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 EnquirySolve - http://enquirysolve.com/ Model Engineers Digital Workshop - http://medw.co.uk Rainbow Digital Media - http://rainbowdigitalmedia.co.uk _______________________________________________ Historic mailing list [email protected] https://lists.openstreetmap.org/listinfo/historic
