[OSM-talk] query nodes by attributes of connected ways?
Roland Olbricht
olbricht at mentz.net
Fri Jun 4 06:38:56 UTC 2021
Hello,
> I'm am trying to extract a set of nodes that represent signalized intersections with bike infrastructure leading into them.
>
> the trouble I have run into is that I don't think there is a way to query nodes according to the attributes of the ways that connect to them.
area[name="Great Britain"]->.a;
way[highway=cycleway](area.a);
node(w)[highway=traffic_signals];
out;
gives you all nodes in Great Britain that have the tag
highway=traffic_signals and are part of a way with tag
highway=cycleway. The query is somewhat slow, thus I suggest to
experiment with a bounding box:
way[highway=cycleway]({{bbox}});
node(w)[highway=traffic_signals];
out;
There are suspiciously few results. You can relax the way condition
with an union:
( way[highway=cycleway]({{bbox}});
way[bicycle~"^(permissive|designated|yes)$"]({{bbox}}); );
node(w)[highway=traffic_signals];
out;
and/or the node condition with an union:
( way[highway=cycleway]({{bbox}});
way[bicycle~"^(permissive|designated|yes)$"]({{bbox}}); )->.w;
( node(w.w)[highway=traffic_signals];
node(w.w)[crossing]; );
out;
Best regards,
Roland
NB: This is not an opinion of my employer, but my personal account is
today inaccessible due to a faulty laptop.
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