On Tue, Feb 21, 2012 at 3:26 PM, Alan Mintz <alan_mintz+...@earthlink.net> wrote: > At 2012-02-21 10:40, Martijn van Exel wrote: >> >> On Tue, Feb 14, 2012 at 1:17 PM, Dave Hansen <d...@sr71.net> wrote: >> > On 02/13/2012 05:19 PM, Nathan Edgars II wrote: >> >> It could just as easily be local mapping gone awry, by a local who >> >> thinks only state highways should be primary. The TIGER import would >> >> not >> >> have included any primaries, since there are no U.S. Highways in Fresno >> >> (though any such would be motorway). >> > >> > Here were the a2* mappings from the original import, fwiw: >> > >> This seems to have been taken from >> https://wiki.openstreetmap.org/wiki/TIGER_to_OSM_Attribute_Map >> What annoys me about that page (a lot, actually) is that there is no >> clarity as to whether this is the *actual* mapping used. > > > There does not seem to be a direct correlation between the original > tiger:cfcc values and the highway=* tag any more. Some roads were (properly) > promoted to secondary since the original import. Some of those should be > promoted further (to primary). > > I wouldn't focus so much on those original values, or what was originally > done at import, since the TIGER classifications are known to be incorrect as > compared with local knowledge and official definitions by city planners. Did > you see my previous post? I provided a link to the planning data that > describe the official planning categories and how I would map them to OSM. >
I wasn't around in the US community when the discussions over classifications were going on, or when the TIGER import was done. I am finding that understanding the current reality of road tagging in the US is very difficult without inquiring about those discussions and decisions. I do appreciate that it is of historical significance only, but I still think something as major as the TIGER import should be properly documented, which it turned out it was not. So I'm looking to do at least that. Without those basics in place I see no way we can even think about cleaning up the various wiki pages that deal with US road classifications. As it is, it is almost impossible for mappers to determine how to map highway=* from the information on there. I did see your previous post and I think local data such as that document will be helpful, although I think we also need a set of basic rules that mappers can follow. The current classification page [1] is on its way to providing that but contains way too much information in terms of local and regional exceptions and too little visual cues (images). I'm not saying that the information on there is not useful, but I think the page should be broken up into a page that gives mappers a set of universal rules for classification that can be applied nationwide, and other pages that provide more in-depth information pertaining to ref= tagging and local / regional peculiarities that don't affect the basic classification. Martijn [1] https://wiki.openstreetmap.org/wiki/United_States_roads_tagging -- martijn van exel geospatial omnivore 1109 1st ave #2 salt lake city, ut 84103 801-550-5815 http://oegeo.wordpress.com _______________________________________________ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
