[Talk-us] New MapRoulette challenge - fix railway crossings

[Mike N]

On 8/4/2015 4:59 PM, Martijn van Exel wrote:
> Also, please even if you see the crossing rendered, do go in and
> check, because I have seen more than once that the crossing node is
> not a shared node between way and rail. (Hint, use 'j' to join node to
> way and 'm' to merge nodes that are (almost) on top of each other.)

  I noticed something interesting about JOSM - if I select an 
intersection that may or may not have 2 duplicate nodes, in some cases 
where there were 2 nodes, the JOSM 'M' command has no effect the first 
time.   Now I always watch and try again if the merge was ignored.   But 
that can be another post-challenge fixup - duplicate nodes on rail crossing.

Other notes:

    Please don't (C)ombine sections of railway unless there is a good 
reason.  I don't know if anyone is combining currently, but there was a 
long span across South Dakota spanning 2 counties and 400 nodes which 
was shifted (perhaps to correct a local problem).   Mappers fixed 
various crossings, and the long way was shifted 2 more times.  I finally 
just manually reviewed and fixed the entire shifted way.

https://www.openstreetmap.org/changeset/33235552