[mkgmap-dev] overview2 branch -- sea not rendered at resolution 12

Wed May 8 12:41:52 BST 2013

On 08.05.2013 02:15, Gerd Petermann wrote:
> Hi all,
>
> >
> > Well, I first thought it would be a Mapsource/Basecamp bug, but 
> actually
> > mkgmap overview2 is not rendering the sea tiles down to resolution 12.
> > The lowest resolution working is resolution 14... -- at 13 some sea is
> > rendered, at 12 no sea at all is rendered. I think unlike in my earlier
> > reply to Henning - that this is some internal bug (maybe related to 
> that
> > before 13 was the resolution of the overview map)
>
> I assume the polygons generated by SeaGenerator are too small, means, 
> they are all filtered
> in the low resolution levels. Maybe we can implement a merge-polygons 
> function to solve this
> problem. Anyway, this is probably not directly related to the overview 
> stuff.
that's what I first thought too. But then I looked at a map created with 
the same settings using the old overview2 branch (before multiple 
levels) - which was done at resolution 13. And there no sea at all was 
missing - while now at 13 it is mostly gone. So I guessed that there 
must be some other problem...
>
> >
> > Else I really think that the branch can be merged. It is really working
> > well now... - and I played around a lot with it.
>
> :-)
> Please post a diff for the default style (or a zip file containing all 
> files). I do not fully
> understand the changes.
>
> > Only other thing is maybe to have an option to delete / not delete the
> > ovm*.img files after creation.
>
> Yes, I think an option is ok. I prefer to have the files as it helps 
> debugging.
>
> >
> > Resolution 12 is great for continent maps like Europe (not fully needed
> > - 14 could do), or Asia (13 is a must, 12 would be much better).
>
> Please place that knowledge as a comment in the style options file.
> Maybe you can also add something to the doc files?
>
> Gerd
>
>
>
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