Output Area (2011) to Postcode Sector (December 2011) Best Fit Lookup in EW

<span style='color: rgb(51, 51, 51); font-family: &quot;Avenir Next W01&quot;, &quot;Avenir Next W00&quot;, &quot;Avenir Next&quot;, Avenir, &quot;Helvetica Neue&quot;, Helvetica, Arial, sans-serif; font-size: 17px;'>A best-fit lookup between output areas and enumeration postcode sectors as at 31 December 2011 in England and Wales. The 2011 OA to enumeration postcode sector (E&amp;W) lookup has been created from a base file, namely the residential postcode (census enumeration only) to 2011 OA lookup. The base file was created by best-fitting postcodes to 2011 OA by plotting the postcode centroid (the point of the mean address in the postcode) into the 2011 OA. To create a 2011 OA to postcode sector lookup from the base file, the following processes were run: - postcodes were truncated to five characters (postcode sector level) from seven characters (unit postcode level). - these five character postcode sectors were grouped to form a postcode sector to OA lookup (many postcode sectors to many OA). - each unique OA was then assigned to a single postcode sector. If an OA covered more than one postcode sector, the postcode sector with most Census population falling in the OA was assigned. This gives a one OA to many postcode sectors lookup. Postcode sectors can cross administrative areas and will only be aligned within the defined postcode hierarchy. (File Size 3MB).</span><div><p style='margin-bottom:0cm;margin-bottom:.0001pt;line-height: normal'><span style='font-size: 11.5pt; font-family: Helvetica, sans-serif;'>Field Names – OA11CD, PCDS11CD</span></p> <p style='margin-bottom:0cm;margin-bottom:.0001pt;line-height: normal'><span style='font-size: 11.5pt; font-family: Helvetica, sans-serif;'>Field Types – Text, Text</span></p> <p style='margin-bottom:0cm;margin-bottom:.0001pt;line-height: normal'><span style='font-size: 11.5pt; font-family: Helvetica, sans-serif;'>Field Lengths – 9, 5</span></p></div><div><br /></div><div><div></div></div><div><br /></div><div><div>REST URL of Feature Access Service – <a href='https://services1.arcgis.com/ESMARspQHYMw9BZ9/arcgis/rest/services/OA11_PCDS11_EW_LU_1e64375a018c47b1b8f0932c5c27d4f2/FeatureServer' target='_blank' rel='nofollow ugc noopener noreferrer'>https://services1.arcgis.com/ESMARspQHYMw9BZ9/arcgis/rest/services/OA11_PCDS11_EW_LU_1e64375a018c47b1b8f0932c5c27d4f2/FeatureServer</a></div></div>本数据集为英格兰及威尔士地区2011年12月31日时点下，输出区（Output Area, OA）与普查邮政编码扇区之间的最优匹配对照表。本次发布的2011年输出区至普查邮政编码扇区（英格兰及威尔士）对照表，基于基础文件生成，该基础文件为仅用于普查的住宅邮政编码至2011年输出区对照表。该基础文件通过以下方式生成：将邮政编码质心（即邮政编码内所有地址的平均坐标点）匹配至2011年输出区，以此实现邮政编码与2011年输出区的最优匹配。为基于该基础文件生成2011年输出区至邮政编码扇区对照表，执行了如下处理流程： 1. 将七位字符的单位邮政编码截断为五位字符，对应邮政编码扇区层级； 2. 将五位字符的邮政编码扇区进行分组，生成邮政编码扇区至输出区的对照表（多对多映射关系）； 3. 为每个唯一的输出区分配单个邮政编码扇区：若某一输出区覆盖多个邮政编码扇区，则选取该输出区内普查人口最多的邮政编码扇区作为匹配对象，最终形成输出区至多个邮政编码扇区的一对多映射对照表。 邮政编码扇区可跨行政区域划分，仅在既定邮政编码层级体系内保持对齐。本数据集文件大小为3MB。 字段名称：OA11CD、PCDS11CD 字段类型：文本型、文本型 字段长度：9位、5位 REST 要素访问服务地址：https://services1.arcgis.com/ESMARspQHYMw9BZ9/arcgis/rest/services/OA11_PCDS11_EW_LU_1e64375a018c47b1b8f0932c5c27d4f2/FeatureServer