Hi Felix,
I do understand that one would want to avoid rendering gates which are not on
highways, but I don't understand why you care about
the effect on routing. That's a completely different story and I think mkgmap
handles this very well with the --link-pois-to-ways option.
Or maybe you mean something else?
A barrier node should never be connected to more than one way, else it is a
mapping error and mkgmap reports this in the log (if enabled).
It should be a rare case and thus I see no need to add lots of logic to avoid
the rendering.
The corresponding nodes should be fixed in OSM.
Gerd
________________________________________
Von: mkgmap-dev <mkgmap-dev-boun...@lists.mkgmap.org.uk> im Auftrag von Felix
Herwegh <mlmm...@herwegh.de>
Gesendet: Samstag, 15. Oktober 2022 18:36
An: mkgmap-dev@lists.mkgmap.org.uk
Betreff: Re: [mkgmap-dev] Test if POI is part of a line
> I would only like to display barrier/highway=gate point icons if they are
> part of a (best routable) line.
Since I try to declutter my maps as best as possible I too had "remove
non-relevant gates" on my to do list and followed up on that today.
Accounting for points mapped on or between ways and access restrictions
optionally stemming from point and/or way I was able, to already thin out my
gates significantly. The include file is just "re-used" from my lines
processing.
# NoAccess gates on relevant highways
# only works w/ mkgmap option --add-pois-to-lines
if (mkgmap:from-node:barrier ~ '.*(gate)' & highway=*) then
# gate on highway
include "../inc/RaceSurf";
# tagging of (preselected) elements w/ hgh:surface=(Race|noRace)
# depending on quality in regard to race (and gravel) bike use
if (hgh:surface=Race) then
(mkgmap:from-node:access ~ 'no|private
& !(mkgmap:from-node:bicycle ~ 'yes|permissive')
...)
# relevant access restricted by point
|
(access ~ 'no|private'
& !(bicycle ~ 'yes|permissive')
...)
# relevant access restricted by road segment
[...]
end
end
But I was not able, to solve the probably most interesting situation:
If a (gate) point is part of two (or more) consecutive ways, it is processed
multiple times from --add-pois-to-lines, but one would need the tags of all
ways involved at the same time to make the final decision on whether or not to
render this point. (That is -for starters-, if not at least two ways were
deemed interesting, the gate might not be rendered although from one way alone,
it would).
Is there a concept, allowing to do that?
The only idea I came up with would be, to use the mkgmap:line2poitype tag to
flag these POIs somehow and finally delete all, if not at least 2 of those
where placed at the exact same location. Somewhat similar to deleting identical
POIs at the same location as documented for the nearby-poi-rules. In the latter
case (>2), delete all but one...
Cheers, Felix
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