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This macro tile seems to be infected by the sea:
http://www.openstreetmap.org/?lat=36.0742&lon=126.8671&zoom=13&layers=CAll tiles below it are rendered with a blue tinge.
The rendering artifact is not present on the new 'Transport' layer (which
is very nice, by the way).
I had a quick look at the data in the top left corner of the bad tile, but
there's nothing obvious. It's also strange that the top left corner of
the tile is 'sliced off'.
I didn't know whether to send a message to Andy Allan directly, so I
decided to post here.
Um, I guess I want someone to fix it, or tell me what's wrong and I will
fix it.
Best wishes,
Andrew
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It seems that there was a problem with the coastline there. When the
coastline is broken, this can flood such an area.
As other maps are not affected, I tend to think that the problem was
solved, so you need to wait for OpenCycleMap to refresh these tiles.
Yves
On 08. 12. 11 03:36, Andrew Errington wrote:
> This macro tile seems to be infected by the sea:
>
> http://www.openstreetmap.org/?lat=36.0742&lon=126.8671&zoom=13&layers=C>
> All tiles below it are rendered with a blue tinge.
>
> The rendering artifact is not present on the new 'Transport' layer (which
> is very nice, by the way).
>
> I had a quick look at the data in the top left corner of the bad tile, but
> there's nothing obvious. It's also strange that the top left corner of
> the tile is 'sliced off'.
>
> I didn't know whether to send a message to Andy Allan directly, so I
> decided to post here.
>
> Um, I guess I want someone to fix it, or tell me what's wrong and I will
> fix it.
>
> Best wishes,
>
> Andrew
>
>
> _______________________________________________
> talk mailing list
> [hidden email]
> http://lists.openstreetmap.org/listinfo/talk>
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2011/12/9 David Groom < [hidden email]>:
> Someone had been "tidying" up the coastline and making it part of admin
> boundaries, but they had managed to get the direction of the coastline ways
> wrong. I fixed this some weeks ago, so it should render OK the next time the
> coastline files are updates
Thank you. I tried to mark some (most?) of the affected tiles as
dirty, but I am not sure if this works for low-zoom as well.
cheers,
Martin
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----- Original Message -----
From: "Martin Koppenhoefer" < [hidden email]>
To: "David Groom" < [hidden email]>
Cc: < [hidden email]>
Sent: Friday, December 09, 2011 11:50 AM
Subject: Re: [OSM-talk] What's wrong with this picture?
> 2011/12/9 David Groom < [hidden email]>:
>> Someone had been "tidying" up the coastline and making it part of admin
>> boundaries, but they had managed to get the direction of the coastline
>> ways
>> wrong. I fixed this some weeks ago, so it should render OK the next time
>> the
>> coastline files are updates
>
>
> Thank you. I tried to mark some (most?) of the affected tiles as
> dirty, but I am not sure if this works for low-zoom as well.
>
I'm not sure either, but even the higher zoom tiles if re-rendered will not
look OK unless the coastline shapefile has been updated recently
David
> cheers,
> Martin
>
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On Dec 9, 2011, at 3:29 AM, David Groom wrote:
> Martin
>
> Someone had been "tidying" up the coastline and making it part of admin boundaries, but they had managed to get the direction of the coastline ways wrong. I fixed this some weeks ago, so it should render OK the next time the coastline files are updates
David, thanks for continuing to check up on coastline errors!
I recently made some updates to the code behind the Metro Extracts ( http://metro.teczno.com) that pushes the coastline files through PostGIS and hunts down additional errors there. Many aren't interesting (nested holes) but some do lead to bugs in PostGIS and Mapnik's ability to render tiles, self-intersections being the largest problem. I'll be updating the site with new error shapefiles when the process stops running over the next 24 hours.
The code:
https://github.com/migurski/Extractotron/blob/master/coastline-errors.shI've also been maintaing a coastline table that contains only last-known good tiles, so it might have out-of-date areas but generally good-looking coastlines everywhere. You can see that here:
http://tile.stamen.com/terrain-background/preview.htmlJust need to get southern Chesapeake Bay replaced, I think I fixed the problem in changeset #10030763.
-mike.
----------------------------------------------------------------
michal migurski- [hidden email]
415.558.1610
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----- Original Message -----
From: "Michal Migurski" < [hidden email]>
To: "Talk Openstreetmap" < [hidden email]>
Sent: Sunday, December 11, 2011 9:07 PM
Subject: Re: [OSM-talk] What's wrong with this picture?
> On Dec 9, 2011, at 3:29 AM, David Groom wrote:
>
>> Martin
>>
>> Someone had been "tidying" up the coastline and making it part of admin
>> boundaries, but they had managed to get the direction of the coastline
>> ways wrong. I fixed this some weeks ago, so it should render OK the next
>> time the coastline files are updates
>
>
> David, thanks for continuing to check up on coastline errors!
>
> I recently made some updates to the code behind the Metro Extracts
> ( http://metro.teczno.com) that pushes the coastline files through PostGIS
> and hunts down additional errors there. Many aren't interesting (nested
> holes) but some do lead to bugs in PostGIS and Mapnik's ability to render
> tiles, self-intersections being the largest problem. I'll be updating the
> site with new error shapefiles when the process stops running over the
> next 24 hours.
It will be interesting to see how many errors that highlights
David
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> ----- Original Message -----
> From: "Michal Migurski" < [hidden email]>
> To: "Talk Openstreetmap" < [hidden email]>
> Sent: Tuesday, December 13, 2011 6:33 AM
> Subject: Re: [OSM-talk] What's wrong with this picture?
>
>
> On Dec 12, 2011, at 8:38 AM, David Groom wrote:
>
>>> I recently made some updates to the code behind the Metro Extracts
>>> ( http://metro.teczno.com) that pushes the coastline files through
>>> PostGIS
>>> and hunts down additional errors there. Many aren't interesting (nested
>>> holes) but some do lead to bugs in PostGIS and Mapnik's ability to
>>> render
>>> tiles, self-intersections being the largest problem. I'll be updating
>>> the
>>> site with new error shapefiles when the process stops running over the
>>> next 24 hours.
>>
>> It will be interesting to see how many errors that highlights
Mike,
thanks for the new shapefiles, they will be very useful
PA94 certainly seems to have got started on these quickly :)
David
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