[mkgmap-dev] Sea Detection

Tue Nov 9 09:02:10 GMT 2010

Am 09.11.2010 09:56, schrieb charlie at cferrero.net:

>> 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.

> 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).

I'm using generate-sea=extend-sea-sectors.

Chris