[Talk-ca] Crowdsourcing buildings with Statistics Canada

[john whelan]

On the clean up side I pulled in osmconvert64 ontario.osm
-b=-76,45.0,-75.7,45.5 -o=ottawa1.osm  so a small chunk of ottawa.  JOSM
validation gave 50 errors and 3,913 warnings.  The ontario map was fairly
recent like yesterday I think. The file is here:

http://www.jatws.org/johnw/ottawa1.zip if any one would like to load it
into JOSM and perhaps clean a few errors up.  I don't seem to be able to
split off the entire city but I can do some chunks if anyone is
interested.  Ideally find the error then down load a fresh tiny bit using
slippy map, correct and upload.

Cheerio John

On 6 August 2016 at 14:12, john whelan <jwhelan0112 at gmail.com> wrote:

> ​I understand the current intent is data.gc.ca
>
> There is actually a lot of postcode data in Ottawa adhresses as it stands
> especially for commercial buildings.  Don't hold your breath for Canada
> Post and postcodes.
>
> Some attributes they would like at the moment I can't see how a mapper
> would map them from physically looking at the building.
>
> If nothing else it should clean up the map.  For that reason it would be
> nice to be able to pull chunks into JOSM and go over it looking for obvious
> errors and spelling mistakes in tags.  Maperitive has the ability to
> extract the tags and export them in spreadsheet format which is good for
> this sort of thing but you need a source to feed it.​
>
>
> Cheerio John
>
> On 6 August 2016 at 12:38, Stewart C. Russell <scruss at gmail.com> wrote:
>
>> Hi John - some great points here.
>>
>> > My understanding is currently he’s looking getting hold of the City of
>> > Ottawa building outline data and making it available to OpenStreetMap
>> > without the current license restriction.
>>
>> This would be wonderful. It would be ideal if the data could be placed
>> on data.gc.ca and use the OGL-CA v2 licence. OSM can't use any data
>> under the City of Ottawa Open Data - Terms of use
>> <http://ottawa.ca/en/mobile-apps-and-open-data/open-data-terms-use>. I
>> also have my doubts about the acceptability of the Statistics Canada
>> Open Licence Agreement <http://www.statcan.gc.ca/eng/reference/licence>.
>> OGL-CA v2, though, we know to be acceptable.
>>
>> Also, if there were to be an import, we *must* follow the
>> Import/Guidelines
>> <https://wiki.openstreetmap.org/wiki/Import/Guidelines> or risk having
>> any new imports deleted. The recent LA building import provides a decent
>> template, but there are no imports without the Data Working Group having
>> knowledge of it.
>>
>> [** Bjenk: if all this seems gibberish, please ping me off-list, and I'd
>> be happy to have a chat. Despite my previous flippant comments, I think
>> this is a great project.]
>>
>> To some more of John's points:
>>
>> > He’s also asking for the building outline to be tagged with the address
>> > including postcode.  Which is interesting as currently each node of
>> > store within a building might have part of the address.
>>
>> For sure. I looked at the City of Ottawa data, and getting it to mesh
>> with existing address points and ranges in OSM is going to be challenging:
>>
>> * fixing street naming to meet OSM standards (so Ottawa's 991 CARLING
>> AVE would have to become addr:housenumber=991 and addr:street=Carling
>> Avenue). Not impossible, but would need some manual oversight
>>
>> * Inconsistent application of French to some street names, English to
>> others, and no obvious metadata to distinguish language
>>
>> * some buildings in mixed-use neighbourhoods will have multiple address
>> points, all containing the same address (eg St Stephen's on Parkdale Ave
>> has three 579 Parkdale Ave nodes)
>>
>> * some buildings just plain don't have address points nearby (like the
>> Agri-Food Canada Building on Carling Ave)
>>
>> * rationalizing address points with existing address ranges.
>>
>> And then there's the postal code problem. If Stat Canada can bring us a
>> licence-compatible data set of full codes that Canada Post *won't* try
>> to sue us over, that would be glorious. I'm not sure we could get enough
>> traction with the general Canadian public to do the "Free the Postcode"
>> initiative like in the UK to make this useful as a crowdsourcing effort.
>>
>> > … One problem I see arising is a new mapper mapping to the
>> > Stats Canada guide lines using iD changes one or more existing tags.  I
>> > do a fair amount of validation in HOT and some newer mappers either
>> > completely ignore or misunderstand the instructions.
>>
>> Yes, this can be a problem with newer mappers. There would need to be a
>> careful data quality metric, but also an understanding that unpaid,
>> crowdsourced data may always have errors.
>>
>> Big project. Genuine opportunities for learning and value on all sides.
>>
>> cheers,
>>  Stewart
>>
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>
>
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