Counties — OSi National Statutory Boundaries — 2019 — Generalised 20 m

<div style=‘text-align:Left;font-size:12pt’>The division into counties based on the model used in the English system, was introduced gradually by English settlers from the late 12nd century onwards. These land Divisions were formed following the Norman invasion of Ireland in Imitation of the counties then in use as units of local government in the Kingdom of England. The older term “shire” was historically equivalent to “county”. The principal function of the county was to impose royal control in the areas of taxation, security and the administration of justice at local level. Following a survey under the 1825 Boundary Survey Act, an extensive series of maps of Ireland was created by the Irish division of the Ordnance Survey for taxation purposes. These maps both documented and standardised the boundaries of the thirty two counties of Ireland.County boundary Dataset generated from the 2019 OSi National Statutory Boundary Dataset. Generalised to 20 metres.Coordinate Reference System: Irish transverse Mercator.</div>自12世纪末起，英格兰殖民者逐步引入了以英格兰体系为模板的郡（county）级区划。此类土地划分单元于诺曼征服爱尔兰后设立，效仿了彼时英格兰王国所采用的地方治理单位——郡制。旧时术语“shire”在历史上与“county”（郡）同义。郡的核心职能在于在地方层面推行税收、治安与司法行政领域的王室管控。根据1825年《边界测绘法案》开展的测绘工作，爱尔兰陆军测量局（Ordnance Survey爱尔兰分部）为税务目的制作了一系列覆盖全爱尔兰的详尽地图。这些地图既记录了爱尔兰32个郡的边界，也统一了其边界标准。本郡界（County boundary）数据集源自2019年爱尔兰陆军测量局（OSi）国家法定边界数据集，已概化至20米精度，坐标参考系（Coordinate Reference System）采用爱尔兰横轴墨卡托投影（Irish transverse Mercator）。