WMO Hydrological Observing System (WHOS) Phase I

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WHOS Phase I provides a map interface displaying information on National Hydrological Services (NHSs) around the world including: 

  1. links to their websites;
  2. when available, links to their historical observations and/or real-time data published online without restrictions or cost. 

This map interface was published online in 2015 and is updated on a regular basis. 

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