[mkgmap-dev] [PATCH v4] Precompiled sea

Thu May 17 20:30:56 BST 2012

Hi WanMil,
I don't know if you heard about it. Jochen Topf developed a tool called 
osmcoastline, which creates sea polygons very quickly from planetextract 
etc.

http://www.mail-archive.com/dev@openstreetmap.org/msg16846.html

Maybe you can integrate something from this? 20 minutes for hole planet 
sounds very nice.

Henning