Boundaries - OA - Birmingham

This file contains the digital vector boundaries for Output Areas (OAs), in Birmingham for the 2021 Census geography.The boundaries available are: Generalised Clipped (BGC) - Generalised to 20m and clipped to the coastline (Mean High Water mark) and more generalised than the BFE boundaries.Output AreasOutput Areas (OAs) are the lowest level of geographical area for census statistics and were first created following the 2001 Census. Using Census 2021 data, some changes were made to 2011 OAs as a result of population and household changes since 2011. Additionally, around 200 OA boundaries were selectively realigned to ward boundaries.2011 OAs that were still made up of between 40 and 250 households and had a usually resident population between 100 and 625 persons did not change. Otherwise, new 2021 OAs were created by merging or splitting 2011 OAs to make sure they fitted within the population and household thresholds of the unchanged 2011 OAs.There are some exceptions where OAs may have more than 625 people, for example, where there is a large prison.Outputs from Census 2021 are for 2021 OAs and are made up of unchanged 2011 OAs and new 2021 OAs.NoteThe map view is limited to 1,000 datapoints and if unfiltered may not show all points.Contains both Ordnance Survey and ONS Intellectual Property Rights.TopoJSON Shapefile for Power BIOn the Export tab you will find a file under the Alternative exports. This file is in TopoJSON format and is ready for use in compatible visualisation tools such as Power BI or Mapbox.

本文件包含了伯明翰地区2021年人口普查地理范围内的输出区域（OAs）的数字矢量边界。可用的边界类型包括：泛化裁剪（BGC）- 对应于20米泛化并裁剪至海岸线（平均高潮位）的边界，其泛化程度高于BFE边界。输出区域（OAs）是人口统计数据的最低地理区域单位，首次创建于2001年人口普查之后。利用2021年人口普查数据，由于自2011年以来人口和家庭的变动，对2011年的OAs进行了某些调整。此外，约200个OA边界被有选择性地重新调整至区域边界。2011年OAs在家庭数量介于40至250户之间，通常居住人口介于100至625人之间时未发生变化。否则，新的2021年OAs通过合并或分割2011年OAs创建，以确保其符合未变2011年OAs的人口和家庭阈值。存在一些例外情况，例如大型监狱所在的OA可能人口超过625人。2021年人口普查的输出数据针对2021年OAs，由未变的2011年OAs和新创建的2021年OAs组成。请注意，地图视图限制为1,000个数据点，如未进行筛选，可能无法显示所有点。包含奥尔德尼测量局和英国国家统计局的知识产权。TopoJSON Shapefile适用于Power BI。在“导出”标签页下，您可以在“其他导出”中找到一个文件。此文件为TopoJSON格式，适用于Power BI或Mapbox等兼容的可视化工具。