20240624 12351300 1.0 TRUE NRS Settlement Boundaries 2020 The National Records of Scotland (NRS), produces 2 datasets biennially which are designed to show the boundaries of urban areas in Scotland: these datasets are Settlements and Localities. While settlements can go a long way in defining the towns and cities in Scotland, some are very extensive and group together some very large populations.A settlement is defined to be a group of high density postcodes whose combined population rounds to 500 people or more. They are separated by low density postcodes.