Here in BC they are set by municipal bylaw and renewed every 5 years. Very
much stable enough to map in OSM.

Corey

On Fri, Jan 11, 2019 at 2:27 PM Bernie Connors <bernie.conn...@unb.ca>
wrote:

> I can confirm the BIA boundaries are modified very infrequently in New
> Brunswick.  I am not aware of any changes during the 10 years in my current
> job disseminating GIS data for for the province.
>
> Bernie.
>
> On Wed, Jan 9, 2019, 2:45 PM Matthew Darwin <matt...@mdarwin.ca wrote:
>
>> Hi Harald,
>>
>> Thanks for your thoughts on this.
>>
>> From my point of view BIAs are just as (just as not) verifiable on the
>> ground as a municipality boundary.  Typically there are gateway signs to
>> welcome you to the area, which makes them more concrete then say a census
>> area. eg
>> https://www.mapillary.com/app/?lat=45.331875926798006&lng=-75.892906002273&z=19.36453946996015&pKey=RopOOODg6gMzdE5gHeicfA&focus=photo&x=0.4894869294322967&y=0.5000000000000003&zoom=0
>> or
>> https://www.mapillary.com/app/?lat=45.39710000000002&lng=-75.7423&z=17&pKey=pEs0qv8z4ielD2jmRpJhqw&focus=photo&x=0.11741761625032077&y=0.5560308877526301&zoom=2.639780018331806
>> so just like a municipality boundary there is some physical info, but of
>> course doesn't tell you the exact boundary area.
>>
>> In my experience BIA boundaries don't change much one they are
>> created.... but of course I am not familiar of what happens outside of
>> Ontario.... certainly I wouldn't expect them to change more than the
>> boundaries we already have in OSM for municipalities and the wards within
>> them which seem to change change every decade or so in a growing/changing
>> municipality.
>>
>>
>> On 2019-01-09 12:34 p.m., Harald Kliems wrote:
>>
>> To me this is a clear case of something that doesn't belong in OSM. It
>> sounds like the boundaries aren't verifiable on the ground and may change
>> frequently. Therefore any data in OSM would go stale quickly and the only
>> verification of accuracy would be to go back to the source.
>> Yes, we have deviations from the "verifiable on the ground" rule, but
>> we've had similar discussions for census boundaries, ridings/election
>> districts, and on the the talk-us list recently about Bureau of Land
>> Management boundaries.
>>
>> For your analysis of businesses within a BIA, you can just download the
>> OSM and BIA boundary data separately and do the analysis in the GIS
>> application of your choice.
>>
>>  Harald.
>>
>> On Mon, Jan 7, 2019 at 6:32 PM Matthew Darwin <matt...@mdarwin.ca> wrote:
>>
>>> Hello all,
>>>
>>> I'm not sure if this applies to other provinces or not, so I thought I
>>> would ask here.
>>>
>>> In Ontario there is a concept of "Business Improvement Area" ("BIA" for
>>> short) that has the power to tax businesses within their zone  (see
>>> http://www.mah.gov.on.ca/Page1529.aspx for details).
>>>
>>> I want to tag these in OSM, so then you can run a query to find all
>>> businesses within a BIA. Sometimes the boundaries of the BIA are very tight
>>> and just cover things that are actual businesses, and sometimes the
>>> boundaries of a BIA are very loose and cover lots of area including
>>> residential... and when a new business comes up later in that area it
>>> automatically is a part of the BIA.
>>>
>>> I am thinking that the *relation type=boundary,
>>> boundary=local_authority *might be applicable here, and define either a
>>> Canada specific definition maybe just Ontario, depending if the concept
>>> exists elsewhere.
>>>
>>> I would like to get people's opinion on this idea....  Or please suggest
>>> something else.
>>>
>>>
>>> https://wiki.openstreetmap.org/wiki/Tag%3Aboundary%3Dlocal_authority
>>>
>>>    - type <https://wiki.openstreetmap.org/wiki/Key:type>=boundary
>>>    <https://wiki.openstreetmap.org/wiki/Tag:type%3Dboundary>
>>>    - boundary <https://wiki.openstreetmap.org/wiki/Key:boundary>=
>>>    local_authority
>>>    - name <https://wiki.openstreetmap.org/wiki/Key:name>=*
>>>    - local_authority:CA
>>>    
>>> <https://wiki.openstreetmap.org/w/index.php?title=Key:local_authority:FR&action=edit&redlink=1>
>>>    =BIA
>>>
>>>
>>> _______________________________________________
>>> Talk-ca mailing list
>>> Talk-ca@openstreetmap.org
>>> https://lists.openstreetmap.org/listinfo/talk-ca
>>>
>>
>>
>> --
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