[talk-ch] Differences in Municipalities to swissboundaries

Simon Poole simon at poole.ch
Fri Sep 9 16:22:46 CEST 2022

Just as a further twist, one thing that swisstopo has started doing is 
showing municipality borders in the Lake Constance / Bodensee that it 
claims are "technical" (as we all should know there are no actual 
borders in the Bodensee). I'm working on the assumption that we will 
continue to ignore these, maybe one day we'll even be able to do away 
with our fake borders there too.

Am 07.09.2022 um 14:25 schrieb Simon Poole:
> We were just discussing this today.
> Essentially there's been a change of policy in some of the cantons 
> that the BfS didn't document when it happened as far as can be 
> determined at this point in time. This is not a dramatic issue as it 
> literally just concerns water (and that just in a couple of places).
> There is however a larger issue that is being worked on that simply 
> follows from on the one hand how the borders were originally processed 
> and on the other hand that over the last decade there have been many 
> small corrections to the borders outside of just the mergers and 
> similar changes that probably require a re-syncing with the swisstopo 
> data (which prior to last year would have required getting permission 
> on a case by case base).  I suspect we should have something available 
> in a couple of weeks, actually updating the borders themselves is 
> likely to take months till complete.
> Feel free to update the borders if there is something of specific 
> interest to you, but any change will probably be redone when the above 
> is in place.
> Simon
> Am 07.09.2022 um 08:39 schrieb GMUER Daniel:
>> Hi all.
>> As far as I understand there was an Import of the 
>> Municipalityboundaries from swissboundaries at around 2011 [1]. There 
>> are also annual “Municipality Mergers” [2] for municipalities that 
>> were merged.
>> Is there is also a defined workflow to keep changes on the geometries 
>> of the municipalityboundaries (admin_level=8) up to date in 
>> openstreetmap? For example, right now there are differences in Lakes 
>> like Lago Maggiore, Lago di Lugano and Lac Léman where the boundaries 
>> in osm follow the coastline but in swissboundaries the middle of the 
>> lakes. There are also other changes e.g. [3] that are not up to date 
>> in osm [4].
>> If there is no such workflow, I assume it is ok to adjust the border 
>> manually by following the vertexes of swissboundaries?
>> Thanks for your advice
>> Daniel
>> [1] https://wiki.openstreetmap.org/wiki/EN:Switzerland/swissBOUNDARIES3D
>> [2] 
>> https://wiki.openstreetmap.org/wiki/Switzerland/2022_Municipality_Mergers
>> [3] 
>> https://www.bern-ost.ch/MuensingenRubigen---Grenzverlauf-bereinigt-602417
>> [4] https://www.openstreetmap.org/#map=19/46.87921/7.54186
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