[mkgmap-dev] [PATCH V2] boundary preparer with quadtree

Wed Feb 8 18:06:56 GMT 2012

> Hi WanMil,
>
>
>  > Date: Wed, 8 Feb 2012 18:28:32 +0100
>  > From: wmgcnfg at web.de
>  > To: mkgmap-dev at lists.mkgmap.org.uk
>  > Subject: Re: [mkgmap-dev] [PATCH V2] boundary preparer with quadtree
>  >
>  > Hi Gerd,
>  >
>  > > Would you mind dropping the support for the old format ?
>  >
>  > No!
>  > Would it be a big deal to implement a converter?
>
> It is already implemented in the BoundaryPreparer when you execute its
> main().
> Also, I'll keep the code that writes the old format, because it is used
> before preparer starts.
> I just drop analysing the mkgmap:lies_in tags.
>
> Today I've written the code to read & write the new format and to
> recombine the boundaries.
> There are two open problems:
> a) Some boundaries with equal admin levels intersect, and
> BoundaryQuadtree.merge() removes the intersection from one of the both.
> This can cause different results compared to trunk because the
> LocationHook in trunk can sort
> them in different order. I think one cannot expect correct results for
> this case, but it makes
> testing difficult.

Is it possible to create a rule which boundary is preferred (e.g. with 
lower id)?

>
> b) The recombined boundaries have a few small holes, probably again the
> rounding error.
> I'll check this tomorrow.
>
> ciao,
> Gerd
>
>  >
>  > WanMil
>  >
>  >
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