[OSM-talk-be] Completing the belgian postal code boundaries

Pierre Parmentier pierrecparmentier at gmail.com
Fri Dec 10 14:33:50 UTC 2021 

Hello Pieter,

Nice view and helpful.

Some comments:

   - There is a problem for Buzenol. I shall try to fix it.
   - The commune/gemeente Ixelles is in two parts. East and west of avenue
   Louise/Louizalaan. On the west side there is no identification.
   Enclave/exclave!

I have completed all postal_code boundaries in the province of Luxembourg.
It was done at the request of user 'jfonda' who added many addresses in SE
Belgium.

When doing so:

   1. I created relations with boundary=postal_code + type=boundary +
   name=nnnn + postal_code=nnnn tags
   2. The tag name is useful in the relations list in JOSM. It makes it
   easy to find a relation in the list!
   3. The boundaries are based on bpost (1) for the *approximate* direction
   of the ways.
   4. As it appears that the postal boundaries are often based on
   admin_level=9 boundaries, I add these boundaries first.
   5. admin_level=9 boundaries are from the Belgian MinFin web site.
   6. If we create postal_code boundaries from bpost data we will only get
   *approximate* boundaries. And we will add unnecessary ways to OSM!
   7. Furthermore we will create a separate network and, later on,
   difficulties to merge the tripoints of both networks.
   8. When it appears that admin_level=9 and boundary=postal_code
   boundaries are the same, I am in favor of creating a separate relation. Not
   to give the admin_level=9 an additional tag.

Pierre

(1) Namespace BE.BPOST; Resource identifier
2b1a5f4f-5263-11ea-8b43-34e12d0f0423;
https://www.geo.be/catalog/details/2b1a3840-5263-11ea-acd1-34e12d0f0423?l=en



Le ven. 10 déc. 2021 à 13:07, <talk-be-request at openstreetmap.org> a écrit :

