Re: [Talk-GB] Postcodes

[ndrw6]

On 09/11/2018 19:49, Chris Hill wrote:
I maintain a GB postcode overlay, based on the Codepoint Open 
datasets. This was last updated using the August 2018 data. I expect 
another update shortly. You can see postcodes on a map I provide or 
use the overlay tiles in your favourite editor. More details can be 
found here:


This is a fantastic resource, thank you for making and maintaining it. 
I've been using it for a couple of weeks and almost enjoyed tagging 
postcodes! Sadly, osm.org doesn't seem to make use of addr:postcode tags 
and maps.me is painfully slow when searching for them. But that's a bit 
of a chicken and egg problem, I guess, as there are still not many 
postcodes in the database.


I found it useful to highlight buildings and nodes tagged with 
addr:postcode. Otherwise it is very easy to lose track of what building 
have already been tagged. Below is a JOSM map paint style that does that 
and displays the existing postcodes:


https://pastebin.com/raw/RxKNky3E



If you find any problems please let me know.


Not really problems but:

- Overlapping labels can be difficult to read. Perhaps the script could 
detect co-located postcodes and concatenate them.


- After the update some postcodes point to different buildings (likely 
centroids have changed and snapping function produces a different 
result). That could be a feature. It would be good to have a 
simultaneous access to all versions of tiles.


I also maintain a postcode layer based on the Office of National 
Statistics OGL postcode data (ONSPD). There is currently a problem 
with the way the tiles are generated, which I'm addressing. I believe 
Codepoint Open and ONSPD are pretty much identical with the current 
postcodes, but there is much more historical data in the ONSPD data.


It would be great to have e.g. a JOSM plugin combining address 
information from open sources and making it easy (ideally with a single 
click) to annotate postcodes and/or street names.


Many thanks,

ndrw6


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Re: [Talk-GB] Postcodes

[Chris Hill]

On 09/11/2018 09:38, Tom Hughes wrote:

On 09/11/2018 09:09, Phoenix830 wrote:

I want to add postcodes but I am aware of issues with this being 
copyrighted material.


I maintain a GB postcode overlay, based on the Codepoint Open datasets. 
This was last updated using the August 2018 data. I expect another 
update shortly. You can see postcodes on a map I provide or use the 
overlay tiles in your favourite editor. More details can be found here:


https://codepoint.raggedred.net/ .

I don't agree with either adding the postcode centroids themselves to 
OSM, nor adding postcodes to roads. They are all about delivery points 
not roads. If I find postcode centroids in OSM I routinely delete them.


There are roughly 1.7 million postcodes in GB (the Northern Ireland 
postcodes are not released as opendata). I find that new postcodes are 
created early in the development cycle of new building developments so a 
new postcode exists often before buildings have even been started to be 
built.


If you find any problems please let me know.

I also maintain a postcode layer based on the Office of National 
Statistics OGL postcode data (ONSPD). There is currently a problem with 
the way the tiles are generated, which I'm addressing. I believe 
Codepoint Open and ONSPD are pretty much identical with the current 
postcodes, but there is much more historical data in the ONSPD data.


--
cheers
Chris Hill (chillly)


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Re: [Talk-GB] Postcodes

[David Woolley]

On 09/11/18 16:27, Will Phillips wrote:
Sources such as Companies House don't validate their addresses, so this 
total will certainly include some proportion that are incorrect.


Most sources that do validate ask the user for the postcode an then to 
select the address from the valid ones on the list.  I would say that 
such sources were tainted.


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Re: [Talk-GB] Postcodes

[Robert Whittaker (OSM lists)]

On Fri, 9 Nov 2018 at 17:08, Adam Snape  wrote:
> My conclusion from this is that we can safely map postcodes to the building 
> where their centroids are placed, perhaps avoiding doing so (or adding 
> FIXMEs) on brand new developments.

There is one gotcha to that, which is that PO box addresses, and some
other large user "non-geographic" postcodes are geo-located in
Code-Point Open to the Royal Mail Delivery / Sorting office that
handles that postcode's mail. You don't want to be adding those
postcodes to the Royal Mail depot.

