Re: [OSM-talk] Recent changes to slippymap Mapnik rendering

2008-10-30 Thread Matthew
Apologies if someone's mentioned it already, but I'd like to express my 
appreciation for the new symbol for a barrier across the road.  A simple line 
is exactly what it should be; a letter G in the middle of the road was rather 
confusing!



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Re: [OSM-talk] Recent changes to slippymap Mapnik rendering

2008-10-29 Thread Tom Hughes
David Ebling wrote:

 -Primary, trunk and secondary roads have no casing on them. This makes road
  junctions into a big mess, and you can't see what's what at all.

I believe Steve has already says he plans to reintroduce more casings.

 -The road refs aren't centred properly in their boxes. This looks really
   poor. Also, they aren't as clear as the used to be.

This isn't really new - they have never been very good. We think it is 
some sort of pixel rounding issue in mapnik because sometimes it is 
better than others. The side effect is that the shield can't be shrunk 
as much as I would like as we have to allow space for the text to wander 
around a bit inside the shield.

The real answer is for somebody to implement support for vector symbols 
and shields in mapnik anyway ;-)

 -Train stations were better in red than blue, as they stood out better. 
 Again, I find the new colour too pale.

This one I definitely agree with. I much preferred the old station symbols.

Tom

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Re: [OSM-talk] Recent changes to slippymap Mapnik rendering

2008-10-29 Thread Gustav Foseid
Is there anywhere I can find the stylesheet used for the main Mapnik layer?

 - Gustav
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Re: [OSM-talk] Recent changes to slippymap Mapnik rendering

2008-10-29 Thread Grant Slater
Gustav Foseid wrote:
 Is there anywhere I can find the stylesheet used for the main Mapnik 
 layer?

http://svn.openstreetmap.org/applications/rendering/mapnik/

osm-template-fontset.xml  AFAIK.

I also think you also need the latest SVN mapnik.

/ Grant


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Re: [OSM-talk] Recent changes to slippymap Mapnik rendering

2008-10-29 Thread Dave Stubbs
On Wed, Oct 29, 2008 at 3:52 PM, David Ebling [EMAIL PROTECTED] wrote:
 I've noticed a lot of changes to the Mapnik slippymap rendering lately, and 
 IMHO they are mainly not improvements.

 As the appearance of this map layer has a large impact on the public face of 
 OSM, I think it's important to have lots of people discuss their views on 
 this.

 Personally I don't like many of the recent changes because:

 -Everything's in pastel shades. Bold colours are clearer and look better.
 -Primary, trunk and secondary roads have no casing on them. This makes road 
 junctions into a big mess, and you can't see what's what at all.
 -New icons are a bit pale. I think the old ones looked better. Although I can 
 see reasons for making them smaller, I don't think they are as clear.
 -The road refs aren't centred properly in their boxes. This looks really 
 poor. Also, they aren't as clear as the used to be.
 -Train stations were better in red than blue, as they stood out better. 
 Again, I find the new colour too pale.
 -Road widths at z=17 seem too wide relative to other zoom levels.

 I appreciate the effort people are putting into trying to make the map look 
 as good as possible, but I think we need more opinion input and discussion on 
 what looks best.

 I'm really looking to spark discussion here, rather than be critical, though 
 unfortunately all of my comments happen to be negative.


Here are some positives (they're not that hard to find):
 - Colour scheme is now much more consistent
 - Icons are all the same size and style, and cover more POI types
 - POIs are carefully introduced to avoid clutter at lower zoom levels
 - The new styles emphasise main roads above other features much less
-- OSM is about more than mapping main roads and the new styles serve
to highlight the detail instead of the traditional dominant features.
 - Related to above, cycleways, footways, bridle paths are now much
clearer relative to other features
 - Bridges are much clearer

Dave

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Re: [OSM-talk] Recent changes to slippymap Mapnik rendering

2008-10-29 Thread Andy Allan
On Wed, Oct 29, 2008 at 3:52 PM, David Ebling [EMAIL PROTECTED] wrote:
 As the appearance of this map layer has a large impact on the public face of 
 OSM, I think it's important to have lots of people discuss their views on 
 this.

It's helpful up to a point, but there's a certain amount of art to
cartography, and things can be changed without being technically
better or worse, just different. And in much of this I'm quite happy
to defer to Steve Chilton, what with him being a professional and all
of us (myself included) being new to the game.

 -Everything's in pastel shades. Bold colours are clearer and look better.
 -Primary, trunk and secondary roads have no casing on them. This makes road 
 junctions into a big mess, and you can't see what's what at all.
 -Road widths at z=17 seem too wide relative to other zoom levels.

I disagree, but these are all judgement calls.

 -New icons are a bit pale. I think the old ones looked better. Although I can 
 see reasons for making them smaller, I don't think they are as clear.
 -Train stations were better in red than blue, as they stood out better. 
 Again, I find the new colour too pale.

I agree, but again these are judgement calls.

 -The road refs aren't centred properly in their boxes. This looks really 
 poor. Also, they aren't as clear as the used to be.

Actually a technical issue, so this time not a judgement call :-) This
is the only thing which isn't really an opinion!

 I would go ahead and make what I think are improvements myself, but I don't 
 know anything about tweaking rendering styles.