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> Today's Topics:
>
>    1. Completing the belgian postal code boundaries
>       (Pieter Vander Vennet)
>    2. Re: Completing the belgian postal code boundaries
>       (Pieter Vander Vennet)
>    3. Re: Completing the belgian postal code boundaries
>       (Jonathan Beli?n)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu,  9 Dec 2021 16:49:51 +0000
> From: Pieter Vander Vennet <pietervdvn at posteo.net>
> To: talk-be at openstreetmap.org
> Subject: [OSM-talk-be] Completing the belgian postal code boundaries
> Message-ID: <5fcdf3f6-a03a-bb97-d60c-9db9a125a6c7 at posteo.net>
> Content-Type: text/plain; charset="utf-8"; Format="flowed"
>
> Hi all,
>
> Recently, I got the challenge to get all postal codes in Belgium. Turns
> out that there is no open dataset available to do this (yet).
>
> OpenStreetMap already got me a long way (hooray!) but Wallonia is still
> a bit... lacking and has big holes. Time to fix this!
>
> (Of course, I also setup a MapComplete theme with the postal codes
> <
> https://pietervdvn.github.io/mc/develop/postal_codes.html?z=9&lat=50.51866&lon=5.158081&fs-export=true&language=en#relation/224757
> >)
>
> So, after some talk on Matrix, I downloaded an Open Address dataset
> <https://opendata.bosa.be/index.nl.html> (with postal codes) of
> Wallonia. A few scripts later, I had a geojson of addresses for every
> postal code, which I then could run through a convex hull algorithm,
> getting the boundaries of each postal code with an open license...
>
>
> The last step is to get these outlines integrated into OSM. While it is
> quite fun to map, adding a few hundred of them is a bit too much work,
> which is why I'm asking you all for some help. If you have experience
> with JOSM and have spare time, please, pick out a few postal code
> boundaries and add them.
>
> *How to add a postal code boundary
> *
>
> 1. Grab the dataset over here
> <
> https://github.com/pietervdvn/pietervdvn.github.io/blob/master/missing_postal_code_boundaries.geojson>2.
>
> Load the data into JOSM
> 3. Download the OSM-boundary data of the relevant area (e.g. with the
> 'query overpass'-mode in the download field)
> 4. Create a multipolygon-relation, reusing already existing border lines
> of create a new line alltogether. /It is discouraged to use the actual
> geometry, as they can be jittery and jump from address point to address
> point
> /5. Upload the data
> 6. ????
> 7. Profit!
> //
>
> //Kind regards,
> Pieter
>
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> ------------------------------
>
> Message: 2
> Date: Thu,  9 Dec 2021 16:55:10 +0000
> From: Pieter Vander Vennet <pietervdvn at posteo.net>
> To: talk-be at openstreetmap.org
> Subject: Re: [OSM-talk-be] Completing the belgian postal code
>         boundaries
> Message-ID: <94af6f56-241b-ddcf-1984-36d95fdc246e at posteo.net>
> Content-Type: text/plain; charset="utf-8"; Format="flowed"
>
> PS: The tagging for a postal code boundary relation is: `type=boundary;
> boundary=postal_code; postal_code=*`. Alternatively, if a postal code
> aligns 100% with an administrative boundary, one can also add
> `postal_code=*` on it.
>
> addr:postcode or addr:postalcode are incorrect for this purpose - there
> are still a few of those out there, but I'm gradually cleaning them up.
>
> Kind regards,
> Pieter
>
> On 09.12.21 17:49, Pieter Vander Vennet wrote:
> >
> > Hi all,
> >
> > Recently, I got the challenge to get all postal codes in Belgium.
> > Turns out that there is no open dataset available to do this (yet).
> >
> > OpenStreetMap already got me a long way (hooray!) but Wallonia is
> > still a bit... lacking and has big holes. Time to fix this!
> >
> > (Of course, I also setup a MapComplete theme with the postal codes
> > <
> https://pietervdvn.github.io/mc/develop/postal_codes.html?z=9&lat=50.51866&lon=5.158081&fs-export=true&language=en#relation/224757
> >)
> >
> > So, after some talk on Matrix, I downloaded an Open Address dataset
> > <https://opendata.bosa.be/index.nl.html> (with postal codes) of
> > Wallonia. A few scripts later, I had a geojson of addresses for every
> > postal code, which I then could run through a convex hull algorithm,
> > getting the boundaries of each postal code with an open license...
> >
> >
> > The last step is to get these outlines integrated into OSM. While it
> > is quite fun to map, adding a few hundred of them is a bit too much
> > work, which is why I'm asking you all for some help. If you have
> > experience with JOSM and have spare time, please, pick out a few
> > postal code boundaries and add them.
> >
> > *How to add a postal code boundary
> > *
> >
> > 1. Grab the dataset over here
> > <
> https://github.com/pietervdvn/pietervdvn.github.io/blob/master/missing_postal_code_boundaries.geojson>2.
>
> > Load the data into JOSM
> > 3. Download the OSM-boundary data of the relevant area (e.g. with the
> > 'query overpass'-mode in the download field)
> > 4. Create a multipolygon-relation, reusing already existing border
> > lines of create a new line alltogether. /It is discouraged to use the
> > actual geometry, as they can be jittery and jump from address point to
> > address point
> > /5. Upload the data
> > 6. ????
> > 7. Profit!
> >
> > Kind regards,
> > Pieter
> >
> >
> > _______________________________________________
> > Talk-be mailing list
> > Talk-be at openstreetmap.org
> > https://lists.openstreetmap.org/listinfo/talk-be
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> ------------------------------
>
> Message: 3
> Date: Thu, 09 Dec 2021 18:37:05 +0100
> From: Jonathan Beli?n <list at jbelien.be>
> To: talk-be at openstreetmap.org
> Subject: Re: [OSM-talk-be] Completing the belgian postal code
>         boundaries
> Message-ID: <bfd70f80-7d48-4c32-9aba-1f027b91a750 at www.fastmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Excellent initiative Pieter !
>
> I think we should also check with the official postal code dataset from
> *bpost* !
> The dataset itself is useless (not open data and bad geometry) but I think
> it can be used to visually compare.
>
> You can view that dataset here :
> https://www.geo.be/catalog/details/2b1a3840-5263-11ea-acd1-34e12d0f0423?l=en
>
> There are some "weird" postal codes situation that geometry based on
> addresses won't take into account.
>
> Have a nice evening.
>
> Jonathan Beli?n
>
>
> Jeu 09 d?c 2021, ? 17:55, Pieter Vander Vennet a ?crit?:
> >
> > PS: The tagging for a postal code boundary relation is: `type=boundary;
> boundary=postal_code; postal_code=*`. Alternatively, if a postal code
> aligns 100% with an administrative boundary, one can also add
> `postal_code=*` on it.
> >
> > addr:postcode or addr:postalcode are incorrect for this purpose - there
> are still a few of those out there, but I'm gradually cleaning them up.
> >
> > Kind regards,
> > Pieter
> >
> > On 09.12.21 17:49, Pieter Vander Vennet wrote:
> >>
> >> Hi all,
> >>
> >> Recently, I got the challenge to get all postal codes in Belgium. Turns
> out that there is no open dataset available to do this (yet).
> >>
> >>
> >> OpenStreetMap already got me a long way (hooray!) but Wallonia is still
> a bit... lacking and has big holes. Time to fix this!
> >>
> >> (Of course, I also setup a MapComplete theme with the postal codes <
> https://pietervdvn.github.io/mc/develop/postal_codes.html?z=9&lat=50.51866&lon=5.158081&fs-export=true&language=en#relation/224757
> >)
> >>
> >> So, after some talk on Matrix, I downloaded an Open Address dataset <
> https://opendata.bosa.be/index.nl.html> (with postal codes) of Wallonia.
> A few scripts later, I had a geojson of addresses for every postal code,
> which I then could run through a convex hull algorithm, getting the
> boundaries of each postal code with an open license...
> >>
> >>
> >>
> >> The last step is to get these outlines integrated into OSM. While it is
> quite fun to map, adding a few hundred of them is a bit too much work,
> which is why I'm asking you all for some help. If you have experience with
> JOSM and have spare time, please, pick out a few postal code boundaries and
> add them.
> >>
> >> *How to add a postal code boundary*
> >>
> >>
> >> 1. Grab the dataset over here
>  <
> https://github.com/pietervdvn/pietervdvn.github.io/blob/master/missing_postal_code_boundaries.geojson>2.
> Load the data into JOSM
> >> 3. Download the OSM-boundary data of the relevant area (e.g. with the
> 'query overpass'-mode in the download field)
> >> 4. Create a multipolygon-relation, reusing already existing border
> lines of create a new line alltogether. *It is discouraged to use the
> actual geometry, as they can be jittery and jump from address point to
> address point
> *5. Upload the data
> >> 6. ????
> >> 7. Profit!
> >>
> >>
> >> Kind regards,
> >> Pieter
> >>
> >>
> >> _______________________________________________
> >> Talk-be mailing list
> >> Talk-be at openstreetmap.org
> >> https://lists.openstreetmap.org/listinfo/talk-be
> >>
> > _______________________________________________
> > Talk-be mailing list
> > Talk-be at openstreetmap.org
> > https://lists.openstreetmap.org/listinfo/talk-be
> >
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