Hi NopMap,
please post the complete list of mkgmap options to make it easier to reproduce
the problem.
The default style contains this line:
natural=sea { add mkgmap:skipSizeFilter=true; set mkgmap:drawLevel=2 } [0x32
resolution 10]
which in fact tells mkgmap to skip the size filter for the polygons generated
by precomp-sea.
Gerd
________________________________________
Von: mkgmap-dev <[email protected]> im Auftrag von NopMap
<[email protected]>
Gesendet: Samstag, 18. Februar 2017 12:29:06
An: [email protected]
Betreff: Re: [mkgmap-dev] Terraced/pixellated coastline with --precomp-sea
After playing around some more I think I found the reason for the problem. It
appears that there is a conflict between the --min-size-polygon= parameter
and sea generation from the precompiled files.
For larger Values of --min-size-polygon, the tearracing becomes worse. For
smaller values it becomes better. It seems that the generated sea polygons
are filtered one at a time by --min-size-polygon.
Which is probably a bug. With the default setting for --generate-sea or an
explicit --generate-sea=multipolygon, the sea is supposed to be generated as
a multipolygon. It does not make sense to filter out individual parts of a
multipolygon. Multipolygons on land are treated as a whole, and the same
should be true for generated sea polys.
But it looks like the --precomp-sea option creates many individual sea
polygons, not a multipolygon as described in the documentation.
I think the simple solution would be to not apply the --min-size-polygon
filter to generated sea at all. A coastline multipolygon usually extends
over large parts of the map, so it would be never filtered.
--
View this message in context:
http://gis.19327.n8.nabble.com/Terraced-pixellated-coastline-with-precomp-sea-tp5891553p5891560.html
Sent from the Mkgmap Development mailing list archive at Nabble.com.
_______________________________________________
mkgmap-dev mailing list
[email protected]
http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
_______________________________________________
mkgmap-dev mailing list
[email protected]
http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
