[OSM-talk] Slippy map - Mapnik layer UK coastlines

Artem Pavlenko artem at mapnik.org
Mon Mar 26 16:41:04 BST 2007


Steve,

So far I was running database and all tools locally.  I'll try to  
setup something on dev plus wiki howto so everyone could have a go.  
Are you on IRC at all tonight ?

Cheers,
Artem


On 26 Mar 2007, at 14:39, Steve Chilton wrote:

> Artem,
>
> Can you explain what is possible/required (step-wise), somewhere in  
> wiki?
> I am willing to particpate in the work if it is something I can  
> encompass.
>
> Cheers
> STEVE
> Steve Chilton, Learning Support Fellow
> Learning and Technical Support Unit Manager
> School of Health and Social Sciences
> Middlesex University
> phone/fax: 020 8411 5355
> email: steve8 at mdx.ac.uk
>
> Chair of the Society of Cartographers:
> http://www.soc.org.uk/
> Mind the (Map) Gap:
> http://news.bbc.co.uk/1/hi/magazine/5413010.stm
>
> -----Original Message-----
> From: talk-bounces at openstreetmap.org [mailto:talk- 
> bounces at openstreetmap.org] On Behalf Of Artem Pavlenko
> Sent: Friday, March 23, 2007 1:49 PM
> To: David Groom
> Cc: talk at openstreetmap.org
> Subject: Re: [OSM-talk] Slippy map - Mapnik layer UK coastlines
>
> Hi David,
>
> On 23 Mar 2007, at 11:48, David Groom wrote:
>
>> It seems that the UK coastline is beginning to render better in  
>> the Mapnik
>> layer of the slippy map (it's a solid blue fill, rather than the  
>> odd shaped
>> grey polygons).
>>
>> However it does appear that the source for the coastline might be  
>> a rather
>> out of date planet file.
>>
>> In some places, eg
>> http://www.openstreetmap.org/index.html? 
>> lat=50.85383936185782&lon=-1.315713476905844&zoom=15
>> ,there is an exact correlation between coastline which is shown in  
>> the
>> Mapnik and Osmarender layers.
>>
>> In other places eg ,
>> http://www.openstreetmap.org/index.html? 
>> lat=50.81094579389664&lon=-0.09869895092239864&zoom=15
>> ,the coastline outline in the Osmarender layer seems to be much  
>> more recent
>> than the Mapnik layer.
>>
>
> For most of the world I was using original shoreline data, hence  
> it's not as smooth as it should. Polygons are only available for  
> England and Wales, the rest gets blue shoreline lines.  To have  
> proper polygons for the whole planet :
>
> 1. We need to agree that storing countries boundaries as polygons  
> is way forward.
>
> 2. We have to decide if storing these polygons in main OSM database  
> is a good idea or not. I personally think it'll be better to store  
> them separately.
>
> 3. Start creating polygons. I have all the tools and I'm happy to  
> help anyone, but it is a big task which requires community  
> participation.
>  On the other hand, If one person capable of fixing most of the UK  
> coastline it should be peanuts for OSM as a whole. If you want to  
> see nice blue sea and land just do it, don't wait!
>
>  Cheers,
> Artem
>
>> David
>>
>>
>>
>> _______________________________________________
>> talk mailing list
>> talk at openstreetmap.org
>> http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
>>
>
> Artem Pavlenko
> http://mapnik.org
>
>
>

Artem Pavlenko
http://mapnik.org



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