These polygons represent inland water bodies that are sufficiently wide enough to be captured as an area.
Schema
The schema of the feature type describes the "returnables" and "receivables". "Returnables" are feature properties that are returned in responses to a query. "Receivables" are feature properties are feature properties that have to or can be provided by the client in mutation operations (create, replace, or update). Unless otherwise specified, a property is both a returnable and a receivable.