Editing Coastal erosion extent (section)

== Boundary Conditions ==
Boundary inclusions encompass all measurable retreat or loss of shoreline and coastal landforms caused by physical oceanic and atmospheric forcing, including sea-level rise, storm surge, wave action, and related hydrodynamic processes. The signal includes both gradual erosional processes and episodic events that result in land loss. Boundary exclusions are areas where apparent shoreline changes are due to non-erosional factors such as sediment deposition, anthropogenic land reclamation, or construction unrelated to natural erosional processes. Inland geomorphic changes beyond the immediate coastal zone and subsidence unrelated to oceanic forcing are also excluded.