[Talk-ca] Municipal boundaries

James james2432 at gmail.com
Tue Mar 7 15:11:17 UTC 2017


Quebec's Open Data portal just points to the city portals which each have
their own license....(usually CC-BY)

https://www.donneesquebec.ca/fr/

On Tue, Mar 7, 2017 at 9:42 AM, James <james2432 at gmail.com> wrote:

> We also have to think if we are going with "good enough".... when we want
> better the work that will be doubled to make the boundaries better.
>
> On Tue, Mar 7, 2017 at 9:38 AM, Paul Ramsey <pramsey at cleverelephant.ca>
> wrote:
>
>> Municipalities are creatures of the provinces, the most likely source of
>> complete, correct municipal boundaries will be the provincial government,
>> though each municipality will generally know theirs (and sometimes disagree
>> with neighbours, hence the utility of using a provincial file if available).
>>
>> Matching of CSDs with municipal boundaries is something StatsCan will
>> attempt to achieve, but it's by no means a guarantee. If the goal is "good
>> enough", CSDs are good enough. If the goal is to reflect reality,
>> provincial data will always be preferable.
>>
>> e.g. https://catalogue.data.gov.bc.ca/dataset/municipalities
>> -legally-defined-administrative-areas-of-bc
>>
>> P
>>
>>
>> On Tue, Mar 7, 2017 at 6:31 AM, James <james2432 at gmail.com> wrote:
>>
>>> In purple/black CSD 2016, in gold Gatineau's city limits from their open
>>> data portal:
>>> http://i.imgur.com/undefined.png
>>>
>>> The CSDs do not match up with actual city bounds
>>>
>>> On Tue, Mar 7, 2017 at 9:20 AM, Bjenk Ellefsen <bjenk.ellefsen at gmail.com
>>> > wrote:
>>>
>>>> Just to make sure we are talking about the same thing: Census Divisions
>>>> are higher level and more regional boundaries. CSDs are municipal
>>>> boundaries (in OSM, level 8).  http://www.statcan.gc.ca/eng/s
>>>> ubjects/standard/sgc/2011/sgc-intro
>>>>
>>>> Can you give me an example of city limits that don't match a CSD or is
>>>> not in the SGC? Usually, the standard for municipal boundaries are the
>>>> CSDs. At least, as far as I know, this is the standard geography. When
>>>> referring to actual city limits, which geographical classification is it
>>>> referring to?
>>>>
>>>> Sorry for the questions, I am trying to understand what is the
>>>> classification used if its not the CSDs.
>>>>
>>>> On Tue, Mar 7, 2017 at 9:11 AM, James <james2432 at gmail.com> wrote:
>>>>
>>>>> Bernie, I've also noticed that StatsCan boundaries seem to be a
>>>>> generalization of an area vs the actual city limits
>>>>>
>>>>> On Tue, Mar 7, 2017 at 9:02 AM, Bernie Connors <
>>>>> berniejconnors at gmail.com> wrote:
>>>>>
>>>>>> Bjenk,
>>>>>>
>>>>>>       In NB there are issues with some census boundaries not matching
>>>>>> with our administrative boundaries. The issue I am aware of was with the
>>>>>> county boundaries. The census data that is analogous to our county
>>>>>> boundaries included some significant deviations to prevent a municipality
>>>>>> from being bisected by a county boundary. Please be careful that there is
>>>>>> not a similar issue with the CSD boundaries. NB municipal boundaries can be
>>>>>> downloaded from the GeoNB Data Catalogue For comparison to the CSD data.
>>>>>>
>>>>>> Bernie.
>>>>>>
>>>>>> Sent from my BlackBerry 10 smartphone on the Bell network.
>>>>>> *From: *Bjenk Ellefsen
>>>>>> *Sent: *Tuesday, March 7, 2017 9:51 AM
>>>>>> *To: *talk-ca at openstreetmap.org
>>>>>> *Subject: *[Talk-ca] Municipal boundaries
>>>>>>
>>>>>> Hello,
>>>>>>
>>>>>> Municipal boundaries correspond to census subdivisions (CSD). I have
>>>>>> seen that many municipalities do not have a boundary yet. Is it ok if I
>>>>>> start adding some boundaries based on CSDs? Having the boundaries is
>>>>>> important to make extractions and analysis at the municipal level.
>>>>>>
>>>>>> Bjenk
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> Talk-ca mailing list
>>>>>> Talk-ca at openstreetmap.org
>>>>>> https://lists.openstreetmap.org/listinfo/talk-ca
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>> --
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>>>>>
>>>>
>>>>
>>>
>>>
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>>
>
>
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