[mkgmap-dev] default style improvements

Wed Jan 9 15:15:56 GMT 2019

Hi Ticker,

I think that's too much. I'd use
# squares and plazas
place=square [0x17 resolution 22]
highway=pedestrian & (area=yes | mkgmap:mp_created=true) [0x17 resolution 22]
# following rule also renders a closed way without area attribute as a plaza
highway=pedestrian & area!=no [0x17 resolution 22]

I would not comment any of them in the default style and users who really care should be able 
to find which one they don't like.

Gerd
________________________________________
Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Ticker Berkin <rwb-mkgmap at jagit.co.uk>
Gesendet: Dienstag, 8. Januar 2019 17:11
An: Development list for mkgmap
Betreff: Re: [mkgmap-dev] default style improvements

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<mailto:mkgmap-dev-bounces at lists.mkgmap.org.uk>
im Auftrag von Ticker Berkin <
rwb-mkgmap at jagit.co.uk<mailto:rwb-mkgmap at jagit.co.uk>

Gesendet: Montag, 7. Januar 2019 10:55
An:
mkgmap-dev at lists.mkgmap.org.uk<mailto: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

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