[talk-au] Australian Coastline

[Markus]

Are you meaning the horizontal line half way between Vic and Tas in bass
straight? If it is it is the state border between the two not the maritime
boarder.

 

I am currently tidying the existing maritime boarder to correctly render
with mgkmap and mapnik using osm rules for maritime boarders. It doesn't
seem to need the baseline I was talking about originally. 

 

The line around the coast is the 12nm zone that we now can see.

 

http://www.ga.gov.au/oceans/mc_amb-bndrs.jsp

 

http://wiki.openstreetmap.org/wiki/Proposed_features/Maritime_borders

 

If I have made a mistake interpreting it let me know.

 

Markus

 

 

  _____  

From: talk-au-bounces at openstreetmap.org
[mailto:talk-au-bounces at openstreetmap.org] On Behalf Of Leon Kernan
Sent: Monday, 21 June 2010 9:43 PM
To: OSM Australian Talk List
Subject: Re: [talk-au] Australian Coastline

 

There seems to be an unintended side effect to this statement:
> The maritime borders are 12nm out to sea from the coastline.
  
Bass Strait seems to have been given over to international waters according
to that statement.  
There are some weird lines around Vic / Tas and the Bass Strait islands at
the moment on zoom level 7 which i assume are linked to this converstation.





On Tue, May 25, 2010 at 8:35 PM, John Smith <deltafoxtrot256 at gmail.com>
wrote:

On 25 May 2010 20:28, Markus <markus_g at bigpond.com> wrote:
> You still haven't explained how to check the whole coastline is joined
with
> JOSM. You mensioned JOSM has a validation checker that should be used for
> this kind of thing.

Click to display the validation plugin panel or press Alt+Shift+V then
click on the validate button, make sure nothing is selected or only
the selection with be validated, you could make things a little more
specific by first searching for natural=coastline segments.


> The renders I create for Garmin Mapsource has problems if the coastline
> isn't joined.

So does mapnik, but they cheated to get round most problems by
creating a shape file first.


> The 2000 node limit for polygons is documented to be over come by using a
> relation.

Which was made redundent by creating shape files from the coastline
segments before relations existed, although this is probably still a
lot more useful.


> The maritime borders are 12nm out to sea from the coastline. See below
link.

Yes, but coastlines should be much less nodes otherwise you start
hitting problems similar to those in the Philippines...


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