20230922 16483200 1.0 TRUE Shore Unit Boundaries <1:15,000 Dataset created by Archipelago Marine Research Ltd. A Shore Unit is a section of shore of uniform physical form (e.g. beach) and substrate (e.g. gravel) in the upper and mid-intertidal zone. The shore unit boundaries designate the point of change from one Shore Unit to another. Archipelago Marine Research Ltd, July 2002