[OSM-talk-be] cadastral plan now open data

[Lionel Giard]

I'm not supporting the addition of this WMS neither, as it is more
imprecise than others sources for most of the data. So the question about
the license is not really important in that case. The regional sources for
buildings, parcels, streets,... are almost always with a better precision.

One important thing that the cadastre give, is the administrative boundary
as it is the authorithy on this subject (to keep the cohesion with parcels
and administrative boundaries) as explained here
https://data.gov.be/fr/dataset/b47f2ffd-ebc9-413c-903f-d83af520fcdb (you
can choose the language at the top left of the page) :
*"The General Administration of Patrimonial Documentation of the FPS
Finances was designated by the other institutes as being the authentic
source for this database and manages it as such"* -> this is the layer
"B_CaPa" in the downloadable data. So this would be the useful part of the
cadastre, But i don't think we need the wms for that, if we want to improve
the administrative boundary, we can just download the layer and use it as a
base, to re-position the boundaries.

Le ven. 21 sept. 2018 à 12:49, joost schouppe <joost.schouppe at gmail.com> a
écrit :

> Hi,
>
> André asked to include the WMS of this service by default in the JOSM
> repository. A long conversation ensued. Some of the confusion is caused by
> the fact that the WMS probably contains outdated license info. I have now
> asked the FOD Finances for a second time to clarify this. The ticket was
> closed, which is probably a good thing, as it is probably not a good idea
> to show this data by default in JOSM anyway!
>
> But even for the license of the downloadable files the JOSM team seemed a
> bit worried: https://josm.openstreetmap.de/ticket/16693#comment:7
> When I read the license, I felt attribution requierement in the license
> was defined loosely enough that mentioning it under Contributors would be
> enough. It would be nice to hear from other people how they interpret this
> license.
>
> Op vr 24 aug. 2018 om 13:58 schreef joost schouppe <
> joost.schouppe at gmail.com>:
>
>> Hi,
>>
>> The cadastral plan is now open data for the entire country!
>>
>> That's pretty big because:
>> - for Wallonia, it's the first open vector data with parcels, buildings,
>> roads and road names.
>> - contains "underground buildings" which were not available anywhere
>> AFAIK.
>> - there's a dataset with roads that have some kind of
>> "erfdienstbaarheid"/"servitude". This might be of use for certain dubious
>> paths
>>
>> But of course, please note:
>> - there is way more data where this came from - the attributes of the
>> parcel are not included (like building levels, number of units, landuse)
>> - Belgian cadastre data has a bad reputation in general so do not trust
>> everything you see. The building geometry seems to be quite poor,
>> especially when it comes to exact positioning, not so much the shape itself.
>> - do not trust road name data (it doesn't follow the CRAB name, so not
>> official in Flanders). Names are often abbreviated
>> - the roads do not form a network, there are duplicate geometries and
>> some geometries are outdated by half a century
>> - there is pretty good metadata included. However, you might find data
>> that does not follow the explained model
>>
>> The license file is included in any download. It seems to be compatible
>> with OSM, but it would be nice if more people give it a good read. The
>> first one to use it for mapping, does need to add it to
>> https://wiki.openstreetmap.org/wiki/Contributors
>>
>> The data is in shapefile format (boooo!), but Philippe Duchesne has made
>> a download site where you can get it in geopackage format. There is also a
>> "view" link. To actually see the data there, find the big switches to
>> activate the layers you want to see. The bigger ones take a while to load!
>>
>> More details:
>> * Official website:
>>
>> https://financien.belgium.be/nl/particulieren/woning/kadaster/kadastraal-plan
>>
>> https://finances.belgium.be/fr/particuliers/habitation/revenu_cadastral/plan-cadastral
>>
>> * Metadata:
>>
>> https://financien.belgium.be/sites/default/files/20180626_Dataspecificaties.pdf
>>
>> https://finances.belgium.be/sites/default/files/20180626_Specificationsdata.pdf
>>
>> * Repackaged into an open data format:
>> http://data.highlatitud.es/cadaster-belgium/
>>
>> We think this data will only be usable for validation efforts. If you
>> think an import could be useful for some of the data in some places, do not
>> forget to follow the Import Guidelines or risk having your work reverted.
>>
>> Happy mapping,
>> --
>> Joost Schouppe
>> OpenStreetMap <http://www.openstreetmap.org/user/joost%20schouppe/> |
>> Twitter <https://twitter.com/joostjakob> | LinkedIn
>> <https://www.linkedin.com/pub/joost-schouppe/48/939/603> | Meetup
>> <http://www.meetup.com/OpenStreetMap-Belgium/members/97979802/>
>>
>
>
> --
> Joost Schouppe
> OpenStreetMap <http://www.openstreetmap.org/user/joost%20schouppe/> |
> Twitter <https://twitter.com/joostjakob> | LinkedIn
> <https://www.linkedin.com/pub/joost-schouppe/48/939/603> | Meetup
> <http://www.meetup.com/OpenStreetMap-Belgium/members/97979802/>
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