> ----- Original Message -----
From: "Michal Migurski" <m...@stamen.com>
To: "Talk Openstreetmap" <talk@openstreetmap.org>
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
A few sample errors:
http://tile.stamen.com/coastline-next/preview.html#7/46.844/-86.764
The two pink "2's" were identified by the coastline error checker, and (I
think) indicate an island with part of its coastline facing away from the
water. The three green "X's" represent self-intersections picked up by
PostGIS, and if you zoom in more closely you'll see where they are to fix
them. I've recently fixed up a number of self-intersections around South
America, Mexico and the US:
http://www.openstreetmap.org/user/migurski/edits
The data for this view is linked here:
http://metro.teczno.com/#coastline
…and the stylesheets are here:
https://github.com/migurski/Extractotron/tree/master/coastline-preview
I hope to keep this view up to date regularly, though it's possible I'll
forget from time to time. I've been watching edits near these points and
there are a few mappers getting to them before I do:
http://www.openstreetmap.org/user/dmgroom_ct/edits
http://www.openstreetmap.org/user/PA94/edits
PA94 certainly seems to have got started on these quickly :)
David
I've been dating blocks from versions of the coastline, they can be viewed
here:
http://tile.stamen.com/coastline-current/preview.html#8/46.106/-84.303
-mike.
----------------------------------------------------------------
michal migurski- m...@stamen.com
415.558.1610
_______________________________________________
talk mailing list
talk@openstreetmap.org
http://lists.openstreetmap.org/listinfo/talk
