On Thu, Oct 20, 2011 at 9:10 AM, Metcalf, Calvin (DOT) <calvin.metc...@state.ma.us> wrote: > If nobody objects I'll start uploading the towns from the admin8 file and > stow file
Dear Calvin, I have an objection and a suggestion. See below. > I noticed that a couple of the counties are only relations (i.e. the ways > aren't tagged admin_level=6) so no lines are going to go in there. I'm not sure I understand what you say here. Are you saying that some admin areas are only tagged on the relations? Are you also saying you object to such tagging only on the relations? Or are you saying that you won't upload into areas that are tagged only on the relations? > With this done all borders in Mass will be represented by a tagged way, if > that looks good I can put in the new counties and state boarder files that > don't include any overlaps. I believe that this thread (perhaps the other threads on the same topic) has established that MA borders are sub-optimal. Those borders are from various imported sources. Those imported sources disagree with each other as shown by crossings and parallel borders where they should be a shared line. My objection is this. Importing state wide data from yet another source without addressing the existing border weaknesses will make the MA border condition worse, not better. My suggestion is this. Please consider _editing_, not _importing_, these town boundaries in a way that greatly improves MA borders. Work in very small areas at one time and touch each way individually, by hand. Reconcile the new town borders with the existing county / state borders and improve those as you go. Use a single way where inappropriate duplicates now exist, and add the way to each of the appropriate border relations. Starting with Stow, (is this the right Stow?) http://www.openstreetmap.org/?lat=42.4237&lon=-71.5119&zoom=13&layers=M you might decide that the existing town border is correct-enough, then merge the Worcester / Middlesex border to the town line where they are expected to overlap. Refer to other sources, perhaps aerial imagery, at the same time and you'll have the opportunity to fix other problems in / around Stow as well. Then do a couple of the adjacent towns as well. Adjacent towns should be easier because you'll have already sorted out one of the shared borders. Yes, this sounds like a lot of work. Yes, this is slower than just throwing the import data over the garden wall. But. Do this and show us a before and after screenshot with the beautiful, improved MA borders. Do this and provide these lists with the details of your workflow and any helpful tricks and troublesome traps. Do this and perhaps you'll have other MA mappers flocking to assist in the great MA border cleanup. You can make the MA borders and the cleanup process an example for other areas sharing the same border shortcomings. Best regards, Richard _______________________________________________ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us