[OHM] OGL & OHM

Tue May 26 16:30:12 UTC 2015

*As far as I know there is no license for OHM, the copyright
page http://www.openhistoricalmap.org/copyright
<http://www.openhistoricalmap.org/copyright> is not even mention OHM. Some
pages(for example the about page) is also crediting OSM, why? are imports
made?*

: )

The main reason the ohm.org/copyright page and attributions don't mention
OHM is a result of us not updating those pages and pushing to the live
site. That's it. There's no conscious decision / thinking beyond that. We
should do this, but we just need someone to take the time. Some OSM peeps
have even asked us to clean that up in the past.

CC0 is compelling for a variety of reasons, but as Jerry points out, that
would make lifting data from OSM more difficult. The reason the extant OSM
dataset is so interesting is that there's already a huge amount of
historical information embedded in the work there. Key example here is
city-stripping. For my mapping of old Seattle, I even lifted the current
city street grid from Seattle to serve as a guide for historic street
locations. It wouldn't be that hard to have duplicated that information,
but that's a pretty small scale. If I wanted to map Seattle in 1920 instead
of 1878, there would be a huuuuge amount of helpful data already in OSM.

So, it sounds like we should:
- Updated the copyright information on the website
- Start logging the use cases that we have, as Susanna suggests
  -- I've created a very skeleton set of pages to start documenting this
discussion:
      --- http://wiki.openstreetmap.org/wiki/OHM/Copyright
      --- http://wiki.openstreetmap.org/wiki/OHM/Contributors

I don't think we have any immediate answers, but Susanna's suggestion of
identifying issues and working them as we go along seems to be good for now.

One key point... and not to thread-jack, but I believe it'll be hard to
have any real copyrights until we create a formal organization/entity
around OHM. Otherwise, what/who is really the copyright holder?

- Jeff

On Tue, May 26, 2015 at 4:42 AM, Albin Larsson <albin.post at gmail.com> wrote:

> Jeff, yesthat's the page I'm referring to. Also the OSM copyright page
> has a list of some sources. We are not discussion the Open Game License,
> but the Open Government Licence - Canada(Maby the same as the UK version?)?
>
> I'm not saying that OGL and ODBL are incompatible, I'm saying that OHM and
> OGL are incompatible. As far as I know there is no license for OHM, the
> copyright page http://www.openhistoricalmap.org/copyright is not even
> mention OHM. Some pages(for example the about page) is also crediting OSM,
> why? are imports made? We have no good way to give attribution to all
> OGL/(other license) sources nor have the people who want to reuse OHM data.
>
> Much of the data extracted from map scans and such images could be
> licensed under a PD like license. For example in Sweden all data extracted
> from maps that are 15 years old or older is public domain. Not sure about
> scans and images of maps. The imagery provided by NLS that we/OSM uses is
> for example licensed under a non ODBL compilable license but we are allowed
> to relicense the extracted data.
>
> In my personal opinion I think that data such as the one that exists in
> OHM should be licensed CC0, allowing people to reuse the data and by them
> self use it with other licensed data if they need.
>
> //
> Albin
>
> 2015-05-26 10:38 GMT+02:00 Lester Caine <lester at lsces.co.uk>:
>
>> On 26/05/15 07:44, Susanna Ånäs wrote:
>> > I am in favour or creating a future-compatible environment, but we
>> > should collect data about where the problems are.
>> >
>> > Source attribution should ideally not be tied to the issue of copyright.
>> > I think it should be a requirement per se in this environment where the
>> > usefulness of the data stems from knowing the provenance of the data.
>> > That information should go down to feature level.
>>
>> Current data is at least traceable to on the ground objects, so someone
>> claiming to 'own' the data has to have a good reason for it not being in
>> the public domain already? Adding historic material such as when certain
>> features were added which is not verifiable physically is starting to
>> digress into that area. When doing verification of genealogical data,
>> the sources of facts can be identified and the copyright on that source
>> may affect it's usability. In my own case, the location is an important
>> part of that data, and this is where the development of an area provides
>> a cross reference to accuracy of the source data. This is where
>> personally I'm looking for 'open source' access to map scans rather than
>> paid for services as we have with much genealogical data today.
>>
>> The ideal situation would be a database of source material that can be
>> used freely and attribution/provenance would simply be a reference to
>> entry in that database?
>>
>> --
>> Lester Caine - G8HFL
>> -----------------------------
>> Contact - http://lsces.co.uk/wiki/?page=contact
>> L.S.Caine Electronic Services - http://lsces.co.uk
>> EnquirySolve - http://enquirysolve.com/
>> Model Engineers Digital Workshop - http://medw.co.uk
>> Rainbow Digital Media - http://rainbowdigitalmedia.co.uk
>>
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-- 
Jeff Meyer
Global World History Atlas
www.gwhat.org
jeff at gwhat.org
206-676-2347

OpenStreetMap: Mapping with a Human Touch
osm: Open Historical Map (OHM)
<http://wiki.openstreetmap.org/wiki/Open_Historical_Map> / my OSM user page
<http://www.openstreetmap.org/user/jeffmeyer>
t: @GWHAThistory <https://twitter.com/GWHAThistory> / @OpenHistMap
f: GWHAThistory <https://www.facebook.com/GWHAThistory>
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