Hi everyone,
Thanks John for pointing out the new dataset!
Steve, John just indicated that there is this new dataset available now.
I am confident, that after our discussion on importing building
footprints in Canada, the OSMappers who want to go forward with it, will
provide the information on the import plan/wiki.
You can download the Microsoft file at the site indicated by John. The
license information can be found there as well (as mentioned by James it
is ODbL. It is much more extensive than the Open Building Database
release by StatCan (> 12 million buildings vs. 4.4 million buildings).
So, I got interested and I had a look at the data for Montreal:
https://imgur.com/a/PwuZ3Q5
I chose an area where OSM data existed. As you can see OSM hand-drawn
buildings from Bing imagery are nicely drawn and separated.
When you compare the OSM data to the Open Building Database (OBD) data
from StatCan (brown in my images) which draws on the données ouvertes de
Ville de Montréal (extracted from photogrammetric imagery) you can see
that the OBD data is somehow more precise than the OSM/Bing data, but
the huge draw back is that the OBD data only captures the building
outlines of attached/terraced buildings, i.e. of building blocks without
separating single buildings (as already mentioned by me in a separated
e-mail to the list - this is why we will have to do some pre-processing
of the data).
When you then compare this data set to the Microsoft data set (pink in
my images), you see that their deep neural network approach fails in
areas with terraced houses big time. Same goes for the the city centre
of Montreal (not shown in my images).
So, the Microsoft data set might work for areas with single homes and
that would be helpful to fill in the blanks in remote areas, but for
areas where we have data from the ODB, importing from the ODB might be
better. However, caution has to be taken with ODB as well, as every
municipality that contributed data might have contributed a different
data source, where the quality should be check each time.
Just my two cents here.
Tim
On 2019-03-02 17:40, john whelan wrote:
Why are you planning to import it?
Cheerio John
On Sat, Mar 2, 2019, 5:26 PM OSM Volunteer stevea,
<[email protected] <mailto:[email protected]>> wrote:
A responsible complement to this would be a link to license
information, a wiki page about these data, and perhaps an Import
Plan should those data actually be asserted to be worthy of being
responsibly imported into OSM.
SteveA
California
> On Mar 2, 2019, at 2:17 PM, john whelan <[email protected]
<mailto:[email protected]>> wrote:
>
> https://github.com/Microsoft/CanadianBuildingFootprints
>
> So now there are two Open Data sources for building outlines in
Canada.
>
> Cheerio John
> _______________________________________________
> Talk-ca mailing list
> [email protected] <mailto:[email protected]>
> https://lists.openstreetmap.org/listinfo/talk-ca
_______________________________________________
Talk-ca mailing list
[email protected]
https://lists.openstreetmap.org/listinfo/talk-ca
On 2019-03-02 17:49, James wrote:
M$ released data as ODbL sooooo pretty sure license is compatible
On Sat., Mar. 2, 2019, 5:27 p.m. OSM Volunteer stevea,
<[email protected] <mailto:[email protected]>> wrote:
A responsible complement to this would be a link to license
information, a wiki page about these data, and perhaps an Import
Plan should those data actually be asserted to be worthy of being
responsibly imported into OSM.
SteveA
California
> On Mar 2, 2019, at 2:17 PM, john whelan <[email protected]
<mailto:[email protected]>> wrote:
>
> https://github.com/Microsoft/CanadianBuildingFootprints
>
> So now there are two Open Data sources for building outlines in
Canada.
>
> Cheerio John
> _______________________________________________
> Talk-ca mailing list
> [email protected] <mailto:[email protected]>
> https://lists.openstreetmap.org/listinfo/talk-ca
_______________________________________________
Talk-ca mailing list
[email protected] <mailto:[email protected]>
https://lists.openstreetmap.org/listinfo/talk-ca
_______________________________________________
Talk-ca mailing list
[email protected]
https://lists.openstreetmap.org/listinfo/talk-ca
On 2019-03-02 17:49, James wrote:
M$ released data as ODbL sooooo pretty sure license is compatible
On Sat., Mar. 2, 2019, 5:27 p.m. OSM Volunteer stevea,
<[email protected] <mailto:[email protected]>> wrote:
A responsible complement to this would be a link to license
information, a wiki page about these data, and perhaps an Import
Plan should those data actually be asserted to be worthy of being
responsibly imported into OSM.
SteveA
California
> On Mar 2, 2019, at 2:17 PM, john whelan <[email protected]
<mailto:[email protected]>> wrote:
>
> https://github.com/Microsoft/CanadianBuildingFootprints
>
> So now there are two Open Data sources for building outlines in
Canada.
>
> Cheerio John
> _______________________________________________
> Talk-ca mailing list
> [email protected] <mailto:[email protected]>
> https://lists.openstreetmap.org/listinfo/talk-ca
_______________________________________________
Talk-ca mailing list
[email protected] <mailto:[email protected]>
https://lists.openstreetmap.org/listinfo/talk-ca
_______________________________________________
Talk-ca mailing list
[email protected]
https://lists.openstreetmap.org/listinfo/talk-ca
_______________________________________________
Talk-ca mailing list
[email protected]
https://lists.openstreetmap.org/listinfo/talk-ca
