The limit of SWAMP/MARSH is the extent of the wet, spongy area.
If SWAMP/MARSH is ≥ 0.1" along the shortest axis,then capture.
Source Interpretation Guidelines
Break SWAMP/MARSH for RAILWAYS and for Class 1 and Class 2 ROADS.
Break SWAMP/MARSH for clearings that are ≥ 0.05" along the shortest axis, or for
linear clearings that are ≥ 0.025" along the shortest axis.
Do not capture mangrove areas as SWAMP/MARSH, see TREES (Vegetative
Surface Cover theme).
SWAMP/MARSH may be coincident with AREA OF COMPLEX CHANNELS, ESTUARY, LAKE/POND, SEA/OCEAN, STREAM/RIVER. An alternate approach is to use hydrographic category to describe the water regime of the SWAMP/MARSH.
Capture as SWAMP/MARSH any areas filled with the marsh and swamp symbol.
Revision - General
Revision - Standard
Revision - Limited
Do not revise. Retain existing features.
About Feature Templates