James, I was talking last week about municipal boundaries for Quebec province.
Geobase provides various administrative boundaries. See
http://www.geobase.ca/geobase/en/data/admin/index.html
The municipal boundaries (admin_level=8) are provided by each province.
Admin_level 6 is also available for Ontario. The Shape files have to be
converted to OSM.
The aboriginal land territories are in a separate file.
I have not looked at other limits. Some provinces may provide limits. I
contacted province of Québec Open Data site with no success so far.
Boundary limits are the bone of OSM. They are essential but new mappers may
often break the polygons. Experienced mappes should monitor and contact less
experienced people to teach them very diplomatically when they break essential
information. To this regard, the Watch tool helps me to monitor this
information by receiving an email every time limits are modified. This morning
I received an alert, checked rapidly and saw that a mapper from Maine modified
a boundary limit to connect a county from Maine to the Canada / US border.
Having an early alert, if there is any problem we can simpy revert before other
modifications are made to the OSM database.
It is also good to save a copy of the osm file of the administrative limits.
This way it is easy to revert if you have any problem with undelete or revert
tools.
Looking at the history of your Lamont county way, I see that is also part of
Strathcona county relation. This polygon is also broken. See
http://www.openstreetmap.org/browse/relation/50382
A good mess! Many new mappers don't know about relations and don't care when
asked if they want to delete even if the way is part of a relation.
There is a tool that shows all the ways with boundary limits, even if they are
not part of a relation. I have not checked, but it might be Inspector
http://tools.geofabrik.de/osmi/
Pierre
>________________________________
> De : James Ewen <[email protected]>
>À : talk-ca <[email protected]>
>Envoyé le : Lundi 29 octobre 2012 20h22
>Objet : Re: [Talk-ca] Suivi OSM / OSM Monitoring
>
>2012/10/29 Pierre Béland <[email protected]>:
>
>> Since OSM is a collaborative project, experienced contributors who monitor
>> changes to OSM need monitoring tools. There are many like KeepRight,
>> Inspector or http://layers.openstreetmap.fr/.
>
>> Contributors may follow edits such as hiking trails or bike lanes, or items
>> such as main roads and administrative boundaries, wich are essential to
>> tools such as Nominatim or Road travel.
>
>This piqued my interest, especially the layers.openstreetmap.fr link.
>
>Political, geopolitical, territorial, and administrative boundaries
>have always been of interest to me in the OSM project. Many years ago
>I attempted to trace out the boundary of the county in which I live. I
>was at the time trying to figure out how to create a polygon that
>shared boundaries with neighboring areas, or road centerlines, etc...
>I had one heck of a time trying to get it in there, but I think I
>finally succeeded. But then people would come along and wipe out a
>segment or two and the county outline was gone. I have given up
>chasing after trying to fix the boundary.
>
>Here's part of it that still exists since it is in a rural area where
>no one pokes and prods...
>
>http://www.openstreetmap.org/browse/way/23502499
>
>I see that Canada is pretty good at the admin2 (Country) level, and
>the admin4 level (Regions) except for a few islands in the Hudson and
>James Bay areas. It looks like BC has had the admin6 (Departments)
>level imported, but the rest of Canada is blank except for a small
>section in north central Manitoba. Is this information available in
>the freely available datasets out there? I'd like to get the counties,
>municipal districts, improvement districts, special areas, specialized
>municipalities, and cities of Alberta imported, I just need to figure
>out where to find them.
>
>There are also election boundary layers in OSM. There are a number of
>them available. Is there a list of which would be Federal, Provincial,
>and Municipal layers? What about boundaries for other things? How
>would they get tagged? Of interest to me is the Environment Canada
>weather alerting boundaries. It would be nice to be able to include
>those boundaries in the OSM dataset. Can you create custom admin
>levels?
>
>--
>James
>VE6SRV
>
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