[OHM] temporal data in the OHM sandbox

[Erik Johansson]

Hi Marcus.

I don't know how other people use it, and I've not uploaded my data
because of many small problems with historic mapping. But I have a
handfull of historic buildings in Stockholm that I will upload
sometime in the future.

For the buildings I use
start_date=1790
end_date=1810

http://wiki.openstreetmap.org/wiki/Key:start_date

I also use free form tagging, these need to be more formal.
 note="just gone from map"
 note="demolished"
 note="burned down"

I do not map changes to the buildings, e.g.
* reconstructions and additions.
* church => night club
* relocations

I've tried to map name changes, But it's clunky.
 name:1790="Frömans krog"

I find it hard to verify facts, I should have added source on every
feature I mapped, I've tried source=, but these tags are sometimes out
of sync with the data.
 source="map xx from 1624"
 source:url=*

It will probably take a while before I upload/share my meager data
collection, mostly because of it being hard work with all sources,
projections and unexplained peculiarities.

I have no renderers for the data yet, except some manual one year
snapshot with either JOSM or postgres + openlayers.

On Wed, May 15, 2013 at 6:50 PM, Marcus Koenig <einschmelzer at hotmail.com> wrote:
> Hi,
>
> I'm very interested in the OHM project and I would like to contribute data
> for Mainz, Germany. In the long run I would like to create a map of the city
> before the destructions during WW2, but also of earlier periods. I have had
> a look at the OHM Sandbox, but I couldn't find out where the time dimension
> comes in. How do you tag and display temporal information? The map would
> have to change with time settings - eventually? I'd really appreciate if
> anyone could give me a short insight into the current state of the project.
>
> Best regards
>
> Marcus König
>
>
> _______________________________________________
> Historic mailing list
> Historic at openstreetmap.org
> http://lists.openstreetmap.org/listinfo/historic
>



-- 
/emj