I'm from rural Alberta close to Lloydminster. The building import is something that interests me and would be useful in my area but I haven't been very actively mapping over the last year or two. Hopefully there are Alberta mappers on here who are much more active than I have been.
Darren Wiebe On Tue, Mar 26, 2019 at 2:04 PM John Whelan <jwhelan0...@gmail.com> wrote: > I think my concerns are to do with the "black box" approach. Knowing your > background I trust your work but others might not. > > On a technical side I get the impression that cites with buildings that > are close to each other are problematical. I assume that small locations > with a population of say under 125,000 this is an insignificant problem? > > The other issue is I'd like to either see buy in from Nate or at least > some Toronto mappers to get an indication that something will happen at the > end of the day as it is a fair chunk of Daniel's time to work out how do > the preprocessing. > > I think some BC mappers expressed some doubts as well so perhaps they > would like to think about if they are happy or would prefer BC to be > outside of the import project and express their views. > > Out of interest if it does move ahead are we including the Microsoft data > for areas where we do not have data from Stats Canada? If so we will need > to amend the project plan. > > My personal view is realistically I think having building information even > if its a meter or two out is better than not having the building outlines. > > What would be nice is if we could have some indication from places such as > Manitoba, Alberta, Saskatchewan, Quebec excluding Montreal, Ontario > excluding Toronto and the other provinces and territories whether they are > happy with importing the buildings either from Stats or Microsoft. > > I seem to recall Keith is in Manitoba, so any views other than it wasn't > present in the first release from Stats? > > Note to Alessandro this is just background stuff. > > Thanks > > Cheerio John > > Begin Daniel wrote on 2019-03-26 3:29 PM: > > Jarek, > The area you proposed in quite interesting and will force me to look further > at buildings with sharing edges, a concern Pierre also had. I'll be back soon > with your area processed. > Daniel > > -----Original Message----- > From: Begin Daniel [mailto:jfd...@hotmail.com <jfd...@hotmail.com>] > Sent: Tuesday, March 26, 2019 14:34 > To: Jarek Piórkowski; talk-ca@openstreetmap.org > Subject: Re: [Talk-ca] Building Import > > Jarek, > Since it is a one-time process, I expect to be able to process the files if > the community feels comfortable with it. In the meantime, people are welcome > to send me the bounding box of an area they would like to examine. > > Daniel > > -----Original Message----- > From: Jarek Piórkowski [mailto:ja...@piorkowski.ca <ja...@piorkowski.ca>] > Sent: Tuesday, March 26, 2019 13:46 > To: Begin Daniel; talk-ca@openstreetmap.org > Subject: Re: [Talk-ca] Building Import > > On Tue, 26 Mar 2019 at 13:10, Begin Daniel <jfd...@hotmail.com> > <jfd...@hotmail.com> wrote: > > There is actually no standard “code” available since I use FME > (www.safe.com). It is a proprietary ETL application and all operations are > done using “transformers” (https://www.safe.com/transformers/). I can provide > you with the workbench I developed (a bunch of linked transformers) but you > need a license to run it. This is why I tried to describe the operations I > run on the data in the wiki. > > As you did, people may send me coordinates (bounding box) of an area they > know well. I’ll process the area and send the results back in OSM format. > Please, be reasonable on the amount of data to process ;-) > > Thanks Daniel. Let me know how it looks then! > > Coming from an open-source background, the process is unusual to me, > and I have questions about scalability - will you be able to process > and provide updated data files for all of Canada then? - but if others > are comfortable with it then I won't object. > > Some general thoughts regarding tooling as raised upthread: > > I was initially excited to see building footprints data as they help > two quite distinct purposes: > > 1. they provide a mostly-automatic source of geometries for the > millions of single-family houses that wouldn't be mapped in the next > decade otherwise > > 2. they might provide a corrected and fairly accurate source of > geometries in heavily-built-up areas, where GPS signal is not that > reliable and it can be really difficult to get sufficiently accurate > geometries from imagery, whether because it's not sufficiently > high-resolution, two sets of imagery with conflicting offsets (Bing > and Esri are the two best sets in Toronto, and they're off by about > 1-2 m on north-south axis from each other - that's not something I can > check with a consumer-grade GPS so I'm left guessing as to which is > true), or non-vertical imagery (I can count the floors on supposedly > top-down imagery in some cases). > > >From what I saw, imports in the GTHA initially focused on the first > case, and I think the Tasking Manager setup was mostly sufficient for > those - where there is nothing currently on the map, or a few simple > 2D geometries, a 4 sq km area can feasibly be done in under an hour. > > However, as raised by others, I would really want the working squares > in Old Toronto for example to be no more than 500 m x 500 m, or no > more than 1 km x 1 km in St. Catharines. I would _love_ to have the > geometries to manually compare and adjust the 3D buildings already > existing in the area, but it will be much slower. > > --Jarek > _______________________________________________ > Talk-ca mailing > listTalk-ca@openstreetmap.orghttps://lists.openstreetmap.org/listinfo/talk-ca > _______________________________________________ > Talk-ca mailing > listTalk-ca@openstreetmap.orghttps://lists.openstreetmap.org/listinfo/talk-ca > > > -- > Sent from Postbox > <https://www.postbox-inc.com/?utm_source=email&utm_medium=siglink&utm_campaign=reach> > _______________________________________________ > Talk-ca mailing list > Talk-ca@openstreetmap.org > https://lists.openstreetmap.org/listinfo/talk-ca >
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