On Tue, May 3, 2016 at 2:46 AM, Jinal Foflia <[email protected]> wrote:
> There has been a recent push to improve the coverage of exit numbers and > destination signs on the motorways in the US by the data team at Mapbox. > Some context here [1][2][3][4]. The primary sources of data were DoT > documents and Mapillary images. > One of the first things that I mapped was exit numbers. At least that would provide some clue about the distance you have left or what not. That is a great first step but the focus is on urban mapping. More important for long distance driving or even navigation are mile markers. The exit numbers are tied to the mile markers. The traffic engineer makes a decision on an exit number based on the proximity of a mile marker. I have added part of a press release[2] from Arizona DOT. Milepost/mile maker 346 is referenced. Milepost/mile markers are far more valuable[1] but are not rendered and thus have little value to an urban mapper or little reward for the effort involved. Also note that the exit numbers/mile makers for a motorway will reset at state borders. As I recall I-15 ends around 411 as you enter Idaho. Finally, expect gaps in the the exit numbers. Two or more routes may share a section of the road for awhile until they diverge in other directions. Another case, is when the route is split by a city. In this case, a route might have run through a city at one time. The work flow that you mention drive me batty.[0] At one time there was a discussion on the list about moving exit_to tags as destination tags on the ramp. I moved most of the exit_to tags that I mapped to the ramps. Here you are proposing something different by leaving some exit_to tags and adding destination tags occasionally. The batty part, is that the original way I mapped these without exit_to was what I found in Europe. It looks like Paul has a point because junction:ref is in the wiki page that Duane cites. I don't know that you can use "does not look like the x tagging scheme is very common" or "we will continue to follow the conventional tagging" when the wiki page has changes as recent as 9/2015. I don't mind adding these features but there has to be something presented on the main OSM maps other than another art project. If you are looking for mapper participation or encouraging passive users to become mappers, then there has to be a reward on the main OSM site. Otherwise, OSM has developed the most boring video game that shows no lights nor rings any bells. It is the cartographers and not the importers that are killing off mappers! Regards, Greg [0] https://gist.github.com/poornibadrinath/f982a947c6a063ed1a9016a2d3246d4a Look out for red outer circle for missing destination. Use open in JOSM button to open the node in JOSM. Orange outer circle represents exit_to tag and we don't need to add destination tags in the way. Green outer circle represent that the concern way already has destination tag. [1] http://www.openstreetmap.org/node/3910143420 [2] Bridge work to close State Route 89 for four hours late Friday Those traveling between Prescott and I-40 should consider alternate routes PHOENIX ‒ State Route 89 will close for four hours approximately 13 miles north of Chino Valley starting at 9 p.m. Friday, May 6, so crews can pour a concrete bridge deck at Hell Canyon __(milepost 346).__ It’s one of the final steps in readying a $14.4 million bridge scheduled to open to traffic in mid-June.
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