from    Hello Tobias Thought youd like to know Ive recently concluded a useful email correspondence with a member of staff at the US National GeospatialIntelligence Agency NGA In short it appears the NGA uses a four to five level system not unlike NUTSLAU Ive transcribed it from the table sent by email into the wikitable below   classwikitable colspan Feature Designation   Code  Name                                  Text   ADM  firstorder administrative division   a primary administrative division of a country such as a state in the United States   ADM  secondorder administrative division  a subdivision of a firstorder administrative division   ADM  thirdorder administrative division   a subdivision of a secondorder administrative division   ADM  fourthorder administrative division  a subdivision of a thirdorder administrative division   ADMD  administrative division               an administrative division of a country undifferentiated as to administrative level   The NGA leaves the definitions Text in the above table of ADMs  intentionally vague All we attempt to identify with the ADM is the hierarchical structure and if there is no hierarchy then the level of importance or size with ADM being the largest  In a table of global country subdivisions would you expect all those entities found in a particular column ie at a particular level to be similar in importance or size  presumably where size might mean area or population  Regards