It seems that OSM has a an architectural problem with over-large relations?
Is modifying the relations in potentially arbitrary ways a good solution?
Seeking something that may work now, can any "size-based" relation
splits be done in a way that they can be automatically removed at some
futute point? Is there a meta-relation structure that can relate
relations, or is that just a relation?
I do not know enough about how OSM is implemented to make real
suggestions, but changing the data for this seems like a bad smell.
cheers - ray
On 11/21/20 9:06 AM, Clay Smalley wrote:
I posted this on the Slack but I figured I should put this on the
mailing list to make sure it reaches everybody:
Many long-distance Amtrak trains have route relations with 1000+
members. If I split one way that happens to be a member of one of
these routes, I end up with a changeset with a gigantic bounding box,
and often get edit conflicts due to someone doing a similar change
hundreds of miles away along the same line. I really would like to
split up these relations into smaller chunks to make them more manageable.
One way of doing that would be to split them up by state (as US and
Interstate highways are) but that seems odd for a train relation,
since they'd start and end at places that aren't train stations
(except maybe Texarkana). My other thought would be to split them up
at "station stops", where trains dwell for 10+ minutes to facilitate
crew changes and allow passengers to step off the train and get some
fresh air. These are roughly every 4 hours apart schedule-wise
(typically 200-300 miles apart). The annoying part is that station
stops are not well-advertised and you pretty much need to ride the
train to figure out where they are.
Other suggestions on the Slack include splitting them up by the
underlying railway infrastructure lines (aka subdivisions). I'm not
convinced this is an intuitive way to approach splitting long routes
into sub-relations.
Anybody have opinions one way or the other?
-Clay
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