[mkgmap-dev] Splitter, mkgmap and polygons

Mon Mar 21 14:32:14 GMT 2011

On Mon, Mar 21, 2011 at 10:16:43AM -0400, Nakor wrote:
>A solution to the polygons in general could be to have the splitter 
>close the polygons properly at the boundary tiles instead of having 
>mkgmap try to guess where the polygon should be closed.

Right, but have the splitter close only those polygons which were closed 
in the first place.

>A step further would be to have splitter draw a polygon on the entire 
>tile border for multipolygon completly surrounding the tile.

Right. Possibly, have Osmosis close the polygons as well, so that the 
map extracts would be OK.

>This would for sure introduce "false" boundaries so those lines 
>probably would need to be marked in a special way so that mkgmap knows 
>to use them for determining which part of the tile is in which polygon 
>but not drawing them.

Right, but how would you identify only the false sections of the 
boundaries? Perhaps, by tagging the false nodes only? Currently, mkgmap 
does not join connected ways that are tagged with polygon tags.

	Marko