Lexicon

NAVIGATION | Acronyms | Terms | Definitions |

The NSDI Lexicon is a structured glossary of terms, definitions, and concepts that underpin the National Spatial Data Infrastructure (NSDI). Maintained by the Federal Geographic Data Committee (FGDC), it provides standardized language for geospatial data management, governance, and technology. The lexicon includes terminology related to data themes, metadata standards, interoperability protocols, and policy frameworks such as the Geospatial Data Act (GDA) and OMB Circular A‑16. Its purpose is to ensure consistency and clarity across federal, state, local, tribal, academic, nonprofit, and private-sector stakeholders, reducing ambiguity in technical and policy discussions. By serving as a common reference point, the NSDI Lexicon supports effective communication, compliance with standards, and alignment of geospatial initiatives within the broader NSDI ecosystem.