http://inspire.ec.europa.eu/codelist/NaturalObjectTypeValueINSPIRE Registry teamJRC-INSPIRE-SUPPORT@ec.europa.euhttp://inspire.ec.europa.eu/registry2015-08-18 17:18 PM CEST2015-08-18 17:18 PM CESTNatural Object TypeTypes of natural hydrogeological objects.http://inspire.ec.europa.eu/codelist/NaturalObjectTypeValue/spring2015-08-18 17:32 PM CEST2015-08-18 17:32 PM CESTspringAny natural situation where groundwater flows to the surface of the earth. Thus, a spring is a site where the aquifer surface meets the ground surface.http://inspire.ec.europa.eu/codelist/NaturalObjectTypeValue/seep2015-08-18 17:32 PM CEST2015-08-18 17:32 PM CESTseepA moist or wet place where groundwater reaches the earth's surface from an underground aquifer.http://inspire.ec.europa.eu/codelist/NaturalObjectTypeValue/swallowHole2015-08-18 17:32 PM CEST2015-08-18 17:32 PM CESTswallow holeA natural depression or hole in the Earth's surface, also known as a sink, shake hole, sinkhole, swallow hole, swallet, doline or cenote, it is mostly caused by karst processes - the chemical dissolution of carbonate rocks or suffusion processes for example in sandstone.http://inspire.ec.europa.eu/codelist/NaturalObjectTypeValue/fen2015-08-18 17:32 PM CEST2015-08-18 17:32 PM CESTfenLow land that is covered wholly or partly with water and that usually has peaty alkaline soil and characteristic flora (as of sedges and reeds).http://inspire.ec.europa.eu/codelist/NaturalObjectTypeValue/notSpecified2015-08-18 17:32 PM CEST2015-08-18 17:32 PM CESTnot specifiedUnspecified places where groundwater meets the surface.http://inspire.ec.europa.eu/codelist/NaturalObjectTypeValue/other2015-08-18 18:07 PM CEST2015-08-18 18:07 PM CESTotherOther places where groundwater table meets the surface.