[mkgmap-dev] Error in mkgmap r-3676, wrong preview generation

Sun Jul 3 08:40:09 BST 2016

Hi Thomas,

okay, I'll dig into this during the next days. My understanding so far

is that the ovm_*.img tiles do not contain 0x4a polygons and that the

code adds just one 0x4a polygon for the overview map. Maybe this is split

into pieces because some size limits are reached...

Gerd

________________________________
Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Thomas Morgenstern <webmaster at img2ms.de>
Gesendet: Sonntag, 3. Juli 2016 06:15:54
An: Development list for mkgmap
Betreff: Re: [mkgmap-dev] Error in mkgmap r-3676, wrong preview generation

Hi Gerd,

please make a really solution of the error or untouch the code. No error
mesasage ! Maybee a error message prevent mkgmap to create the _mdr.ing.
I use a workaround with cgpsmapper to create the preview.img. I am
angry, that my workaround wil lnot longer work, if mkgamp gives me error
message.thank you.
thomas

by the way... : the problem is: mkgmap creates many 0x4a for one
maptile. it should creates only one 0x4a with the tile-boundaries, like
in the corrresponding tdb. Maybee is the solution, to use the same
algorythmus for writing 0x4a in preview like in tdb ?

Am 01.07.2016 um 10:57 schrieb Gerd Petermann:
> Hi,
>
> I am back from a nice cycle trip to Sicilia. I did not yet investigate the problem in detail,
> but I can for sure say that I did not think about this situation when I wrote the code for the
> overview map creation.
> If nobody claims that mkgmap should support this I would also prefer to print an error
> message and stop processing.
>
> Gerd
>
>
>
> ________________________________________
> Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Steve Ratcliffe <steve at parabola.me.uk>
> Gesendet: Samstag, 18. Juni 2016 18:19
> An: mkgmap-dev at lists.mkgmap.org.uk
> Betreff: Re: [mkgmap-dev] Error in mkgmap r-3676, wrong preview generation
>
> Hi
>
> An update on the problem.
>
> The contour line tiles have the levels 0:24,1:23,2:22,3:20,4:18
> whereas the content tiles have levels of 0:24,1:22,2:20,3:18,4:16,5:15
>
> The first tile encountered determines the levels in the overview map
> and so the overview maps are different.  It is surely a bug that the
> map outlines are wrong and so I will look at this next.
>
> However I am not sure what the full solution is though as there are
> other noticable problems, as the overview map is going to be wrong for
> one set of tiles whatever is done.  Perhaps mixing tiles with
> different levels should not be allowed?
>
> ..Steve
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