[mkgmap-dev] [PATCH v5] sea polygons

Thu Aug 27 19:46:40 BST 2009

Christian Gawron schrieb:

> If anyone has a good idea how to handle an incomplete shoreline, please 
> let me know. Right know, it might be best to do the following:
> - get a country extract like germany.osm.bz2 from geofabrik,
> - calculate the boundary box,
> - use xapi or same other source to get the complete shoreline in this 
> boundary box,
> - mix in the shoreline using osmosis,
> - use the result as input for splitter and mkgmap.

so if I understand correct: a polygon cut of of the planet with
osmosis (like the geofabrik extract) is bad.

A bbox cut of the planet is better. And when using the
"completeWays" option of osmosis (Include all available nodes for
ways which have at least one node in the bounding box)
this should be even better?

and what about Chris Miller's suggestion the increase
the overlap area for the splitter. Has someone checked
if this gives better results or is it not needed ?

Chris