On Sat, Jul 22, 2017 at 08:51:16PM +0200, Simon Poole wrote: > > > On 22.07.2017 20:28, Dave Swarthout wrote: > > ... > > > > Can you expand and clarify your comment for me? > > > > > Just as I wrote, and nothing that I invented, it is considered > > a) good practice to tag source on the changeset. Which in turn implies > that if you are using more than one third party data source and it is > not clear what you have been deriving from which source, you should be > creating separate changesets. > b) there are some limited exceptions which are typically name spaced > source keys.
The trouble is that is that it doesn't work. I always include a fairly comprehensive list of sources on changesets, but *need* individual source tags on objects. Otherwise, subsequent mappers come along with far inferior information and wipe out my many hours/days/years of careful work on the ground. I used not to use source tags on objects, but bitter experience as above shows that source tags are *necessary* to indicate: "please don't modify unless you have better information". It is usually armchair mappers who tend to run roughshod over existing carefully mapped data, often using outdated imagery. ael _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
