[Talk-us] Remapping from TIGER 2011
Yesterday I did a serious bit of remapping from TIGER 2011 data in the LA area. I wanted to see what the process would be like and how much I could get done in a reasonable amount of time. I just wrote up a quick blog post about it and would welcome any comments on the subject. http://ksmapper.blogspot.com/2012/03/remapping-using-tiger-2011.html The one user I mention in the post is blars. I'm not sure if anyone on the west coast has been holding out on remapping, waiting to see if he will accept the new terms or not. Based on a couple of different sources, I believe it is highly unlikely that he will accept. This will leave parts of the west coast looking like the San Andreas Fault has unleashed "the big one" so there is a lot of work to do. http://yosmhm.neis-one.org/?blars=&zoom=5&lat=37.96469&lon=-114.70606&layers=B0T&u=blars Toby ___ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
Re: [Talk-us] Remapping from TIGER 2011
On 3/11/2012 6:48 PM, Toby Murray wrote: I just wrote up a quick blog post about it and would welcome any comments on the subject. Last year I did all the new subdivisions in my whole county using TIGER 2010 against the original import. There were approximately 120 new subdivisions to add since then. It was all a manual process. I want to revisit Josh's handy new conflation plugin some more with this process in mind. I noticed the same thing you did - with large areas, it's easy to lose track of the boundaries of what you've already touched - particularly in mountainous areas. ___ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
Re: [Talk-us] Remapping from TIGER 2011
On Sun, Mar 11, 2012 at 7:12 PM, Mike N wrote: > On 3/11/2012 6:48 PM, Toby Murray wrote: >> >> I just wrote up a quick >> blog post about it and would welcome any comments on the subject. Great, thanks for sharing! I've added a link to the wiki: http://wiki.openstreetmap.org/wiki/Manual_conflation > Last year I did all the new subdivisions in my whole county using TIGER > 2010 against the original import. There were approximately 120 new > subdivisions to add since then. It was all a manual process. I want to > revisit Josh's handy new conflation plugin some more with this process in > mind. Do you find the new subdivisions manually as well? Just a point of clarification regarding my conflation plugin [0]; currently it is geared towards finding 1-to-1 correspondences, such as matching GNIS nodes to areas. It does not handle N-to-M correspondences like you'll have with roads, and it doesn't take care of topology issues. However there is another user working on a TIGER conflation plugin which should handle these things, but I'm not sure how far he is from having something usable. That being said, I am sorely in need of getting feedback on the design of my conflation plugin. :) -Josh [0]: http://wiki.openstreetmap.org/wiki/JOSM/Plugins/Conflation ___ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
Re: [Talk-us] Remapping from TIGER 2011
On 3/11/2012 10:28 PM, Josh Doe wrote: Do you find the new subdivisions manually as well? Yes, I just used the overlay method as outlined on the Wiki where new roads are highlighted. The only trick was that deleted roads also would show up as new roads, and recognizing that someone had really deleted an original TIGER road, and it was not a newly created road. Fortunately, this area is a desert of OSM participation, so there were not many delete-road corrections. Just a point of clarification regarding my conflation plugin [0]; currently it is geared towards finding 1-to-1 correspondences, such as matching GNIS nodes to areas. It does not handle N-to-M correspondences like you'll have with roads, and it doesn't take care of topology issues. However there is another user working on a TIGER conflation plugin which should handle these things, but I'm not sure how far he is from having something usable. That being said, I am sorely in need of getting feedback on the design of my conflation plugin.:) I gave it another spin and created a TRAC ticket. The big gain is when I can conflate between layers - either with the conflation pugin or the possible TIGER plugin. There will certainly be other mod wishes for that application such as glomming roads and tag handling such as removing tiger:reviewed... etc. ___ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
