[OSM-talk] LU overlay idea

[Artem Pavlenko]

On 28 May 2007, at 20:13, Steve Chilton wrote:

> Artem,
>
> Good stuff.
> Direction arrows look good.

There are some artifacts I'm aware about, but I think overall it's  
acceptable.
>
> Tubes look promising on a overlay, but becomes problematic if you  
> zoom out as the info then overpowers somewhat.

Yes, you're right.
> Can you apply some kind of "transparency" to the info on the overlay?

Yes, I was thinking about playing with transparency or even grey out  
base map when LU is on.
> Can station symbol also get progressively smaller as you zoom out?

Sure, this is just a sketch. All styles can/must be tweaked.
> Logically shouldn't POIs (like pubs, churches, POs, etc) be on an  
> overlay too? Then they could come in at earlier zooms perhaps.
>

I'd like to experiment with markers for things like POI.
> Incidentally I really don't like the straight line connectors for  
> tubes when in closer zooms. I initially thought they were data spikes!
> Difficulty is surveying where they ACTUALLY go.
> I would like to apply some cartographic licence and turn the longer  
> straight sections into curved lines.

I don't like straight line, either. Perhaps we need some extra  
(control) points to turn straight segments into bezier curves.
>
> NB: if you are in the mapnik style sheet could you check the  
> triangle symbol for natural=peak. I have looked at the file and it  
> seems to call it but doesn't display. See: http:// 
> www.openstreetmap.org/index.html? 
> lat=54.45528832724991&lon=-2.8201885053673745&zoom=15 Two peaks are  
> named but symbol doesn't show. Am inputting all major peaks in Lake  
> District from npe at moment.
> Also could you check on a previous suggestion for picking up names  
> of schools and universities at zoom 16. Doesn't seem to be activated.

OK, I'll have a look.
>
> PS: Am trying to get to be able to edit the style where  
> appropriate, so as not to have to make such requests. Have SVN  
> access. Am de-constructing the style file (offline) to see what  
> does what and then just need to have confidence to make changes and  
> submit back to SVN (which doesn't seem to be explained on wiki as  
> far as I can see). An not on Unix so can't test stuff on mapnik for  
> self which is a blow.

I can help you to setup mapnik  on mac or win32.
>
> Cheers
> STEVE

Cheers,
Artem

>
> 	-----Original Message-----
> 	From: talk-bounces at openstreetmap.org on behalf of Artem Pavlenko
> 	Sent: Mon 5/28/2007 6:28 PM
> 	To: Talk Openstreetmap
> 	Cc:
> 	Subject: [OSM-talk] LU overlay idea
> 	
> 	
> 	Hello everyone,
>
> 	There was an idea to put LU on a separate layer (overlay) . I have  
> created a simple demo, just see how this might look like:
>
> 	http://media.mapnik.org/osm-tube.html
>
> 	How about having something similar on the main map? Also, latest  
> osm.xml has support for directions (arrows).
>
> 	Cheers,
> 	
> 	Artem
> 	http://mapnik.org <http://mapnik.org/>
>
>
>
>
>

Artem Pavlenko
http://mapnik.org



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