Administrative division is a part of a country or a defined region. The main objective of the administrative division is for administration purposes. The administrative divisions have been divided into a certain order. In general, the largest administrative subdivision of a country is named as First-Order Administrative Division followed by the smaller administrative subdivision of a country which is named as Second-Order Administrative Division. The number of orders of administrative divisions may be further divided into Third-Order and the smaller Fourth-Order Administrative Division.
What are the differences between First-Order Administrative Division and Second-Order Administrative Division? A country may be divided into several parts like regions or states or provinces, then further divided into municipalities or counties. The highest administrative division is called “First-Order” or “First-Level” Administrative Division, whereas the subdivision is called “Second-Order” or “Second-Level” Administrative Division.
In GeoDataSource, there are only two levels of administrative divisions supported, which are the First-Order Administrative Division and the Second-Order Administrative Division. The First-Order Administrative Divisions are the regions or states of a country. Thus, the “First-Order Administrative Division’s Full Name” is the full name of a complete region name that used to identify the First-Order Administrative Division. The name of the First-Order Administrative Division of GeoDataSource is in compliance with the International Standards Organization ISO3166-2 standard with several exceptions that are listed below.
- 49 countries do not have the official ISO3166-2 subdivisions defined.
- 1 exception for Bahamas – New Providence region, which does not have ISO3166-2 associated.
- 1 exception for Singapore – we categorize Singapore as a single subdivision.
|Anguilla||Antarctica||American Samoa||Aruba||Aland Islands|
|Saint Barthelemy||Bermuda||Bahamas||Bouvet Island||Cocos (Keeling) Islands|
|Cook Islands||Curacao||Christmas Island||Western Sahara||Falkland Islands (Malvinas)|
|Faroe Islands||French Guiana||Guernsey||Gibraltar||Guadeloupe|
|Heard Island and Mcdonald Islands||South Georgia and The South Sandwich Islands||Guam||Hong Kong||Isle of Man|
|British Indian Ocean Territory||Jersey||Cayman Islands||Saint Martin (French Part)||Macao|
|Northern Mariana Islands||Martinique||Montserrat||New Caledonia||Norfolk Island|
|Niue||French Polynesia||Saint Pierre and Miquelon||Pitcairn||Puerto Rico|
|Reunion||Singapore||Svalbard and Jan Mayen||Sint Maarten (Dutch Part)||Turks and Caicos Islands|
|French Southern Territories||Tokelau||Holy See||Virgin Islands, British||Virgin Islands, U.S.,|
For the Second-Order Administrative Division, this is only applicable to the United States (US). For instance, Hill County, Pender County etc. are some examples of Second-Order Administrative Division’s full name that are supported in GeoDataSource for the United States.