[mkgmap-dev] Commit: r1449: Provide an alternative to using a multipolygon when generating the sea.

Thu Dec 31 13:56:57 GMT 2009

On 31.12.2009 13:00, svn commit wrote:
> Version 1449 was commited by markb on 2009-12-31 12:00:01 +0000 (Thu, 31 Dec 2009)
>
> Provide an alternative to using a multipolygon when generating the sea.
>
> The --generate-sea option can now take a comma separated list of values:
>
> multipolygon - generate the sea using a multipolygon (the default
> behaviour so this really doesn't need to be specified).
>
> polygons | no-mp - don't generate the sea using a multipolygon - instead,
> generate a background sea polygon plus individual land polygons with
> tag natural=land. This requires a suitable land polygon type to be defined
> in the style file (suggested type is 0x010100) and the polygon must be
> defined in the TYP file as having a higher drawing level than the sea
> polygon type.
>
> no-sea-sectors - disable the generation of "sea sectors" when the
> coastline fails to reach the tile's boundary.
>
> An unrecognised option value or the value "help" will cause some help
> blurb to be printed.
>
> For backwards compatibility, with no values specified, the --generate-sea
> option should behave as it did before.
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>    
Even though I do think that this is similar to v3 patch I'll answer here.
I just tried compiling Denmark from geofabrik to see how well this new 
--generate-sea=polygons works.

It worked in 12/13 tiles. See below the broken tile where no 0x10f1d 
polygon for the sea (as defined in polygons file) got created at all, 
furthermore 1 island is flooded (in the center of the tile). I used grey 
as backround color so one can easily spot mistakes.

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