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The NUTS Boundaries data set (Nomenclature des Unites Territoriales Statistiques) shows sub-national administrative areas within the European Community (EC). Every EC member state has different levels of administrative subdivisions, designated as NUTS-I, NUTS-II and NUTS-III. These standard territorial units of each country have been integrated into a single vector data set. Thus, the data set shows sub-national regions down to the NUTS-III level, but at the same time the NUTS-II and NUTS-I levels are present. Not all these levels are represented in every member state. For example, no subdivision exists for Luxembourg, because of its size. In the same way, NUTS levels I and II for Ireland and NUTS level I for Denmark are not defined. The rest of the member states are represented on all levels. At each level, however, the size of NUTS regions varies considerably. This may result in inconsistencies in the analysis or display of geographic data. In order to ensure comparability, another data set is available, which shows a combination of NUTS levels II and III and also includes non-EC European countries ("Administrative Regions/Boundaries of Europe").