[mkgmap-dev] MDR 9 & 10 groups

Tue Apr 16 17:13:02 BST 2019

Hi

I was wrong - MDR 9 & 10 are correct regardless of the out-of-order
0x28/group 9.

Sorry wasting your time.

Ticker 

On Tue, 2019-04-16 at 11:50 +0100, Ticker Berkin wrote:
> Hi Gerd & Steve
> 
> When I was running with a small example it seemed that the MDR9 was
> written in group order, each with start record to MDR10 that is
> calculated on the assumption that MDR10 was also generated in the
> same
> group order. However the step in MDR10 caused by a single 0x28/group
> 9
> POI appeared incorrect.
> 
> Now, with a real map, I'm having trouble working out what is going on
> and it might be correct. I need to check more carefully. 
> 
> I thought LinkedHashMap did preserve an order.
> 
> Regards
> Ticker
> 
> On Tue, 2019-04-16 at 05:46 +0000, Gerd Petermann wrote:
> > Hi Ticker,
> > 
> > I also don't know what 0x28 is, but you are probably right that the
> > code is wrong. A change from
> > LinkedHashMap to TreeMap for field index in MDR9 should fix this,
> > right?
> > 
> > Gerd
> > 
> > ________________________________________
> > Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag
> > von Steve Ratcliffe <steve at parabola.me.uk>
> > Gesendet: Montag, 15. April 2019 23:12
> > An: mkgmap-dev at lists.mkgmap.org.uk
> > Betreff: Re: [mkgmap-dev] MDR 9 & 10 groups
> > 
> > 
> > Hi Ticker
> > 
> > > So, the first question is, does anyone know why 0x28 was given
> > > it's
> > > own
> > > group.
> > 
> > I've no idea why, but that is the way it is as far as I could
> > determine.
> > 
> > > The second problem is that the code that builds up the group
> > > start
> > > indexes into Mdr10 for Mdr9 assumes that the type ranges of the
> > > POI
> > > allocated for a group are in the same order as the groups, so, if
> > > you
> > > actually have a POI of type 0x28 then, because it has a lower
> > > type
> > > but
> > > a higher group than the 0x2a..30 range/groups, mdr9 is wrong.
> > 
> > I don't see where that happens but that would be wrong and mdr9
> > should be ordered by group.
> > 
> > Cheers
> > Steve
> > _______________________________________________
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