Re: [Talk-GB] Nominatim and postcodes

[Dan S]

Search engine has answers:

https://wiki.openstreetmap.org/wiki/Nominatim/FAQ#My_postcode_is_missing.2Fwrong_but_I.27ve_fixed_it_in_the_OSM_data._What_is_wrong.3F

https://help.openstreetmap.org/questions/22731/nominatim-returns-no-results-when-searching-with-a-postcode



2018-01-10 14:49 GMT+00:00 Mark Goodge :
> I tried searching on OSM for a postcode, which I know exists, but it
> returned zero entries from Nominatim. Other postcode searches work fine.
>
> Can anyone tell me where Nominatim gets its data from for a postcode search,
> and how often it's updated?
>
> Mark
>
> ___
> Talk-GB mailing list
> Talk-GB@openstreetmap.org
> https://lists.openstreetmap.org/listinfo/talk-gb

___
Talk-GB mailing list
Talk-GB@openstreetmap.org
https://lists.openstreetmap.org/listinfo/talk-gb

Re: [Talk-GB] Nominatim and postcodes

[SK53]

You'd probably get more accurate answers by asking on the Nominatim list.

AFAIK it uses Codepoint Open, but I have no idea if this gets refreshed
regularly, see
https://github.com/openstreetmap/Nominatim/blob/master/data/gb_postcode_table.sql
.

Jerry

On 10 January 2018 at 14:49, Mark Goodge  wrote:

> I tried searching on OSM for a postcode, which I know exists, but it
> returned zero entries from Nominatim. Other postcode searches work fine.
>
> Can anyone tell me where Nominatim gets its data from for a postcode
> search, and how often it's updated?
>
> Mark
>
> ___
> Talk-GB mailing list
> Talk-GB@openstreetmap.org
> https://lists.openstreetmap.org/listinfo/talk-gb
>
___
Talk-GB mailing list
Talk-GB@openstreetmap.org
https://lists.openstreetmap.org/listinfo/talk-gb

Re: [Talk-GB] Nominatim and postcodes

[David Woolley]

On 10/01/18 14:49, Mark Goodge wrote:
I tried searching on OSM for a postcode, which I know exists, but it 
returned zero entries from Nominatim. Other postcode searches work fine.


Can anyone tell me where Nominatim gets its data from for a postcode 
search, and how often it's updated?




I assume it gets it from the map, in which case it gets updated when 
mappers update it, which, for many places means that they have never 
been provided.


The problem with postcodes is that they are owned by Royal Mail, who 
consider them a valuable piece of intellectual property.  Post codes get 
entered into OSM based on post code centroid information that is release 
through OS with a suitable sub-licence.  As the result of extracting 
post codes from signs on building, and similar sources, and as a result 
of taking them from certain database with an open licence, where the 
postcodes were contributed by the operators of the premises, in 
particular, the Food Standards Agency's Food Hygiene Rating System database.


As such, it is very difficult to get reliable post codes for domestic 
premises, as it would basically require a house to house survey.


___
Talk-GB mailing list
Talk-GB@openstreetmap.org
https://lists.openstreetmap.org/listinfo/talk-gb

[Talk-GB] Nominatim and postcodes

[Mark Goodge]

I tried searching on OSM for a postcode, which I know exists, but it 
returned zero entries from Nominatim. Other postcode searches work fine.


Can anyone tell me where Nominatim gets its data from for a postcode 
search, and how often it's updated?


Mark

___
Talk-GB mailing list
Talk-GB@openstreetmap.org
https://lists.openstreetmap.org/listinfo/talk-gb