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

[Pieter Vander Vennet]

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
>
>
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