Re: [talk-au] Australian Coastline

2010-05-24 Thread John Smith
On 25 May 2010 09:28, Liz  wrote:
> Because I don't understand
> What are the disadvantages of using a relation?

relations that big often have side effects when software can't handle
it, even the OSM website itself times out when trying to show big
relations.

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Re: [talk-au] Australian Coastline

2010-05-24 Thread Liz
On Tue, 25 May 2010, John Smith wrote:
> On 24 May 2010 21:33, Markus  wrote:
> > the coastline from mgkmap creations. I thought it would be a good
> > exercise to see if relations will help.
> 
> Error checking doesn't seem to me to be a good idea to use relations,
> JOSM has a validation checker that should be used for this kind of
> thing.
> 
> > I also plan to add some coastline national parks that are split at the
> > coastline and plan to use the relations for checking my work.
> 
> Add a relation if you have a valid reason to use one, like sharing a
> boundary between sections of land based national park and marine park,
> but using a relation for error checking seems wrong to me.
> 

Because I don't understand
What are the disadvantages of using a relation?

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Re: [talk-au] Australian Coastline

2010-05-24 Thread John Smith
On 24 May 2010 21:33, Markus  wrote:
> the coastline from mgkmap creations. I thought it would be a good exercise
> to see if relations will help.

Error checking doesn't seem to me to be a good idea to use relations,
JOSM has a validation checker that should be used for this kind of
thing.

> I also plan to add some coastline national parks that are split at the
> coastline and plan to use the relations for checking my work.

Add a relation if you have a valid reason to use one, like sharing a
boundary between sections of land based national park and marine park,
but using a relation for error checking seems wrong to me.

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Re: [talk-au] Australian Coastline

2010-05-24 Thread Markus
The Coastline error checker doesn't appear to update very often. I have
found the coastline checker still displays errors that I fixed a month ago.

It also doesn't seem to always care about reversed coastline either. 

I use Mapsource with my garmin nuvi and it quite often has problems drawing
the coastline from mgkmap creations. I thought it would be a good exercise
to see if relations will help. 

I also plan to add some coastline national parks that are split at the
coastline and plan to use the relations for checking my work.

Markus.

 


-Original Message-
From: John Smith [mailto:deltafoxtrot...@gmail.com] 
Sent: Monday, 24 May 2010 9:36 AM
To: Markus
Cc: OSM Australian Talk List
Subject: Re: [talk-au] Austalian Coastline

On 24 May 2010 09:48, Markus  wrote:
> I thought it was about time someone linked the Australian coastline to
> relations.

Why do they need to be in a relation?

> I was amazed how many errors I needed to fix along the way including
> reversed coastline. You should now be seeing a purple line from South
> Australian boarder to the Northern Territory border.

Did you check to see if the coast line checker saw these errors?

http://wiki.openstreetmap.org/wiki/Coastline_error_checker
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