[mkgmap-dev] dem-poly and precomp-sea

Wed Jan 10 09:46:04 GMT 2018

El 10/01/18 a las 09:54, Gerd Petermann escribió:
> Hi all,
>
> I think that the bounding polygon given with option --dem-poly should be also be used in the precomp-sea option,
> so that mkgmap doesn't generate sea polygons outside of the bounding polygon. With the current code a map of e.g.
> scandinavia looks strange, see attached picture.
I think that could also lead to stranger results, see attached 
screenshots, one from JOSM showing my spain.poly and other one from 
MapSource showing resulting map. I would prefer to show sea as currently 
rather than cut by spain.poly. Anyway, that could be an option, the same 
than currently we have --no-trim in splitter to get right the opposite 
effect.
>
> In a further step I should try to use that polygon also for the background polygon (0x4B) and other data.
> In a final step we might be able to use it for routing data so that you can split maps at left-driving / right-driving boundaries,
> but that needs more thinking.
Splitting maps at left/right driving boundaries or country boundaries 
would really be a great improvement.
>
> I've not coded anything yet, but I wonder if the option should be changed from dem-poly to e.g. --polygon-file or --bounding-polygon.
>
> Gerd
>

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