[OHM] OHM Hangout - 18 Dec, 8am PT US / 4pm London

[SK53]

HI Lester,

Many of the use cases for OHM feature data which has never appeared, and
will never appear in OSM. OHM is not a historical repository for OSM data *per
se*: at least not as currently envisaged and supported.

Regards,

Jerry

On 18 December 2014 at 14:06, Lester Caine <lester at lsces.co.uk> wrote:
>
> On 18/12/14 12:58, SK53 wrote:
> > Although OHM uses the OSM technology stack and most of us are OSMers, it
> > is functionally & organisationally (not that it has much of a formal
> > organisation) independent from OSM, and the OSMF.
> >
> > So far in discussions over the past year I think our approach is
> > slightly different from OSM
>
> OSM is providing an ideal base to build on. With all of the historic
> mapping that is now available as a background to the data set, and the
> slowly growing inclusion of the correct tagging of historic elements
> like start_date and end_date. Even the change-log history is now
> accessible as another time axis for things like changes of names and the
> like going forward, but that now needs augmenting with the previous
> changes.
>
> The tools that need improving are those which allow secondary layers of
> data to be merged with the main database. I see little point trying to
> completely mirror a second copy of the master data which is so key as a
> base. It is not so easy to add additional layers though such as
> spreadsheets of population figures or many of the other geographically
> related data sets. I view cross references to the likes of geonames and
> wikipedia falling into this area, since it also allows the natural
> addition of a time related filter. Tracking the evolution of a locations
> TZ settings can be handled as a historic access to the geonames data, or
> similar database.
>
> While material that now has an end_date is purged from the main
> database, it's content needs to be maintained in a secondary layer onto
> which things like the now lost Roman roads, railway lines and other
> structures can be mapped in exactly the same way as OSM currently works.
> SO a mirror only needs to maintain material that has dropped out of
> interest to current day mappers? But a substantial amount of that data
> surfaces in the current day maps?
>
> --
> Lester Caine - G8HFL
> -----------------------------
> Contact - http://lsces.co.uk/wiki/?page=contact
> L.S.Caine Electronic Services - http://lsces.co.uk
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> Model Engineers Digital Workshop - http://medw.co.uk
> Rainbow Digital Media - http://rainbowdigitalmedia.co.uk
>
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