On 29/08/15 08:50, Mateusz Konieczny wrote: >> In OSM we do that by tagging the small elements properly. Deletion is >> > vandalism. No smiley.
> And in case of elements no longer present correct tagging is a complete > lack of tagging, therefore deleting is perfectly OK. The current situation is quite simple ... one view of the data is that only currently visible data will be displayed and to make life easy any well documented history is now simply scrap. The fact that people are also documenting the future developments in the database and that this needs to be hidden until it becomes valid is no different to simply hiding historic material. That there are a proportion of users who would like access to the very data that others think should be scrapped is a simple fact. So we need two versions of the database. One with only 'physical precedence' elements only, and a second which simply allows a view at different points in time. At the current time the OHM is of no use for the second database, so we need to create another view of the main database which provides the very data that some people think has no place in a map. We currently have a growing catalogue of historic mapping sources, and this area is just as useful if it an be made available via essentially the same interface as a 'today' version of the map, and 'tomorrow' showing a hypothetical new road and rail links is little different to 'yesterday' where we actually have factual data already correctly documented. OHM provides a platform to document more speculative historic material, but that needs current material to provide a background. Just as we can maintain our own rendering of data such as a 'UK' map, there is nothing stopping a different view of the base data to provide that map as long as we have a mechanism in place to maintain access to that data for those who in many cases have created the data in the first place! The current interface can be used in different ways to achieve these ends, so 'delete' invalid data, but tagging an end_date should be normal practice for objects that have evolved beyond original use. -- 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 _______________________________________________ talk mailing list [email protected] https://lists.openstreetmap.org/listinfo/talk
