[OSM-talk] Mapnik rendering artifacts

2008-01-30 Thread Karl Newman
I'm seeing faint gray lines on the main site slippy map Mapnik base layer,
and I'm at a loss to explain their source. At first I thought they were
state borders, but I'm seeing the lines running through the middle of
states, too (here
http://www.openstreetmap.org/?lat=42.001lon=-120.048zoom=9layers=B0FT it
runs vertically through the middle of Oregon). Then I thought they were tile
boundaries, but that's not consistent, either. Even weirder is on the
California-Nevada border, there are two vertical lines right next to each
other, not always parallel. (See here:
http://www.openstreetmap.org/?lat=41.62lon=-120.053zoom=9layers=B0FT). I
downloaded that area in JOSM but all I saw was a single state border way. It
doesn't seem to have a source in the OSM data, so maybe it's something
caused by the conversion to pgsql or by the renderer itself (maybe a
projection issue)? I don't think it's related to the recent mod_tile
changes, because as far as I know that only affects how the tiles are stored
and served, not how they're rendered. (If I've said something stupid, please
forgive me. I *think* I understand the process...)

Any thoughts, anyone?

Karl
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Re: [OSM-talk] Mapnik rendering artifacts

2008-01-30 Thread Artem Pavlenko


On 30 Jan 2008, at 12:41, Karl Newman wrote:

I'm seeing faint gray lines on the main site slippy map Mapnik base  
layer, and I'm at a loss to explain their source. At first I  
thought they were state borders, but I'm seeing the lines running  
through the middle of states, too (here http:// 
www.openstreetmap.org/?lat=42.001lon=-120.048zoom=9layers=B0FT  
it runs vertically through the middle of Oregon). Then I thought  
they were tile boundaries, but that's not consistent, either. Even  
weirder is on the California-Nevada border, there are two vertical  
lines right next to each other, not always parallel. (See here:  
http://www.openstreetmap.org/? 
lat=41.62lon=-120.053zoom=9layers=B0FT). I downloaded that area  
in JOSM but all I saw was a single state border way. It doesn't  
seem to have a source in the OSM data, so maybe it's something  
caused by the conversion to pgsql or by the renderer itself (maybe  
a projection issue)? I don't think it's related to the recent  
mod_tile changes, because as far as I know that only affects how  
the tiles are stored and served, not how they're rendered. (If I've  
said something stupid, please forgive me. I *think* I understand  
the process...)


Any thoughts, anyone?


railtracks ?

Artem




Karl
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