[OSM-dev] [OSM-talk] Osmosis and large bounding polygons

[Jeremy Adams]

How did you go about editing the polygon?  I'd go through a edit it by hand 
if I knew of some way to do this efficiently.

Is there some way to get this converted into an .osm so I could edit with 
JOSM and then convert back?  I think it would take forever to try and do by 
hand.

-Jeremy

----- Original Message ----- 
From: "Martijn van Oosterhout" <kleptog at gmail.com>
To: "Frederik Ramm" <frederik at remote.org>
Cc: "OSM-Dev Openstreetmap" <dev at openstreetmap.org>
Sent: Wednesday, January 09, 2008 5:25 AM
Subject: Re: [OSM-dev] [OSM-talk] Osmosis and large bounding polygons


> On Jan 9, 2008 10:58 AM, Frederik Ramm <frederik at remote.org> wrote:
>> Sounds good, especially as I have the simplification code lying
>> around, in Java, somewhere; only thing that bugs me a bit is that
>> this would do the simplification every time you use the polygon which
>> strikes me as unneccessary. Haven't tried the 5 MB polygon people are
>> talking about, but I guess it will take some time for this to be
>> simplified.
>
> My question is: why is the polygon so complex? Yes, the
> northern/southern borders of the US might be a bit complex for some
> parts, but the east/west coast would be a few dozen segments at most.
> Australia I think you can do in maybe 50.
>
> The problem with automatically simplifying is that you don't know
> what's important. For example, when cutting out NL for the AND import
> it needed to be *exact*. But to have it done in a reasonable time
> someone simplfied the border in areas where there was *no data*. Also
> the entire coastline was replaced by 10 segments. That cut it down
> enourmously but is not something that can be automated.
>
> So maybe it could be an option but it would be better if people worked
> out whether the polygons really needed to be complex in the first
> place...
>
> Have a nice day,
> -- 
> Martijn van Oosterhout <kleptog at gmail.com> http://svana.org/kleptog/
>
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