Settlements Generalised 100 m — OSi National Statistical Boundaries — 2015

<div style=‘text-align:Left;font-size:12pt’>In order to distinguish between the urban and rural population for census analysis, the boundaries of distinct Settlements need to be defined. This requires the creation of suburbs and extensions to existing cities and legal towns, as well as delineating boundaries for Settlements which are not legally defined (called Census towns). From 1971 to 2006, Census towns were defined as a cluster of fifty or more occupied dwellings where, within a radius of 800 metres there was a nucleus of thirty occupied dwellings (on both sides of a road, or twenty on one side of a road), along with a clearly defined urban centre e.g. a shop, a school, a place of worship or a community centre. Census town boundaries where extended over time where there was an occupied Dwelling within 200 metres of the existing boundary. To avoid the agglomeration of adjacent towns caused by the inclusion of low density one off dwellings on the approach routes to towns, the 2011 criteria were tightened, in line with UN criteria. In Census 2011 a new Census town was defined as being a cluster with a minimum of 50 occupied dwellings, with a maximum distance between any Dwelling and the building closest to it of 100 metres, and where there was evidence of an urban centre (shop, school etc). The proximity criteria for extending existing 2006 Census town boundaries were also amended to include all occupied dwellings within 100 metres of an existing building. Other information based on OSi mapping and orthogonal photography was taken into account when extending boundaries. Oundary extensions were Generally made to include the land parcel on which a Dwelling was built or using other physical features such as roads, paths etc. Extensions to the Environs and suburbs of legal towns and cities were also constructed using the 100 Metre proximity rule applied to Census towns. For census reports, urban Settlements are towns with a population of 1,500 or more, while Settlements with a population of less than 1,500 are classified as rural.</div>为开展人口普查分析中的城乡人口区分工作，需明确各类聚居点（Settlements）的边界范围。这要求对现有城市及法定城镇的郊区与延伸区域进行划定，并为未被法定界定的聚居点（称为普查城镇（Census towns））绘制边界。1971年至2006年间，普查城镇的界定标准为：拥有至少50处已入住住宅的集群，且在800米半径范围内存在由30处已入住住宅构成的核心区域（分布于道路两侧，或单侧道路沿线分布20处），同时需配有明确的城镇中心，例如商铺、学校、宗教场所或社区中心。随着时间推移，若现有普查城镇边界200米范围内存在已入住住宅，则可对其边界进行延伸。为避免因纳入城镇进出道路沿线的低密度独立住宅，导致相邻城镇连片聚集，2011年的界定标准参照联合国（UN）准则进行了收紧。2011年人口普查中，新普查城镇的界定标准调整为：拥有至少50处已入住住宅，任意住宅与其最近建筑的最大间距不超过100米，且需具备城镇中心相关特征（如商铺、学校等）。同时，针对2006年普查城镇边界的延伸邻近判定标准也进行了修订，将现有建筑100米范围内的所有已入住住宅纳入考量范围。在延伸边界时，需综合参考OSi地图与正交摄影（orthogonal photography）数据。边界延伸通常以包含住宅所在地块为原则，或依托道路、步道等实体地理特征进行划定。针对法定城镇及城市的周边区域（Environs）与郊区的延伸，同样采用适用于普查城镇的100米邻近规则进行划定。在人口普查报告中，人口规模达1500人及以上的聚居点被归类为城镇聚居点，而人口不足1500人的聚居点则被划分为农村聚居点。