[Talk-GB] Armchair-mapping postcodes (was: B72 is a wrap)

Andy Robinson (blackadder-lists) ajrlists at gmail.com
Tue Feb 15 17:32:25 GMT 2011

Ed Avis [mailto:eda at waniasset.com] wrote:
>Sent: 15 February 2011 5:24 PM
>To: talk-gb at openstreetmap.org
>Subject: [Talk-GB] Armchair-mapping postcodes (was: B72 is a wrap)
>Andy Robinson (blackadder-lists <ajrlists at ...> writes:
>>>Great work!  How can you tell when you have every postcode and is
>>some way of checking them against the OS OpenData postcode centroids?
>>Just by being systematic. If you have Chillly's codepoint postcode
>>layer sitting over BING its easy in the editor to assign the postcodes
>>as you see them when adding buildings.
>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. Once
you know that you can then assign the postcode. All the area of B72 I mapped
out has been walked to get the building numbers first.


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