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=42.001&lon=-120.048&zoom=9&layers=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=41.62&lon=-120.053&zoom=9&layers=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
Ok, I got it. There are artifacts from rendering adjacent coast-line
polygons (which are tiled - 100x100km squares inland)
This will be fixed when we upgrade to new coastline shape files - new
tiles overlap by 150m and don't have these faint lines
Artem
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