I've got a visualisation of the postcode centroids from Code-Point
open at https://osm.mathmos.net/addresses/pc-stats/ which can be
helpful for mapping. Once you get your eye in and get used to how
postcodes are assigned, you can often (though by no means always)
deduce from the centroid, the layout of buildings, and the locations
of the surrounding centroids, what set of houses/buildings belongs to
each postcode. The blog post at
http://sk53-osm.blogspot.com/2013/12/british-postcodes-on-openstreetmap.html
(already mentioned above) is a useful read in this respect.

Robert.

-- 
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Re: [Talk-GB] Postcodes

[Adam Snape]

Hi

To clarify the question I was asking earlier, this is what the OS say:

"Code-Point Open is created by taking the average of the coordinates of all
the individual addresses in a postcode (provided we have any of sufficient
quality), then snapping to the nearest of those addresses. Code-Point Open
then delivers the coordinates of that address, as representative of the
whole postcode, to a resolution of 1 metre.

The accuracy of a Code-Point Open record could be expressed as, that the
coordinated position will always be within the notional geographical extent
of the postcode."

They do also note that centroids for new postcodes where the buildings
themselves have yet to be surveyed will be given a temporary approximate
position which should be noted as such in the metadata.

My conclusion from this is that we can safely map postcodes to the building
where their centroids are placed, perhaps avoiding doing so (or adding
FIXMEs) on brand new developments.

Kind regards,

Adam

On Fri, 9 Nov 2018, 14:45 SK53  I'm pretty sure that the "centroid" is allocated to the nearest delivery
> point in the postcode which places it over a building. See my (now rather)
> old blog post
> 
> from 2013, and the note by Jenni Tennison. A caveat is, of course, that the
> Land Registry Prices Paid data proved to be an open data mirage.
>
> Please remember that Nominatim has a table (not recently updated) of all
> postcode centroid which are used for searches. These usually show as AB10
> 2## or similar and are at a lowish zoom level.
>
> Judging by taginfo stats we now have around 8-10% of all postcodes mapped,
> and Robert Whittaker's site suggests
>  over 10%, so better than in
> 2013, but nowhere near the level we could get if we adopted a sustained
> campaign to use what information we have.
>
> Personally, I add addr:postcode to streets when: a) it is clear that all
> properties share a postcode, but individual properties have not been
> mapped; and b) when the local authority includes the full postcode on the
> streetname sign (e.g., Gedling & Rushcliffe). In the former case this
> should be regarded as an iterative step towards the desired position of
> individually mapped addresses; in the latter it reflects an on-the-ground
> rule.
>
> 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.
>
> Jerry
>
> On Fri, 9 Nov 2018 at 13:44, Adam Snape  wrote:
>
>> Hi,
>>
>> I ask because the 'centroids' do not appear to be centroids in a pure
>> mathematical sense, they always appear to be placed on a building, never in
>> open space. Now, if this were merely been done by attributing the centroid
>> to the nearest building regardless of whether it actually belongs to the
>> postcode or not, it would serve no purpose. It seems far more likely that
>> it would be attributed to the nearest building belonging to that postcode.
>> If this is the case then it gives us a way of tying these centroids to an
>> actual building within each postcode area and that gives us something
>> tangible to map. Can anybody suggest whether I'm onto something here?
>>
>> Kind regards,
>>
>> Adam
>>
>> On Fri, 9 Nov 2018 at 13:27, David Woolley 
>> wrote:
>>
>>> If centroid has the plain (mathematical) meaning of the word, it will
>>> only fall exactly on the building centre if there is only one building
>>> in the postcode area.
>>>
>>> In practice the building nearest the centroid might have its own
>>> postcode, so you can't rely on the nearest building to the centroid
>>> having that postcode.
>>>
>>> There are, at least theoretically (e.g. a C shaped postcode) where the
>>> centroid is in an adjoining postcode.  I imagine you would get this if
>>> there was a cul-de-sac projecting into a crescent that was small enough
>>> to have one post code.
>>>
>>> On 09/11/18 13:12, Adam Snape wrote:
>>> > Hi,
>>> >
>>> > I agree with not mapping the centroids but...
>>> >
>>> > Is it the case that the centroids are always placed on a building
>>> which
>>> > falls under that postcode? If so, wouldn't it be okay to tag the
>>> > building with the 

