The limit of WALL is the edge of the structure.
If WALL is a seawall,
If WALL is associated with a 2-dimensional LOCK CHAMBER and WALL has water
on both sides,
If WALL extends into a body of water and is not a pier/breakwater/jetty or seawall,
Source Interpretation Guidelines
If WALL is not associated with a hydrographic feature,
Then capture in the Built-Up theme.
If the edge of LOCK CHAMBER separates water from land,
Then do not capture WALL. See NONEARTHEN SHORE or SHORELINE.
If DAM/WEIR, NONEARTHEN SHORE, PIER/BREAKWATER/JETTY,
SHORELINE, or SPILLWAY is captured,
Then do not capture WALL.
If WALL meets capture conditions, and coincides 2-dimensional
CANAL/DITCH, hen capture both WALL and CANAL/DITCH.
Revision – General
Revision - Standard
Revision - Limited
Do not revise. Retain only those WALLS associated with LOCK CHAMBER.
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