2012/9/28 Lester Caine <les...@lsces.co.uk>: > I did put my hand up for a tag which is automatically applied for those of > us who forget it ;) If I have a background layer up it automatically adds > that tag to each object. If I'm selecting stuff from another source then > that gets added. ALL of this could well be in one change set, and in fact I > may switch between bing and OS layers simply to add other details, so a > 'changeset' tag would not be suitable? But AUTOMATICALLY adding that data > per object would mean that it does get added :)
would you also opt for automatically removing these tags, e.g. when a imagery layer is not activated and I move a node? Are you advocating multivalue-source-lists if during the edit of an object the mapper looked at several different images? Honestly I am against a automatic mechanism to add tags, and I'd also doubt that these tags would improve our data quality. I see a huge overhead for really little benefit. Please think about it: what is the benefit for other mappers to know that you traced over imagery provider A's imagery and not that of B? Either you think it is correct or you don't and you will improve it. In rare cases it might help you to know whether this is based on outdated sources, but more often you will already see this by the date of the edit. If the original source is outdated and you know this from knowledge of the real situation you will anyway improve the data. You might be able to find areas which are based on outdated imagery to resurvey. but you can find inactive areas just as well by looking at the changes and dates of them. Even more, a comment like "tracing from bing aerial imagery" doesn't even tell you which version of their imagery you used (supposedly that around the time the edit was done, but you won't know in 2 years time which version or which date this was, especially if it isn't your "home region"). It mostly boils down to the simple question: does the mapper have local knowledge or doesn't he. Did he recently survey the area? That's not enough reason to stuff the db with mostly pointless metadata like active imagery layers in the editor during an edit. It might be an idea to add this information automatically to changesets. Btw.: does anybody on this list know if there is metadata for Bing (for a given area) available (all based on the zoomlevel of course, e.g. when did they survey, what was the resolution, where are the seems of their imagery/survey, if the data is not from them, who originally produced it, etc.) cheers, Martin _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
