place_of_worship too prominent on low zoom

[tyrasd]

The fill colour of churches, etc. looks too dark on low zooms. See this example:

zoom level 14:

zoom level 15:

[mrwojo]

The darkness shift is very noticeable on large areas: http://www.openstreetmap.org/browse/way/179086480

[dieterdreist]

2013/8/4 Martin Raifer [email protected]

The fill colour of churches, etc. looks too prominent on low zooms.

I don't agree. Churches are one of the main features for orientation in
christian countries and traditionally very prominent in maps, for good
reason IMHO.

[tyrasd]

The problem is that place_of_worship gets fairly darker between zoom 15 and 14, which is a quite singular effect in the osm-carto stylesheet:
↔

Note that this wasn't the case in the original osm-mapnik stylesheet:

↔
(compare)

[dieterdreist]

Am 03/nov/2013 um 09:51 schrieb Martin Raifer [email protected]:

The problem is that place_of_worship gets fairly darker between zoom 15 and 14, which is quite singular in the osm-carto stylesheet:

maybe it would be better to focus on building=church (etc.)? Or pow AND building=yes

[pnorman]

Definitely a change from osm.xml. @gravitystorm, know if this was intentional?

[mrwojo]

It appears to be a side-effect of polygon-clip: false in the #buildings-lz layer. The fill is compositing with gray rather than the actual underlying color. The 0.5 opacity allows the gray to show through.

The Carto-generated Mapnik XML contains this unfiltered rule for this layer:

  <Rule>
    <MaxScaleDenominator>750000</MaxScaleDenominator>
    <PolygonSymbolizer clip="false" />
  </Rule>

Gray is indeed the default fill for a polygon symbolizer.

[vincentdephily]

Note that "building=church" is quite orthogonal to "amenity=place_of_worship". The church building could have been deconsecrated and even, as seen in Ireland, turned into a pub, a tourist office, or a carpet shop (!). There is also the case of smaller religions or communities that hold their religious activities in a standard house.

[dieterdreist]

2013/11/5 vincentdephily [email protected]

Note that "building=church" is quite orthogonal to
"amenity=place_of_worship". The church building could have been
deconsecrated and even, as seen in Ireland, turned into a pub, a tourist
office, or a carpet shop (!).

Yes, I am fully aware of that, and my suggestion to concentrate on
building=church etc. reflects this. The main purpose of highlighting
churches (IMHO) in a map is that they serve for orientation, like the
townhall (and eventually the marketplace) they denote the center of the
village/town (often, in big cities they might also indicate the former
borders, as they were placed at the limits in order to make the burials
outside of the city), generally they had a huge influence on how the
city/town evolved through the centuries, and this importance is mostly
still present in the city structure, even if in some cases nowadays they
are not sacred any more. To put it short: the building church / aka former
location of a place of worship is generally more important than actual
places of worship (for most map makers and map consumers).