[Imports] Import WestCOG building footprints in south-west Connecticut

Julien Lepiller osm at lepiller.eu
Sat Aug 29 20:55:46 UTC 2020


So, it's been a week since that last message. Do you think we should
import addresses and buildings at the same time? Should we import the
buildings first and care about addresses later?

Yury, what are your thoughts about the data source quality? Do you
think it's a good idea to import from WestCOG and maybe rely on CT data
for the rest of CT? I tried playing with the data and I didn't see any
difference between drawing the buildings from scratch and having to
simplify and correct CT's data.

Thanks!

Le Sat, 22 Aug 2020 19:36:23 -0400,
Martin Machyna <machyna at gmail.com> a écrit :

> Thank Julien for pushing this forward!
> 
> yeah, I tried to get addresses from here:
> http://geodata-ctmaps.opendata.arcgis.com/datasets/bfa7da83da384c2aa809882179369dc4_0/features/305004
> and add them on top of the westCOG buildings.
> 
> The data is a big mess because it's a join_table of like 30 different
> address databases. I lost a bit of motivation there, but I could have
> a look at it again.
> 
> Martin
> 
> On Sat, Aug 22, 2020 at 2:19 PM Julien Lepiller <osm at lepiller.eu>
> wrote:
> 
> > Le Sat, 22 Aug 2020 13:30:02 -0400,
> > Yury Yatsynovich <yury.yatsynovich at gmail.com> a écrit :
> >  
> > > Hi Julien,
> > > The following communication that I've had recently with a CT
> > > official might be of interest to you:
> > >
> > >  
> >
> > Oh, great! I think we already saw this data (I tried to contact them
> > too, but never got a reply :/). From what we saw (I think it was in
> > February?) the footprints have simplification issues (see
> > https://files.slack.com/files-pri/T029HV94T-FTDGDHXTM/image.png for
> > instance) where they are too detailed, not square enough, etc. Some
> > buildings also have holes in them, when there's none in the imagery.
> >
> > So I think it's too bad to be used directly, without a lot of manual
> > effort to simplify, square and redraw the shapes. However, the
> > address data is very interesting, so maybe we could extract from
> > it? Or we could use a separate dataset if they have addresses
> > separately.
> >
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> >  




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