Editing Coastal erosion extent (section)

== Aggregation Semantics ==
Geographic aggregation of coastal erosion extent involves integrating spatial measurements across defined coastal segments or regions to assess cumulative erosion impacts. Temporal aggregation may include averaging or summing erosion extents over specified time intervals, such as seasonal, annual, or multi-year periods, to capture trends and episodic events. Cross-signal aggregation considers relationships with related environmental signals such as coastal storm surge height, global mean sea level, and sediment transport flux to contextualize erosion dynamics within broader coastal system changes. Aggregation semantics support multi-scale analysis and synthesis of coastal erosion data for environmental assessment.