On 09/11/2018 14:44, SK53 wrote:
The available sets of open data which can be used to resolve postcodes are: Food Hygiene (the best, easiest to resolve, coverage of the whole UK - even Rutland); Companies House Open Data (surprisingly useful even in areas of social housing); the National Register of Social Housing (NROSH, not updated since 2011, but still very useful); CQC (medical practices, care homes etc). I haven't looked to see how many postcodes are covered by these in total, but it should be a reasonable proportion of the total. If you aren't aware Will Phillips OSM-Nottingham site does allow searching of various open data sets across the UK (I would recommend searching only in the viewport, so you need to zoom out and in to the target area). The quickest way to ensure at least one address is mapped for a given postcode is using Greg's FHRS tools.
The datasets used by OSM Nottingham currently include 1,278,680 unique postcodes. I've not checked how many of these are valid postcodes. Sources such as Companies House don't validate their addresses, so this total will certainly include some proportion that are incorrect.
There are 1.76 million postcodes in the UK (from Codepoint), so the open data covers at most 73% of the total.
Regards, Will _______________________________________________ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-gb