Re: [Talk-GB] Postcodes

[Will Phillips]

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





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Re: [Talk-GB] Postcodes

[SK53]

I'm pretty sure that the "centroid" is allocated to the nearest delivery
point in the postcode which places it over a building. See my (now rather)
old blog post

from 2013, and the note by Jenni Tennison. A caveat is, of course, that the
Land Registry Prices Paid data proved to be an open data mirage.

Please remember that Nominatim has a table (not recently updated) of all
postcode centroid which are used for searches. These usually show as AB10
2## or similar and are at a lowish zoom level.

Judging by taginfo stats we now have around 8-10% of all postcodes mapped,
and Robert Whittaker's site suggests
 over 10%, so better than in
2013, but nowhere near the level we could get if we adopted a sustained
campaign to use what information we have.

Personally, I add addr:postcode to streets when: a) it is clear that all
properties share a postcode, but individual properties have not been
mapped; and b) when the local authority includes the full postcode on the
streetname sign (e.g., Gedling & Rushcliffe). In the former case this
should be regarded as an iterative step towards the desired position of
individually mapped addresses; in the latter it reflects an on-the-ground
rule.

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.

Jerry

On Fri, 9 Nov 2018 at 13:44, Adam Snape  wrote:

> Hi,
>
> I ask because the 'centroids' do not appear to be centroids in a pure
> mathematical sense, they always appear to be placed on a building, never in
> open space. Now, if this were merely been done by attributing the centroid
> to the nearest building regardless of whether it actually belongs to the
> postcode or not, it would serve no purpose. It seems far more likely that
> it would be attributed to the nearest building belonging to that postcode.
> If this is the case then it gives us a way of tying these centroids to an
> actual building within each postcode area and that gives us something
> tangible to map. Can anybody suggest whether I'm onto something here?
>
> Kind regards,
>
> Adam
>
> On Fri, 9 Nov 2018 at 13:27, David Woolley 
> wrote:
>
>> If centroid has the plain (mathematical) meaning of the word, it will
>> only fall exactly on the building centre if there is only one building
>> in the postcode area.
>>
>> In practice the building nearest the centroid might have its own
>> postcode, so you can't rely on the nearest building to the centroid
>> having that postcode.
>>
>> There are, at least theoretically (e.g. a C shaped postcode) where the
>> centroid is in an adjoining postcode.  I imagine you would get this if
>> there was a cul-de-sac projecting into a crescent that was small enough
>> to have one post code.
>>
>> On 09/11/18 13:12, Adam Snape wrote:
>> > Hi,
>> >
>> > I agree with not mapping the centroids but...
>> >
>> > Is it the case that the centroids are always placed on a building which
>> > falls under that postcode? If so, wouldn't it be okay to tag the
>> > building with the appropriate postcode?
>> >
>> > Another idea: Given that postcodes (with few exceptrions) apply to only
>> > one street, would it be acceptable to add the postcode tag to the
>> street
>> > where there is only one centroid on the street?
>> >
>> > Kind regards,
>> >
>> > Adam
>> >
>> > On Fri, 9 Nov 2018 at 12:26, Tom Hughes > > > wrote:
>> >
>> > On 09/11/2018 11:44, David Woolley wrote:
>> >  > On 09/11/18 11:34, David Woolley wrote:
>> >  >> if you are only dealing with centroids, I think many have been
>> > mapped
>> >  >> already,
>> >  >
>> >  > > >
>> >  > indicates that at least 2500 have been mapped.
>> >
>> > Yes, but it's a stupid idea, so please don't...
>> >
>> > Tom
>> >
>> > --
>> > Tom Hughes (t...@compton.nu )
>> > http://compton.nu/
>> >
>> > ___
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>> > https://lists.openstreetmap.org/listinfo/talk-gb

Re: [Talk-GB] Postcodes

[Adam Snape]

Hi,

I'm not on about extrapolating postcodes for other buildings on a street,
but we should be able to map the postcode of building on which the centroid
is placed, shouldn't we? Zooming in should allow us to see which building a
centroid is on.

