-180) %>
+ timestamp: 2008-07-08 15:17:37