[mkgmap-dev] Sea Detection

Tue Nov 9 08:56:31 GMT 2010

Chris66 (chris66nrw at gmx.de) wrote:

> Hi,
> I created a map of a cutout of the europe geofabrik extract
> including generate sea option.
>
> All is OK, but one tile is white instead of blue because
> it's completely in the sea and contains no coastline.
>
> How to detect such tiles?
>
> I think this is easy: It contains no or very few
> data (only some ferry lines).
>
> An option for detecting such sea tiles and filling
> with a sea polygon would be nice.
>
> Christian

I'm sure there is an sub-option to --generate-sea that created sea  
tiles like this.  I think it might be extend-sea-sectors.  You might  
have to use the polygons version of generate-sea for it to work though  
(at least, I don't use mp version of generate-sea so I don't know  
either way).

--
Charlie