Kind regards,

Adam

On Fri, 9 Nov 2018 at 13:44, Philip Barnes  wrote:

> On Fri, 2018-11-09 at 13:26 +, David Woolley wrote:
> > If centroid has the plain (mathematical) meaning of the word, it
> > will
> > only fall exactly on the building centre if there is only one
> > building
> > in the postcode area.
> >
> > In practice the building nearest the centroid might have its own
> > postcode, so you can't rely on the nearest building to the centroid
> > having that postcode.
> >
> > There are, at least theoretically (e.g. a C shaped postcode) where
> > the
> > centroid is in an adjoining postcode.  I imagine you would get this
> > if
> > there was a cul-de-sac projecting into a crescent that was small
> > enough
> > to have one post code.
> >
> I live in such a road, it is big enough to have different postcodes for
> odd and even numbers. The two centoids are very close together and it
> would not be possible to determine which is which without local
> knowledge.
>
> Phil (trigpoint)
>
>
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Re: [Talk-GB] Postcodes

[Adam Snape]

Hi,

I ask because the 'centroids' do not appear to be centroids in a pure
mathematical sense, they always appear to be placed on a building, never in
open space. Now, if this were merely been done by attributing the centroid
to the nearest building regardless of whether it actually belongs to the
postcode or not, it would serve no purpose. It seems far more likely that
it would be attributed to the nearest building belonging to that postcode.
If this is the case then it gives us a way of tying these centroids to an
actual building within each postcode area and that gives us something
tangible to map. Can anybody suggest whether I'm onto something here?

Kind regards,

Adam

On Fri, 9 Nov 2018 at 13:27, David Woolley 
wrote:

> If centroid has the plain (mathematical) meaning of the word, it will
> only fall exactly on the building centre if there is only one building
> in the postcode area.
>
> In practice the building nearest the centroid might have its own
> postcode, so you can't rely on the nearest building to the centroid
> having that postcode.
>
> There are, at least theoretically (e.g. a C shaped postcode) where the
> centroid is in an adjoining postcode.  I imagine you would get this if
> there was a cul-de-sac projecting into a crescent that was small enough
> to have one post code.
>
> On 09/11/18 13:12, Adam Snape wrote:
> > Hi,
> >
> > I agree with not mapping the centroids but...
> >
> > Is it the case that the centroids are always placed on a building which
> > falls under that postcode? If so, wouldn't it be okay to tag the
> > building with the appropriate postcode?
> >
> > Another idea: Given that postcodes (with few exceptrions) apply to only
> > one street, would it be acceptable to add the postcode tag to the street
> > where there is only one centroid on the street?
> >
> > Kind regards,
> >
> > Adam
> >
> > On Fri, 9 Nov 2018 at 12:26, Tom Hughes  > > wrote:
> >
> > On 09/11/2018 11:44, David Woolley wrote:
> >  > On 09/11/18 11:34, David Woolley wrote:
> >  >> if you are only dealing with centroids, I think many have been
> > mapped
> >  >> already,
> >  >
> >  > 
> >  > indicates that at least 2500 have been mapped.
> >
> > Yes, but it's a stupid idea, so please don't...
> >
> > Tom
> >
> > --
> > Tom Hughes (t...@compton.nu )
> > http://compton.nu/
> >
> > ___
> > Talk-GB mailing list
> > Talk-GB@openstreetmap.org 
> > https://lists.openstreetmap.org/listinfo/talk-gb
> >
> >
> >
> > ___
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> >
>
>
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Re: [Talk-GB] Postcodes

