Dave F. wrote: > Lester Caine wrote: >> Dave F. wrote: >>> Lester Caine wrote: >>>> But well mapped rivers don't have ways down their middle >>> Really? >>> Care to expand on that please? >> >> MOST rivers are now being mapped fully and so are areas rather than a >> line with some arbitrary width. So there is no 'way' corresponding to >> some arbitrary mid point to the river ... > > I contest your assertation that 'most' is accurate, but that's another > point.
Where new mapping is being carried out ... most of that work is to provide river data in the now prefered format .... > But... > http://wiki.openstreetmap.org/wiki/Tag:waterway%3Driverbank > > There should be a way to indicate both the direction of flow, bit also > the route, where applicable, for boat routes. To show that it goes > through a lock rather than a weir for example. > & also for boundaries, of course. The way associated with a river provides the direction of flow only. There is no requirement that it should follow a boat route, or boundary. THOSE need to be mapped with additional ways, since the river details can not be assumed to be correct in either case? >>>> Even more important, we need a way to maintain historic information >>>> such as '1995 boundary' where later boundaries are different. >>> Why do we need to do that? >>> I delete out of date data. >>> Please explain why you think we should keep it? >> >> Just because YOU are not using the data does not entitle you to delete >> it! > And because you might want to use it doesn't mean it should be kept in > the database of a *current* map. > > I wasn't suggesting that because I do something a certain way it was > correct, just that I do it. > > However, is this being done by others? I've yet to come across it in use. > Do you have a link to a wiki page? http://wiki.openstreetmap.org/wiki/Proposed_features/key:date http://wiki.openstreetmap.org/wiki/Key:start_date ( and end_date ) http://wiki.openstreetmap.org/wiki/Proposed_features/Timeline_tags >> The whole reason *I* am interested in OSM is as a base for documenting >> my genealogical data. Being able to check a location at some point in >> time is important and while many of the attempts to get time data >> properly tagged have not been accepted, simple information like >> 'constructed=1980' would at least allow maps to be rendered to provide >> a view in a particular year. ONCE that is possible, then the related >> boundary information is also important. >> >>> If a footpath gets moved do you think I should still show a way & mark >>> it as 'this is where it used to go'? >> 'closed=2007' makes perfect sense to me. People then coming back to an >> area that they walked 30 years ago would then see why they can't >> follow the same route today? > > How far back do you suggest going? AFAIS, we are up to our necks in > current data let alone trawling through OoD data. > I live in a old Roman city, if I had the patience & time to go back that > far, the database would be unreadable & unusable with so much info > layered on top of each other. The current unorganized tangle of data would only be improved by adding the correct start_date ( and end_date ) tags to that data. In the UK we are fortunate to have fairly accurate data on when roads were created, and features added. 'start_date' should be a part of every historic object placed on the map. The problem is that the FORMAT for that simple data differs from tag to tag, rather than providing a single standard that higher level tools can use :( >> Just like 'micromapping', historic information may not be of interest >> to everybody, but moving forward, why would you NOT want to maintain >> data that has already been mapped. We just need agreement on how it is >> maintained - since the 'history' of object edits is simply no >> substitute for mapping historic data. -- 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// Firebird - http://www.firebirdsql.org/index.php _______________________________________________ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb