And a timely (no pun intended) reminder that state lines can be fluid too: https://www.washingtonpost.com/national/altered-state-border-redraw-leaves-16-in-different-carolina/2016/05/29/9b2d1908-25ae-11e6-8329-6104954928d2_story.html
On Mon, May 30, 2016, 9:57 AM John F. Eldredge <[email protected]> wrote: > Note that "usually state lines" isn't the same thing as "always state > lines". The Central Time Zone/Eastern Time Zone boundary runs through the > middle of both Tennessee and Kentucky, and the lines aren't straight. They > zig-zag according to which time zone the local politicians wanted. > > > On 05/27/2016 07:49 AM, Greg Troxel wrote: > > > Frederik Ramm <[email protected]> <[email protected]> writes: > > > I have deleted a couple of such time zone polygons account of not being > verifiable on the ground. > > I don't know how time zones are defined "at the source" but it is very > unlikely that someone puts up signs. I guess there'll be some kind of > definition that can be kept *outside* of OSM, and can be translated to > polygons with the help of OSM if desired. > > > This strict on-the-ground notion is overblown. The real issue in > verifiability is if an ordinary mapper can check the data. Everyone > around me knows that timezone they are in. I'm sure everyone near a > boundary knows where it is. The rules are easily accessible in > libraries, and they refer to boundaries that are signed (in the US, > usually state lines). You can look at clocks displayed in public. > > The real issue is where to draw the line about specialized details that > don't belong on map. In the case of time zones, they are something that > has traditionally been represented on maps for a long time, in a base > map kind of way, vs a thematic data shown on a base map kind of way. > > > > _______________________________________________ > Talk-us mailing > [email protected]https://lists.openstreetmap.org/listinfo/talk-us > > > _______________________________________________ > Talk-us mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/talk-us >
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