Until 1949, all administrative districts of Prague were formed by the whole one or more cadastral unit, municipality or town. Since 1949, there has been a fundamental change in the administrative division. Since then, the boundaries of many urban districts, administrative districts and city districts are independent of the boundaries of cadastral territories and some cadastral territories are thus divided into administrative and self-governing parts of the city. Cadastral area (for example, Vinohrady, Smíchov) are still relevant especially for the registration of land and real estate and house numbering.