Geographic Abbreviations and Acronyms
- HTSHuman terrain systems
- HUAHydrologic Unit Area
- HUCHydrologic Unit Code
- HUDDepartment of Housing and Urban Development (U.S.)
- HUNDHundred
- HVCHue-Value-Chroma
- HWHochwasser
- HWHardware
- IAInfrastructure Analyst
- IAAOInternational Association of Assessing Officers
- IAARInstitute of Arctic and Alpine Research
- IADOInstituto Argentino De Oceanografia
- IAEAInternational Atomic Energy Agency
- IAEGInternational Association of Engineering Geologists
- IAEGSInstitute for Advanced Education In Geospatial Sciences
- IAGInternational Association of Geodesy (IUGG)
- IAGSInter-American Geodetic Survey
- IAHInternational Association of Hydrogeologists (IUGS)
- IAHSInternational Association of Hydrological Sciences
- IAHWGIntergovernmental Ad Hoc Working Group
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