[Imports] Importing official Buildings/Addresses in Louisville KY

[Sander Deryckere]

Hi,

I think a more elaborate documentation is needed before it can actually be
judged.

The workflow is unknown. What tools will you use to split up the task, what
tools will you use to detect conflicts, how will you handle conflicts (f.e.
the same address on a different position when you compare OSM with city
data)...

Next to that, you also need to do some research about data quality. The
building outline precision is hard to check with amateur hardware, thus
only a quick check is useful there. However, address databases may contain
many different logical mistakes. In our Flemish dataset, I've encountered
housenumbers being assigned to the wrong street (sometimes a neighbouring
street, sometimes a street with a similar name), numbers where no building
exists, new houses that were not yet numbered, spelling mistakes in
streetnames, overlapping housenumbers that should go on different houses...
You should do qualitative research on an area you know, or that's well
mapped in OSM already. Quantitative research is hard here, because there's
no data to compare it too.

As a final note, you must also think about updatability. Once the data is
in, people will build on it, and you can't just swipe it out and replace
with a newer dataset once that's released. So if you import a 2012 dataset
now, what will you do when the next dataset comes out? You say that the
housenumbers are updated daily, but how will you handle that? As imports
require a smaller community than normal mapping, updatability is quite
important when doing an import, since there's about nobody left to do the
job.

Updatability can be achieved by adding an id to the imported objects (that
id must be permanent in the source DB), but it's also possible without id
when you develop algorithms to compare OSM data with the official data.

Thanks for working on this,
Sander

2015-01-28 20:55 GMT+01:00 Michael Schnuerle <mschnuerle at codeforamerica.org>
:

>  Hi all,
>
> Louisville KY's Code for America brigade has volunteered to help the American
> Printing House for the Blind work with the OSM community to import the
> building footprint and address data properly.
>
> I'm coordinating the effort and wanted to reach out to this list, per the
> Import Guildelines.  I've created some OSM Wiki pages as a start to compile
> all the info publicly.
>
> Main Import page:
>
> https://wiki.openstreetmap.org/wiki/Louisville,_Kentucky/Building_Outlines_Import
>
> Added to this list:
> https://wiki.openstreetmap.org/wiki/Import/Catalogue
>
> We've got a number of members who have made some OSM edits over the last
> few years.  We are reaching out to more active local OSM editors too.  If
> there is anyone on this list who is an active editor locally we'd love to
> have your support and help!
>
> You can read more about the project here on our forum:
>
> http://www.civicdataalliance.org/forum/?place=msg%2Fcivicdataalliance%2FJDkgh-uc2so%2FFoQZuypzZZEJ
>
> I'd like to ask for help with making sure we do everything correctly, and
> next steps.  We want to follow in the footsteps of NYC, LA, Chicago and
> NOLA who have all recently done something similar.
>
> We have a technically competent team of volunteers (programmers, mappers,
> GIS, coders), and our short term goal is to get things setup for a
> hackathon we are hosting Feb 21 called CodeAcross.  At CodeAcross we'll
> have a day to really get people focused on loading the data in chunks into
> OSM.
>
> I'm also sending this to the imports-us@ list.  If I should focus my
> communications there just let me know.
>
> Thanks,
>
> --
>
>  *Michael Schnuerle* | Code for America Louisville Brigade Captain
> *e* mschnuerle at codeforamerica.org | @CivicDataAlly
> <http://www.twitter.com/CivicDataAlly>
>
> CivicDataAlliance.org <http://www.civicdataalliance.org/> | Open Data
> Portal <http://data.civicdataalliance.org>
>
>
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