The NHthes is a thesaurus on natural hazards that contains more than 2000 concepts, over 4000 relationships, and 40 synonyms. The primary sources from which the terms were derived are:
• DPC Glossary. The glossary of the Italian Civil Protection Department. http://goo.gl/vAMlw
• Australian Emergency Management (EMA) Glossary
• United Nations Office for Disaster Risk Reduction (UNDRR) Glossary
• Intergovernmental Panel on Climate Change (IPCC) Glossary
• World Association for Disaster and Emergency Medicine (WADEM) Glossary
• EARTh Thesaurus (CNR-IIA)
• Thesaurus GEMET
• Crisis Management Vocabulary (MOAC)
• SWEET NASA Ontology: Semantic Web Earth and Environmental Terminology.
The thesaurus is in Italian, the English version is under development.