[mkgmap-dev] [PATCH] Reduce the resolution of natural=coastline

Fri Mar 5 11:40:37 GMT 2010

On Fri, Mar 05, 2010 at 12:16:46PM +0100, Felix Hartmann wrote:
> Well for me any lake marked with natural=coastline is plain wrong. Just 
> people mapping for the renderers.

Yes, but some controversy arised when I converted Saimaa
(the biggest lake of Finland) to a number of multipolygons.
It was simply too big (thousands of ways) for a single multipolygon,
and even as it is now, Osmarender and OpenCycleMap are having trouble,
especially around Kuopio.

> A better solution would be, to simply have higher limits of how big a 
> polygon needs to be at a certain resolution. As well as the DP filter 
> aggressiveness, at resolutions lower than 20, we would need more 
> aggressive dropping of small polygons.
> Dropping coastline already at 18, is superstrange if one is using 
> --generate-sea=polygons.

Agreed, it would be nice to see all big lakes at resolution 12.  Could
tuning the DP filter help realize that?

	Marko