[Philip Barnes]

On Fri, 2018-11-09 at 13:26 +, David Woolley wrote:
> If centroid has the plain (mathematical) meaning of the word, it
> will 
> only fall exactly on the building centre if there is only one
> building 
> in the postcode area.
> 
> In practice the building nearest the centroid might have its own 
> postcode, so you can't rely on the nearest building to the centroid 
> having that postcode.
> 
> There are, at least theoretically (e.g. a C shaped postcode) where
> the 
> centroid is in an adjoining postcode.  I imagine you would get this
> if 
> there was a cul-de-sac projecting into a crescent that was small
> enough 
> to have one post code.
> 
I live in such a road, it is big enough to have different postcodes for
odd and even numbers. The two centoids are very close together and it
would not be possible to determine which is which without local
knowledge.

Phil (trigpoint)


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Re: [Talk-GB] Postcodes

[Adam Snape]

Hi,

I agree with not mapping the centroids but...

Is it the case that the centroids are always placed on a building which
falls under that postcode? If so, wouldn't it be okay to tag the building
with the appropriate postcode?

Another idea: Given that postcodes (with few exceptrions) apply to only one
street, would it be acceptable to add the postcode tag to the street where
there is only one centroid on the street?

Kind regards,

Adam

On Fri, 9 Nov 2018 at 12:26, Tom Hughes  wrote:

> On 09/11/2018 11:44, David Woolley wrote:
> > On 09/11/18 11:34, David Woolley wrote:
> >> if you are only dealing with centroids, I think many have been mapped
> >> already,
> >
> > 
> > indicates that at least 2500 have been mapped.
>
> Yes, but it's a stupid idea, so please don't...
>
> Tom
>
> --
> Tom Hughes (t...@compton.nu)
> http://compton.nu/
>
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Re: [Talk-GB] Postcodes

[Tom Hughes]

On 09/11/2018 11:44, David Woolley wrote:

On 09/11/18 11:34, David Woolley wrote:
if you are only dealing with centroids, I think many have been mapped 
already,


 
indicates that at least 2500 have been mapped.


Yes, but it's a stupid idea, so please don't...

Tom

--
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http://compton.nu/

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Re: [Talk-GB] Postcodes

[Dan S]

Op vr 9 nov. 2018 om 10:41 schreef Paul Berry :
>
> Would the etiquette here be to tag the objects with source=local knowledge if 
> you happen to know the postcode without looking it up (or it's on signage, 
> etc)?

Hi - two slightly different things in your question there - the
convention is, as far as I understand it, to use
source=local_knowledge if you happen to know it from being there
yourself or a local tells you, and source=survey if you see it on
signage.

As far as I know, there's some disagreement about whether and how
"disembodied" postcodes should be added, but I do often add postcodes
e.g. on specific shops or addresses where I've got it first-hand (e.g.
from the shop window)

Best
Dan


> On Fri, 9 Nov 2018 at 09:38, Tom Hughes  wrote:
>>
>> On 09/11/2018 09:09, Phoenix830 wrote:
>>
>> > I want to add postcodes but I am aware of issues with this being
>> > copyrighted material.
>>
>> Add them to what exactly?
>>
>> > I have come across https://postcodes.io which states it is from open
>> > sources. I have contacted them here
>> > https://ideal-postcodes-support.herokuapp.com/channel/support .
>> >
>> > They have confirmed that this data is released under the Open Government
>> > Licence
>> > http://www.nationalarchives.gov.uk/doc/open-government-licence/version/2/ .
>>
>> That data set only gives a centroid for each post code though, it
>> doesn't tell you what postcode a particular building has.
>>
>> > I am not bulk adding these (I do not have the technical knowledge or
>> > time) I am just adding postcodes to properties as I add them.
>>
>> So how are you working out which postcode to use? Sometimes it is
>> fairly obvious from the centroid location but it often isn't.
>>
>> Tom
>>
>> --
>> Tom Hughes (t...@compton.nu)
>> http://compton.nu/
>>
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Re: [Talk-GB] Postcodes

[David Woolley]

On 09/11/18 11:34, David Woolley wrote:
if you are only dealing with centroids, I think many have been mapped 
already,


 
indicates that at least 2500 have been mapped.


