[OSM-talk] Simplify ways within a '.osm'

Karl Newman siliconfiend at gmail.com
Fri Jun 20 05:58:14 BST 2008


On Thu, Jun 19, 2008 at 6:55 PM, <simon at mungewell.org> wrote:

> Hi all,
> Does anyone have any solutions to auto-magically simplify the ways with an
> '.osm' file? I am looking at simplifying both to ease rendering and also
> to reduce the overall size of the file, prior to converting to a
> downloadable GPS map.
>
> GPS-babel was suggested on the IRC as it now supports '.osm', however the
> simplify option does not respect shared nodes, where ways intersect.
>
> Obviously for maps we don't want to be adjust these....
>
> It also strips all of the tags it does not understand, so the map would
> lose all of it's mapness and become a collection of blank ways.
>
> Any thoughts?
> Simon.
>

I think JOSM has a simplify ways function. It might be in one of the
plugins; not sure. If you're planning to use cgpsmapper to compile the maps,
it already has a built-in simplification algorithm. You just need to enable
it in the .mp file (and I think it's on by default anyway).

Karl
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