[mkgmap-dev] default style improvements

Mon Jan 7 10:20:35 GMT 2019

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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> > mkgmap-dev at lists.mkgmap.org.uk
> >
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> >
> >
>
>
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