Ed Avis [mailto:e...@waniasset.com] wrote: >Sent: 15 February 2011 5:40 PM >To: talk-gb@openstreetmap.org >Subject: Re: [Talk-GB] Armchair-mapping postcodes (was: B72 is a wrap) > >Andy Robinson (blackadder-lists <ajrlists@...> writes: > >>><http://www.raggedred.net/codepoint/> >>> >>>I see - so you can use your judgement to work out the area of a >>>postcode based on its centroid and the streets and buildings nearby. >> >> >>It's not that simple. You need to do the ground survey first to get the >>house numbers and work out which property "belongs" to which street. > >Ah, right. I thought it sounded too good to be true! Jerry C. also pointed out >that house numbers have to be present. > >So the ground survey is to add the house numbers - or I suppose just >addr:street would be sufficient in most cases? - and then the armchair part is >putting those together with the code point data to find buildings in a particular >postcode. > >OSM's coverage of streets is much better than its coverage of buildings. >Might it make sense to tag postcodes on ways?
Nope, streets often have more than one postcode for the properties on that street. It's not the street that has a postcode anyway, it's the delivery points for the mail, i.e. the letterbox in your front door. Hence why I only tag the building with the full postcode. Cheers Andy _______________________________________________ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
