Administrative divisions (also administrative units, administrative regions, subnational entities, or constituent states, as well as many similar generic terms) are geographical areas into which a particular independent sovereign state is divided. Such a unit usually has an administrative authority with the power to take administrative or policy decisions for its area. Administrative divisions are often used as polygons in geospatial analysis.
A seat of government is a "building, complex of buildings or the city from which a government exercises its authority". When referring to a city, the seat of government is generally the capital of the state or administrative entity in question, although there are exceptions. Particular terms for the seat of certain territorial subdivisions are administrative centre, county seat (common in the United States), county town (United Kingdom and Ireland), or barrio-pueblo (Puerto Rico), among others; buildings that may function as seats of government include official residences, supreme court buildings, city or town halls, administrative or executive buildings, shire or county halls, legislative buildings, and barangay halls.