Using Secondary Data to Measure, Monitor and Visualise Spatio-Temporal Uncertainties in Geodemographics

地理人口分类是对小地理区域的建筑、社会和经济特征的分类汇总措施。商业和非商业部门提供了许多地理人口分类;然而，最广泛使用的非商业地理人口是国家统计局（ONS）的输出地区分类（OAC），它完全是根据2001年人口普查数据构建的。这一分类对主要来自公共部门的用户群体产生了巨大影响（www.areaclassification.org）。2001年OAC的成功和不断增长的用户基础导致ONS支持使用2011年人口普查数据构建新的分类一旦发布。对完全根据人口普查数据构建的分类的常见批评是，由于每次人口普查后几年内无法获得整理的数据，因此它们不够现代，而且，随着时间的推移，这些数据可能越来越不能代表当前的人口和小区域内的建筑结构。2001年审计和咨询办公室的方法没有任何机制可以用来随着时间的推移对这些错误进行评估，也没有任何机制可以用来审查分类，并可能利用最新数据进行更新。因此，在2001年OAC的历史背景下，该项目将整合二手数据，以实施一种随着时间的推移筛选小面积住宅结构的方法，并创建可以传达给政策执行者受众的不确定性的时间措施，此外，还可用于提供2001年OAC的更新。这项工作将确立一种方法，然后可用于2011年海洋观测中心的建设。

Geodemographic classifications are categorical summary measures of the built, social and economic characteristics of small geographical areas. There are many geodemographic classifications supplied by both the commercial and non-commercial sectors; however, the most widely used non-commercial geodemographic is the Office for National Statistics (ONS) Output Area Classification (OAC) which was constructed entirely from the 2001 Census data. This classification has generated great impact with a user community drawn principally from across the public sector (www.areaclassification.org). The success and growing user base of 2001 OAC has led to the ONS supporting the construction of a new classification utilising the 2011 Census data once released.A common criticism levied at classifications which are built entirely from Census data is that they are insufficiently contemporary given that collated data are not available for some years after each Census, and, that over time, these data may become increasingly unrepresentative of current population and built structures within small areas. The 2001 OAC methodology contained no mechanism through which these errors could be assessed over time, or for the classification to be reviewed and possibly updated utilising more recent data. As such, within the historical context of the 2001 OAC, this project will integrate secondary data to implement a methodology of screening of small area residential structures over time, and create temporal measures of uncertainty that can be both communicated to policy-practitioner audiences, and furthermore, be utilised to provide updates to the 2001 OAC. This work will establish a methodology which can then be used prospectively in the construction of the 2011 OAC.