[mkgmap-dev] [PATCH v1] sea polygons

Sun Aug 2 09:58:45 BST 2009

Dermot McNally schrieb:
> This exhausted the 2G of heap space I had allocated when I tried it on
> a map of Ireland. Are there known practical limits I should try to
> stay within?
>
> Dermot
>   
I'm afraid the reason is the code which joins the shoreline segments. 
The code constructs a new way when two ways are joined (because the 
shoreline may be used in other relations, e.g. a state border). This may 
use large amounts of memory.

The obvious optimization is to create a new way only when "original" 
ways are joined. I will post an optimized patch later.

Best wishes
Christian