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

Sat Aug 22 17:30:02 UTC 2020

Hi Julien,
The following communication that I've had recently with a CT official might
be of interest to you:

*********

Hi Yury,

At this point, yes, I think that’s correct. Obviously, we’d like if you
cite the state, but we don’t have set guidelines for that. I forwarded the
other issue with downloading data and will let you know what I hear.
Hide quoted text

Thanks,

Scott

*From:* Yury Yatsynovich <yury.yatsynovich at gmail.com>
*Sent:* Monday, August 3, 2020 8:53 AM
*To:* Gaul, Scott <Scott.Gaul at ct.gov>
*Subject:* Re: Request for permission to import data into OpenStreetMap

Thank you,  Scott!

The above mentioned terms describe mostly (lack of) liabilities of the data
provider, but don't mention any constraints on who and how can use the
data. Does it mean that there are no such constraints? There is also no
attribution requirement -- does it mean that I'm not required to cite the
source of the data?

With best regards,

On Mon, Aug 3, 2020, 7:42 AM Gaul, Scott <Scott.Gaul at ct.gov> wrote:

Hi Yury,

Thanks for asking – you can use the terms of use for the CT open data
portal, here: https://data.ct.gov/terms. That should also cover the GIS
portal. Let us know any questions.

Thanks,

Scott

*From:* Yury Yatsynovich <yury.yatsynovich at gmail.com>
*Sent:* Friday, July 31, 2020 3:57 PM
*To:* Gaul, Scott <Scott.Gaul at ct.gov>
*Subject:* Request for permission to import data into OpenStreetMap

Hi Scott!

Are there any constraints on who and how is allowed to use the data posted
on http://geodata-ctmaps.opendata.arcgis.com
<https://gcc02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fgeodata-ctmaps.opendata.arcgis.com%2F&data=01%7C01%7CScott.Gaul%40ct.gov%7C7d7679549bd943e31e6f08d837ac29e1%7C118b7cfaa3dd48b9b02631ff69bb738b%7C0&sdata=PYF2JL9cVk0JZ50ndaEao7mH9iaA%2BGGlsKjsmTkO8is%3D&reserved=0>
?

I'm asking this because I'm interested in importing the data on CT
buildings with addresses into OpenStreetMap (OSM) -- to do so I need to
make sure that the imported data's license is compatible with OSM.

With kind regards,

OSM contributor,

--

Yury Yatsynovich

On Sat, Aug 22, 2020, 1:17 PM Julien Lepiller <osm at lepiller.eu> wrote:

> Hi!
>
> With other contributors in Connecticut, we would like to import
> building footprints. We have evaluated different data sources, and
> concluded that no Connecticut-wide sources were usable without a lot of
> manual work to fix building geometry.
>
> We found that the WestCOG has very accurate building footprint data on
> its territory (south west Connecticut), available online and with a
> compatible license (CC0):
> http://data.westcog.org:8080/GIS_data/Buildings.gdb.zip
> That's 513,141 buildings, and 296,423 building parts in some of them,
> that cover this territory:
>
> https://westcog.org/wp-content/uploads/2015/08/WestCOG_Locus_Map-e1439920850177-790x1024.jpg
>
> Other COGs unfortunately don't share this data online. We hope that a
> successful import could be a convincing argument for other COGs to open
> their data.
>
> We have documented our current plan at
> https://wiki.openstreetmap.org/wiki/Connecticut/Western_COG_Building_Import
> on the wiki.
>
> We have contacted local mappers of this part of
> Connecticut (we are based in and around New Haven, not is south-west
> Connecticut), with no negative feedback and 2-3 positive responses. We
> have created a process to convert the data from WestCOG to OSM tags and
> files that can easily be loaded in JOSM.
>
> We have never done an import before, so we'd appreciate any advice on
> how to properly do the import. From our reading the wiki, we should use
> a separate user to import the data. Is that one shared user for the
> import, or one user for each person importing data?
>
> We have identified potential issues with this import: roads and
> waterways come from an old import and might very well cross the
> buildings we'd like to import. For now, we have a task on the osmus
> task manager to try and correct road geometry (currently finished at
> 50%) that covers Fairfield County (WestCOG is a part of Fairfield
> county): https://tasks.openstreetmap.us/project/193. This is not going
> very fast, so we'd like to start the import even though we haven't
> finished the tasks. We plan to fix road and water issues as we
> encounter them instead, while encouraging people to go and fix them
> independently from our import.
>
> WestCOG currently has almost no building mapped, but obviously we plan
> to keep existing buildings and only import buildings that are not yet
> mapped.
>
> What is a good way to split this import? Is there a good size per
> changeset that you could recommend?
>
> Thanks for your help!
>
> Julien
>
> _______________________________________________
> Imports mailing list
> Imports at openstreetmap.org
> https://lists.openstreetmap.org/listinfo/imports
>
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