[OSM-talk] Coastline errors ( was Argh, Canvec imports)

[David Groom]

> ----- Original Message ----- 
> From: "Simone Cortesi" <simone at cortesi.com>
> To: "Michal Migurski" <mike at stamen.com>
> Cc: "Talk Openstreetmap" <talk at openstreetmap.org>
> Sent: Thursday, November 17, 2011 9:54 AM
> Subject: Re: [OSM-talk] Argh, Canvec imports
>
>
>
> On Thu, Nov 17, 2011 at 08:40, Michal Migurski <mike at stamen.com> wrote:
>> A cry of frustration:
>>
>> I do bimonthly runs of the worldwide coastlines
>> (http://metro.teczno.com/#coastline), and Canada seems to be a recurring
>> source of problems. What the heck is going on up there? I consistently 
>> see
>> new imports of what seems to be Canvec data screwing up coastlines and
>> making for some deeply broken renders:
>>
>> http://mike.teczno.com/img/broken-coast.png
>>
>> Most of that junk in the Atlantic Ocean is newly introduced within the
>> last few weeks, and is making it difficult to get out a clean coastline
>> suitable for rendering. It shows up in the main OSM mapnik tiles in 
>> Hudson
>> Bay, too:
>>
>> http://www.openstreetmap.org/?lat=55.7&lon=-83.6&zoom=5&layers=M
>>
>> I've been trying to fix problems as I encounter them and I've managed to
>> fix invalid coastilnes around Baltimore, Houston, Tampa and the dreaded
>> Montréal area in an effort to generate a usable map of North America, but
>> this Canvec stuff is absolutely killing me.
>
> I care about the coastline too,
> long time ago there used to be this:
> http://www.openstreetmap.nl/coastlines.html where anyone could go and
> fix coastline errors that did show up on a purpose made mapnik layer.
> I see there is a geofabrik layer for that same purpos, but it is
> limited just to europe.
>
> Michal, are you aware of any such layer, but worldwide?

Simone

I use this  http://www.wightpaths.co.uk/coast/  . I generate the error 
points from the error points shapefile at http://metro.teczno.com/#coastline

My version is not as comprehensive as the old version at 
http://www.openstreetmap.nl/coastlines.html , since it only shows the error 
points.   I try and remember to look every couple of weeks to see if there 
are new extracts http://metro.teczno.com/, and then regenerate my error 
file.

David