40yr Erosion Visualization

This layer was created by the Cape Cod Commission GIS team to depict depth from erosion and accretion over 40 years. The layer was built from the Mean High Water shoreline that the CCC built for the Cape Cod Coastal Planner (www.capecodcoast.org). This layer displays long-term shoreline accretion and erosion rates based on a forty-year estimate of sediment transport, generated from the Long-Term Rate of erosion from the MA Shoreline Change Project. More information is available here: https://www.mass.gov/service-details/massachusetts-shoreline-change-project. Each individual erosion transect was intersected with the shoreline layer and its long term rate was applied to the shoreline. Segments without a transect were extrapolated based on the closest sediment transport trend. Each shoreline segment was then buffered to the length coded on the line. Accretion rates were buffered seaward and Erosion rates were buffered landward.