[mkgmap-dev] wrong mdr25 and mdr27 data in global index?

Mon Jul 30 16:04:58 BST 2018

Hi Ticker,

I think MapSource / Basecamp ignore both indexes. I've tried with a modified mkgmap which creates empty sections
and did not see any change. It's not really important because the indexes are small and the computation needs not
much time. I am not so sure reg. mdr25. MapSource creates it when it generates a Gmapsupp, so maybe some devices
use it for the search of city POI.

Gerd

________________________________________
Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Ticker Berkin <rwb-mkgmap at jagit.co.uk>
Gesendet: Montag, 30. Juli 2018 16:01
An: Development list for mkgmap
Betreff: Re: [mkgmap-dev] wrong mdr25 and mdr27 data in global index?

Hi Gerd

I generated it with mkmap --gmapsupp

Using --tdbfile and running MdrCheck on osmmap_mdr.img

mdr5: the reg= ohave values that correspond to the counties (in mdr26).
mdr25: identical output to mdr in gmapsupp
mdr27: is generate and I get a few errors about duplicated cities

I don't have a particular problem with anything but was wondering about
the Region/Country confusion.

Ticker

On Mon, 2018-07-30 at 11:17 +0000, Gerd Petermann wrote:
> Hi Ticker,
>
> I think you can ignore the errors reg. no name. How did you create
> the gmapsupp? With mkgmap or with a Garmin program?
>
> Mkgmap writes the Mdr27 index only for the PC index, not for the
> gmapsupp index.
>
> Gerd
>
> ________________________________________
> Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag
> von Ticker Berkin <rwb-mkgmap at jagit.co.uk>
> Gesendet: Montag, 30. Juli 2018 12:40
> An: Development list for mkgmap
> Betreff: Re: [mkgmap-dev] wrong mdr25 and mdr27 data in global index?
>
> Hi
>
> Just been having a quick look at this area. My "Find Address" has
> only
> has input for "Region", "City", "Number" & "Street Name". The
> "Region"
> options are the Countries in my map, with "United Kingdom" pre
> -selected. It seems to work OK - changing the region to another
> country
> gives cities in that country.
>
> Doing MdrCheck I see a few strange things.
>  At start:
> # reading 74210001
> ERROR: map 1: city 1: no name; index 1
> ERROR: map 1: city 2: no name; index 2
>
>  In mdr5 section, all have reg=0, despite having different counties:
> 1 map1; ABBOTS WORTHY mapCity=3 reg=0 (HAMPSHIRE) country=0 (UNITED
> KINGDOM^]GBR) ind20=0 rep=false
> 20 map1; ASHEY mapCity=24 reg=0 (ISLE OF WIGHT) country=0 (UNITED
> KINGDOM^]GBR) ind20=0 rep=false
>
>  mdr25 check - doesn't give any errors and looks reasonable
>
>  mdr27 check - gives
> section is empty
>
> This is based on a GMAPSUPP containing a single tile in the map and
> taking the MDR from this GMAPSUPP
>
> Ticker
>
>
> On Sat, 2018-07-28 at 06:58 +0000, Gerd Petermann wrote:
> > Hi,
> >
> > while looking at my problem with restaurant POI I noticed that
> > MdrCheck complains about the MDR27 in the index created by mkgmap
> > (Cities sorted by region)
> >
> > The check complains (correctly) about duplicate entries in this
> > index. We have a similar index in MDR25 (Cities sorted by country).
> >
> > For MDR27 the current code in mkgmap doesn't remove any duplicates,
> > for MDR25 it removes duplicate entries when
> > the combination of city name, region name and country name is
> > repeated, no matter in how many different tiles the combination
> > appears.
> >
> > On the other hand, MdrCheck only complains when the 3 names are
> > equal
> > AND two subsequent entries in the index point to the same tile.
> >
> > So, if I got that right we may have to few entries in MDR25, and
> > for
> > sure we have too many in MDR27. My problem:
> > I did not find a difference when I changed the code, it seems that
> > both my Oregon and the PC software seems to ignore these 2 indexes.
> >
> > Maybe older software/firmware versions used these indexes?
> >
> > Gerd
> > _______________________________________________
> > mkgmap-dev mailing list
> > mkgmap-dev at lists.mkgmap.org.uk
> > http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
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