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Re: [Talk-GB] Postcodes

[David Woolley]

On 09/11/18 09:09, Phoenix830 wrote:
They have confirmed that this data is released under the Open Government 
Licence 
http://www.nationalarchives.gov.uk/doc/open-government-licence/version/2/ .





There is a gotcha in the OGL regarding restricted upstream sources, so 
OGL is probably not enough.  In any case, if you are only dealing with 
centroids, I think many have been mapped already, and, if not, you 
should use the OS Open Data source for those, not take them from a site 
whose business model depends on accumulating their own database of 
detailed postcode information.


As pointed out, you cannot say that a particular property has a 
particular postcode just because the nearest postcode centroid has that 
postcode.  You need to individually verify each property.




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Re: [Talk-GB] Postcodes

[Paul Berry]

Would the etiquette here be to tag the objects with *source=local knowledge*
if you happen to know the postcode without looking it up (or it's on
signage, etc)?

Regards,
*Paul*

On Fri, 9 Nov 2018 at 09:38, Tom Hughes  wrote:

> On 09/11/2018 09:09, Phoenix830 wrote:
>
> > I want to add postcodes but I am aware of issues with this being
> > copyrighted material.
>
> Add them to what exactly?
>
> > I have come across https://postcodes.io which states it is from open
> > sources. I have contacted them here
> > https://ideal-postcodes-support.herokuapp.com/channel/support .
> >
> > They have confirmed that this data is released under the Open Government
> > Licence
> >
> http://www.nationalarchives.gov.uk/doc/open-government-licence/version/2/
>  .
>
> That data set only gives a centroid for each post code though, it
> doesn't tell you what postcode a particular building has.
>
> > I am not bulk adding these (I do not have the technical knowledge or
> > time) I am just adding postcodes to properties as I add them.
>
> So how are you working out which postcode to use? Sometimes it is
> fairly obvious from the centroid location but it often isn't.
>
> Tom
>
> --
> Tom Hughes (t...@compton.nu)
> http://compton.nu/
>
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Re: [Talk-GB] Postcodes

[Tom Hughes]

On 09/11/2018 09:09, Phoenix830 wrote:

I want to add postcodes but I am aware of issues with this being 
copyrighted material.


Add them to what exactly?

I have come across https://postcodes.io which states it is from open 
sources. I have contacted them here 
https://ideal-postcodes-support.herokuapp.com/channel/support .


They have confirmed that this data is released under the Open Government 
Licence 
http://www.nationalarchives.gov.uk/doc/open-government-licence/version/2/ .


That data set only gives a centroid for each post code though, it
doesn't tell you what postcode a particular building has.

I am not bulk adding these (I do not have the technical knowledge or 
time) I am just adding postcodes to properties as I add them.


So how are you working out which postcode to use? Sometimes it is
fairly obvious from the centroid location but it often isn't.

Tom

--
Tom Hughes (t...@compton.nu)
http://compton.nu/

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[Talk-GB] Postcodes

[Phoenix830]

Hello
I have started added properties in my local area from my own knowledge. Either 
gathered from my own residing or from friends and from lots of walks.
I want to add postcodes but I am aware of issues with this being copyrighted 
material.
I have come across https://postcodes.io which states it is from open sources. I 
have contacted them here 
https://ideal-postcodes-support.herokuapp.com/channel/support .
They have confirmed that this data is released under the Open Government 
Licence 
http://www.nationalarchives.gov.uk/doc/open-government-licence/version/2/ .
I understand the complications will be huge if I use the wrong data source so I 
simply want clarification if the postcodes found on this site would be safe and 
legal to do so.
I am not bulk adding these (I do not have the technical knowledge or time) I am 
just adding postcodes to properties as I add them.
Kind Regards___
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