I'd encourage you to learn - it takes a while, but it's not
insurmountable. I know from experience that it takes a lot of effort
to make OSM stylesheets, but more hands to the pump are welcome. All
the instructions needed for setting up a test mapnik server are on the
wiki (if they aren't, I'll fix them), and you can put some of your
suggestions into practice and see what they look like. Discussions
such as yours are even more valuable if they are accompanied by
screenshots and diffs.

Cheers,
Andy

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Re: [OSM-talk] Recent changes to slippymap Mapnik rendering

2008-10-29 Thread Brian Quinion
 -The road refs aren't centred properly in their boxes. This looks really 
 poor. Also, they aren't as clear as the used to be.
 Actually a technical issue, so this time not a judgement call :-) This
 is the only thing which isn't really an opinion!

I'm currently trying to add options to mapnik to allow this to be
resolved, see also: https://trac.mapnik.org/ticket/104
ETA for a patch is this weekend but then it will have to be accepted,
tested, rolled out, etc...

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Re: [OSM-talk] Recent changes to slippymap Mapnik rendering

2008-10-29 Thread Tom Hughes
Brian Quinion wrote:
 -The road refs aren't centred properly in their boxes. This looks really 
 poor. Also, they aren't as clear as the used to be.
 Actually a technical issue, so this time not a judgement call :-) This
 is the only thing which isn't really an opinion!
 
 I'm currently trying to add options to mapnik to allow this to be
 resolved, see also: https://trac.mapnik.org/ticket/104
 ETA for a patch is this weekend but then it will have to be accepted,
 tested, rolled out, etc...

That ticket has nothing to do with the problem we're discussing here ;-)

The ticket is about how a shield is positioned relative to a POI, but 
we're talking about the positioning of text relative to the shield 
symbol that surrounds it.

We don't use shields for POIs anyway, only for linear objects like 
roads, so the issue in the ticket won't affect us at all as far as I can 
see.

Tom

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Re: [OSM-talk] Recent changes to slippymap Mapnik rendering

2008-10-29 Thread Michal Migurski
 I'm really looking to spark discussion here, rather than be  
 critical, though unfortunately all of my comments happen to be  
 negative.


 Here are some positives (they're not that hard to find):
 - Colour scheme is now much more consistent

Consistently bland. =(

 -- OSM is about more than mapping main roads and the new styles serve
 to highlight the detail instead of the traditional dominant features.

This is a huge positive, important to mention.

FWIW, I've been working on my own stylesheets that I've posted here  
before.

Here are some comparisons to regular OSM:

http://s3.amazonaws.com/mike.teczno.com-img/osm-comparisons-20081029/bayarea-low.png

http://s3.amazonaws.com/mike.teczno.com-img/osm-comparisons-20081029/bayarea-medium.png

http://s3.amazonaws.com/mike.teczno.com-img/osm-comparisons-20081029/bayarea-high.png


http://s3.amazonaws.com/mike.teczno.com-img/osm-comparisons-20081029/osm-low.png

http://s3.amazonaws.com/mike.teczno.com-img/osm-comparisons-20081029/osm-medium.png

http://s3.amazonaws.com/mike.teczno.com-img/osm-comparisons-20081029/osm-high.png

An actual slippy map is available here, under OpenStreetMap:
http://teczno.com/old-oakland/

I've similarly been trying to place greater emphasis on non-road  
features, esp. rail, schools, and parks. I think I'm also a little  
closer to the mark with road shields and choice of place names. I'm  
missing airports and forests entirely. Recently, I added a few of Matt  
Amos' excellent icons with more on the way for amenities etc.. I've  
also opted for a more US-centric rendering style that puts freeways in  
red and places less emphasis on primary and secondary roads (which  
don't have quite the same definite meaning here as in the UK, I  
believe).

The stylesheets are controlled through a pre-processor I've been  
working on called Cascadenik:
http://code.google.com/p/mapnik-utils/

...with the actual stylesheets here:

http://mapnik-utils.googlecode.com/svn/trunk/serverside/cascadenik/openstreetmap/

I believe the cascadenik stylesheets might be easier for a newcomer to  
modify than the pure mapnik ones, and I'd be interested in exploring a  
way to vary the road color rendering among countries. I know that  
there are different cartographic conventions everywhere, it'd be  
interesting to see OSM support these.

-mike.


michal migurski- [EMAIL PROTECTED]
  415.558.1610


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Re: [OSM-talk] Recent changes to slippymap Mapnik rendering

2008-10-29 Thread Brian Quinion
 resolved, see also: https://trac.mapnik.org/ticket/104
 That ticket has nothing to do with the problem we're discussing here ;-)

 The ticket is about how a shield is positioned relative to a POI, but we're
 talking about the positioning of text relative to the shield symbol that
 surrounds it.

Um - no the ticket is regarding position shield and text relative to
each other.  Offsetting relative to the POI is already pressent in
mapnik.

While the ticket creator wanted it for a different purpose (placing
text under a symbol) it can also be used to apply an small vertical
offset in this cases as well to correct the text placement.  Of course
this assumes Steve/Other doesn't find an alternative fix from the xml
before that.

 We don't use shields for POIs anyway, only for linear objects like roads, so
 the issue in the ticket won't affect us at all as far as I can see.

Probably the case.

--
 Brian

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