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1 Native geography comparison - I want to look at some 2001 data for 2001 geography, and then compare it to 2011 (geography unspecified) 2 Current geography comparison - I want to look at some 2001 data for 2011 geography and then compare it to 2011 data 3 Historic geography comparison - I want to look at some 2001 data for 2001 geography and compare it with 2011 data cast back to 2001 geography 4 General broad 2001/2011 comparison - I want to look at some 2011 data (geography unspecified), and then compare it to 2001 (geography unspecified) 5 Compare with closest match, metadata centric - I want to chose a 2001 (or 2011) count, then chose from a list of suggested similar 2011 (or 2001) count, see a comparison and see information telling me how valid the comparison is, what changes between Censuses are relevant to this comparison, and how I should include this changes when interpeting the comparison 6 Free-form comparison, metadata centric - I want to pick a specific 2001 count, pick a specific 2011 count, compare them, and look at all of the methodology and metadata becuase I am more interested in the depth and validity of my chosen comparison than the actual value of it. 7 Theme based omparison - I am interested in X theme and/or Y geography for either 2001 or 2011 - show me what data is available and what types of comparable data is available, with some indication of the validity of the comparisons Is 'data' a cell / count, collection of counts, or whole pre-defined standard output tables ?
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Comparing 2001 and 2011 data - Use scenarios
I think in general at sometime or other all of these will be needed.
The only extra I can think of is similar comparisons and metadata for geographic changes. As OA's are not constant, i.e. some will be split or merged (< 5%) information to identify these will be required. Indeed being able to select these, may even be required as they will potentially be the areas of greatest change.