[mkgmap-dev] default style improvements

Tue Jan 8 16:11:15 GMT 2019

Hi
I propose this in 'lines':
# squares and plazas
place=square [0x17 resolution 22]
# squares/plazas are also mapped as highway=pedestrian areas.
# The tag area=yes forces the polygon element to be considered an area
and there is an understanding that
# derivation from a multipolygon relation does likewise, hence this is
the appropriate rule:
#highway=pedestrian & (area=yes | mkgmap:mp_created=true) [0x17
resolution 22]
# However, many squares are mapped as simple closed ways without any
area tag and, to show these, an
# alternative rule is needed, which assumes an area unless explicitly
not:
highway=pedestrian & area!=no [0x17 resolution 22]
# Note that this rule will catch polygon elements that might not have
been intended to be squares/plazas.
# Only one of the above rules is needed
Is this reasonably clear? should I leave both rules uncommented or
comment the other way around?
Ticker
On Tue, 2019-01-08 at 00:30 +0100, Lorenzo Mastrogiacomi wrote:
> Can it be like this? So I can just comment the second rule to be
> happy
> :)
> 
> 
> highway=pedestrian & (area=yes | mkgmap:mp_created=true) [0x17
> resolution 22]
> # assume that a closed way with highway=pedestrian is meant to
> describe
> an area even if area=yes is missing
> highway=pedestrian & area!=no [0x17 resolution 22]
> 
> 
> 
> Il giorno lun, 07/01/2019 alle 10.20 +0000, Gerd Petermann ha
> scritto:
> > I think it is OK when you add a comment like
> > # assume that a closed way with highway=pedestrian is meant to
> > describe an area even if area=yes is missing
> > 
> > Gerd
> > 
> > ________________________________________
> > Von: mkgmap-dev <
> > mkgmap-dev-bounces at lists.mkgmap.org.uk
> > > im Auftrag von Ticker Berkin <
> > rwb-mkgmap at jagit.co.uk
> > > 
> > Gesendet: Montag, 7. Januar 2019 10:55
> > An: 
> > mkgmap-dev at lists.mkgmap.org.uk
> > 
> > Betreff: Re: [mkgmap-dev] default style improvements
> > 
> > Hi
> > 
> > Reading some of the relevant wiki pages, I am finding the wording
> > ambiguous.
> > 
> > https://wiki.openstreetmap.org/wiki/Key:area
> > 
> > https://wiki.openstreetmap.org/wiki/Tag:highway%3Dpedestrian
> > 
> > https://wiki.openstreetmap.org/wiki/Area
> > 
> > 
> > It seems wrong that the handling of the area= tag is not consistent
> > between polygons generated from closed ways and those generated by
> > multipolygon relations, but, if you assert that it is, I'll respect
> > it.
> > 
> > Regardless, there are a lot of Piazzas that are not generated from
> > a
> > multipolygon and don't have the area tag, eg
> > 
> > https://www.openstreetmap.org/way/601220094
> > 
> > https://www.openstreetmap.org/way/256580148
> > 
> > https://www.openstreetmap.org/way/173770171
> > 
> > 
> > My 'polygons' change as it stands:
> > 
> >  highway=pedestrian & area!=no [0x17 resolution 22]
> > 
> > will show these as piazza, along with other areas that might not
> > be.
> > If I change it to:
> > 
> >  highway=pedestrian & (area=yes | mkgmap:mp_created=true) [0x17
> > resolution 22]
> > 
> > it won't show them.
> > 
> > Which is preferred?
> > 
> > Ticker
> > 
> > On Sun, 2019-01-06 at 20:37 +0100, Lorenzo Mastrogiacomi wrote:
> > > It's not what I meant.
> > > 
> > > The example you provided is a multipolygon relation and
> > > multipolygons
> > > are always areas regardless if area=yes is set or not.
> > > So this is not a valid example, actually I can not find one
> > > really
> > > evident of missing area=yes on pedestrian areas.
> > > 
> > > 
> > > Lorenzo
> > > 
> > > 
> > > 
> > > 
> > > Il giorno dom, 06/01/2019 alle 17.37 +0000, Ticker Berkin ha
> > > scritto:
> > > > Hi
> > > > 
> > > > I don't see anything in the OSM definition of a square that
> > > > requires
> > > > it
> > > > to come from a multipolygon relation
> > > > 
> > > > https://wiki.openstreetmap.org/wiki/Tag:highway%3Dpedestrian
> > > > 
> > > > 
> > > > 
> > > > Ticker
> > > > 
> > > > On Sun, 2019-01-06 at 17:46 +0100, Lorenzo Mastrogiacomi wrote:
> > > > > Il giorno dom, 06/01/2019 alle 12.45 +0000, Ticker Berkin ha
> > > > > scritto:
> > > > > > Hi Lorenzo
> > > > > > 
> > > > > > I know that the OSM definition says square should have
> > > > > > area=yes,
> > > > > > but
> > > > > > I
> > > > > > find a vast number where there is no area tag and they seem
> > > > > > to
> > > > > > be
> > > > > > square/piazza, eg
> > > > > > 
> > > > > > https://www.openstreetmap.org/relation/5174171
> > > > > > 
> > > > > > 
> > > > > 
> > > > > 
> > > > > This is a multipolygon.
> > > > > The current rule to handle this with the mkgmap:mp_created
> > > > > tag
> > > > > is
> > > > > fine
> > > > > for a default style in my opinion.
> > > > > 
> > > > > 
> > > > > > With Italy data from July 2018, I get about 5000
> > > > > > highway=pedestrian
> > > > > > polygons without an area tag, and, from a small sample,
> > > > > > about
> > > > > > 1
> > > > > > in
> > > > > > 3
> > > > > > look like piazza.
> > > > > > The only effect is that a polygon is generated, it doesn't
> > > > > > effect
> > > > > > routes. I prefer to see the possible square rendered.
> > > > > > 
> > > > > 
> > > > > I don't. 1 in 3 correct is not so good :)
> > > > > 
> > > > > 
> > > > > 
> > > > > > Ticker
> > > > > > 
> > > > > > 
> > > > > 
> > > > > 
> > > > > Lorenzo
> > > > > 
> > > > > 
> > > > > 
> > > > > 
> > > > > _______________________________________________
> > > > > mkgmap-dev mailing list
> > > > > mkgmap-dev at lists.mkgmap.org.uk
> > > > > 
> > > > > 
> > > > > http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
> > > > > 
> > > > > 
> > > > 
> > > > _______________________________________________
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> > > > 
> > > > 
> > > > http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
> > > > 
> > > > 
> > > > 
> > > 
> > > 
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> > > 
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> > > 
> > 
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