[OSM-talk] What's wrong with this picture?

[David Groom]

----- Original Message ----- 
From: "Michal Migurski" <mike at stamen.com>
To: "Talk Openstreetmap" <talk at openstreetmap.org>
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

>
> The code:
> https://github.com/migurski/Extractotron/blob/master/coastline-errors.sh
>
> I'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 good tiles, so it might have out-of-date areas but generally good-looking 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.html
>
> Just need to get southern Chesapeake Bay replaced, I think I fixed the 
> problem in changeset #10030763.
>
> -mike.
>
> ----------------------------------------------------------------
> michal migurski- mike at stamen.com
>                 415.558.1610
>
>
>
>
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