http://inspire.ec.europa.eu/codelist/BreakLineTypeValue/flatAreaBoundaryINSPIRE Registry teamJRC-INSPIRE-SUPPORT@ec.europa.euhttp://inspire.ec.europa.eu/registry2015-08-18 17:29 PM CEST2015-08-18 17:29 PM CESTflat area boundaryBreak line that delimits an isolated part of the territory where the elevation model has to be constrained at the same elevation value.NOTE The boundary of a flat area shall be closed.\nEXAMPLE Boundary of an inland water body (e.g. lake).