UN-GGIM Definition: Surface water bodies (rivers, lakes, reservoirs), marine waters, and groundwater resources.
SPHERE Mapping
The broadest water theme — spans all Hydrosphere subclasses: freshwater surface, marine, and groundwater. See INSPIRE Hydrography and ISO Inland Waters + ISO Oceans.
Primary sphere: Hydrosphere Subsphere(s): hydrosphere_freshwater_surface, hydrosphere_marine, hydrosphere_groundwater
Harvesting Hints
Keywords: water, river, lake, ocean, groundwater, aquifer, hydrography, marine. Search across both hydrological and oceanographic catalogs.