[OSM-dev] coastline polygons

[Frederik Ramm]

Hi,

> Yes, I store data in postgresql and also export to shapefiles. Mapnik can read 
> both.  Why don't you try Mapnik? 

I'm sure I will, sooner or later. It's just that since I stumbled across 
this project about two months ago, there were so many other things that 
grabbed my attention ;-)

> The main reason for storing data separately is to make use of spatial analisys 
> tools (e.g JUMP). For the south-east of the UK I used original Shoreline data 
> and 'almien' coastlines from OSM planet. I found coastlines in OSM to have  
> lots of 'unclean' (e.g. self-intersecting)  geometries, probably because they 
> went through some line simplification algorithms I don't know... 

As far as the coastline data in OSM goes, I also found deficiencies with 
some of the Scottish sea lochs (they didn't go as far inlands as they 
ought to), and corrected them by hand in JOSM based on Yahoo imagery. 
That's why I was keen on the ability to do manual corrections.

> Me too. But it would make sense to have something to start with, IMHO

Sure, if only to make a better "first impression" for those looking at 
the slippy map...

Bye
Frederik

-- 
Frederik Ramm  ##  eMail frederik at remote.org  ##  N49°00.09' E008°23.33'