OA (2011) to OA (2021) to Local Authority District (2022) Exact Fit Lookup in EW (V2)
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<span style='box-sizing:border-box; max-width:100%; color:rgb(0, 0, 0); font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:17px;'>This is an exact-fit lookup file between Output Areas as at December 2011 and Output Areas as at December 2021 and Local Authority Districts as at December 2022 in England and Wales. This product has been provided with a 'change indicator' field, that define the lookup between 2011 and 2021 OA. This field indicates which output areas / super output areas have changed between 2011 and 2021. </span><div><font color='#000000' face='Avenir Next W01, Avenir Next W00, Avenir Next, Avenir, Helvetica Neue, sans-serif'><span style='font-size:17px;'><br /></span></font></div><div><font color='#000000' face='Avenir Next W01, Avenir Next W00, Avenir Next, Avenir, Helvetica Neue, sans-serif'><span style='font-size:17px;'>This is a version 2 of the file as there has been 9 changes in the Change Indicator field from splits to complex<br /></span></font><div><span style='box-sizing:border-box; max-width:100%; color:rgb(0, 0, 0); font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:17px;'><br /></span></div><div><span style='box-sizing:border-box; max-width:100%; color:rgb(0, 0, 0); font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:17px;'>There are four designated categories to describe the changes, and these are as follows:</span></div><div><span style='box-sizing:border-box; max-width:100%; color:rgb(0, 0, 0); font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:17px;'><br /></span></div><div><span style='box-sizing:border-box; max-width:100%; color:rgb(0, 0, 0); font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:17px;'>U - No Change from 2011 to 2021. This means that direct comparisons can be made between these 2011 and 2021 OA. </span></div><div><span style='box-sizing:border-box; max-width:100%; color:rgb(0, 0, 0); font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:17px;'>S - Split. This means that the 2011 OA has been split into two or more 2021 OA. There will be one record for each of the 2021 OA that the 2011 OA has been split into. This means direct comparisons can be made between estimates for the single 2011 OA and the estimates from the aggregated 2021 OA.</span></div><div><span style='box-sizing:border-box; max-width:100%; color:rgb(0, 0, 0); font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:17px;'>M - Merged. 2011 OA have been merged with another one or more 2011 OA to form a single 2021 OA. This means direct comparisons can be made between the aggregated 2011 OAs’ estimates and the single 2021 OA’s estimates.</span></div><div><span style='box-sizing:border-box; max-width:100%; color:rgb(0, 0, 0); font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:17px;'>X - The relationship between 2011 and 2021 OA is irregular and fragmented. This has occurred where 2011 OA have been redesigned because of local authority district boundary changes, or to improve their social homogeneity. These can’t be easily mapped to equivalent 2021 OA like the regular splits (S) and merges (M), and therefore like for like comparisons of estimates for 2011 OA and 2021 OA are not possible. </span></div><div><span style='box-sizing:border-box; max-width:100%; color:rgb(0, 0, 0); font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:17px;'><br /></span></div><div><span style='box-sizing:border-box; max-width:100%; color:rgb(0, 0, 0); font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:17px;'>Field Names – OA11CD, CHNGIND, OA21CD, LAD22CD, LAD22NM, LAD22NMW </span></div><div><span style='box-sizing:border-box; max-width:100%; color:rgb(0, 0, 0); font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:17px;'>Field Types – Text, Text, Text, Text, Text, Text</span></div><div><span style='color:rgb(0, 0, 0); font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:17px;'>Field Lengths – 9, 1, 9, 9, 35, 24</span></div></div>
本数据集为英格兰与威尔士地区2011年12月版输出区域（Output Areas）、2021年12月版输出区域，以及2022年12月版地方当局辖区（Local Authority Districts）之间的精准匹配查找文件。本数据集附带「变更标识（change indicator）」字段，用于界定2011版与2021版输出区域的匹配关系，该字段可标识2011至2021年间发生变更的输出区域/超级输出区域（Super Output Areas）。 本文件为第二版，因「变更标识」字段中存在9处由拆分向复杂变更类型的调整。 本次变更共划分为四类标准场景，具体如下： U：2011版至2021版无变更。此类场景下，可直接对2011版与2021版输出区域进行比对分析。 S：拆分。即1个2011版输出区域被拆分为2个及以上2021版输出区域，针对拆分出的每个2021版输出区域均存在一条对应记录。此类场景下，可将单个2011版输出区域的统计值与拆分后多个2021版输出区域的汇总统计值直接比对。 M：合并。即1个2011版输出区域与其他1个或多个2011版输出区域合并为1个2021版输出区域。此类场景下，可将合并前多个2011版输出区域的汇总统计值与单个2021版输出区域的统计值直接比对。 X：关系不规则且碎片化。该场景因地方当局辖区边界调整或为提升区域社会同质性而对2011版输出区域进行重新规划所致，无法像常规拆分（S）与合并（M）场景那样实现一一映射匹配，因此无法直接对2011版与2021版输出区域的统计值进行同类比对。 字段名称依次为：OA11CD、CHNGIND、OA21CD、LAD22CD、LAD22NM、LAD22NMW 字段类型均为文本型（Text） 字段长度分别为：9、1、9、9、35、24
