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[mkgmap-dev] [PATCH v3] sea polygons

From Christian Gawron christian.gawron at gmx.de on Sun Aug 9 14:20:14 BST 2009

Dear Dermot,

the "triangle artifacts" have to do with the multipolygon code.
There is a comment by someone saying
        //with this line commented we get triangles, when uncommented 
some areas disappear
        // at least in mapsource, on device itself looks OK.
The multiploygon code "connects" the inner ways with the outer way by 
two additional ways. These should in theory be two identical ways of 
opposite direction, but it seems that something breaks in the display on 
the device unless these ways differ slightly. The "slight difference" 
shows up as triangles ...

I'm still searching the cause of the "flooded islands" ...

Best wishes

Dermot McNally schrieb:
> OK, I've located a flooded island, I've grabbed a screenshot to
> illustrate the artefacts I described in my last mail. This is all
> fairly tolerable stuff, so I'm going to keep using the patched
> version.
> Dermot
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