Paul escribió: > Worked for me earlier today on a TOTSO that was previously missed. > Tested with just one through_route relation, and also worked for me. > Cheers > > Paul > > On 06/02/10 18:43, Mark Burton wrote: > >> v2 - no longer requires the node to have role "junction" >> >> This patch also includes two other changes to the heading adjustment >> code: >> >> When matching arcs, as a last resort, match road class and speed. >> >> If at a node, an outgoing arc cannot be matched to an incoming arc by >> possiblySameRoad(), try to find a single outgoing arc that has the >> same road class and speed as the incoming arc and use that. >> >> and: >> >> When adjusting turn headings apply all relevant adjustments. >> >> Previously, if a heading needed adjusting because the delta from the >> outgoing arc was too small, it did not then consider whether the delta >> from the incoming arc was too small also. Now, it considers both cases >> and adjusts the heading as appropriate. >> >> So please test even if you are not adding any through_route relations >> and if you see any notable changes (good or bad) please say. >> >> -------------------- >> >> This new relation (type through_route) specifies which 2 ways are the >> "through route" at a junction. The relation requires 2 ways (no role >> required) and a node with role = junction. It should only be used at >> those junctions where the through route cannot be reliably inferred >> from the ways' names and/or refs. >> >> Here's an example from my local town: >> >> | 1 >> | / >> | / >> |/ >> A >> | >> | >> | >> | >> B >> /| >> / | >> / | >> 2 | >> >> The vertical road is the "through route", i.e. you can drive from one >> end to the other without crossing any white lines. But, from point 1 to >> point 2 is a B road so ways 1-A, A-B, and B-2 all have some ref, >> say, B1234. >> >> Without the through_route relation, mkgmap assumes (erroneously) >> that the through route is 1-2 because all of the ways in that route >> have the ref B1234. >> >> By adding 2 through_route relations (one at A and the other at B), >> mkgmap is informed of the real through route and will take that into >> account when adjusting the turn headings. The end result is that the >> quality of the routing directions is improved (we hope). >> >> In this example, we need to have 2 relations because the B road >> joins/leaves the through route at two places. >> >> So if you know of any junctions that would benefit from this relation, >> please add it to the map data and try this patch to see if it improves >> the routing instructions. >> >> Mark >> >> >> >> >> _______________________________________________ >> mkgmap-dev mailing list >> mkgmap-dev@lists.mkgmap.org.uk >> http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev >> > > _______________________________________________ > mkgmap-dev mailing list > mkgmap-dev@lists.mkgmap.org.uk > http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev > >
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