[mkgmap-dev] Wrong "Object Class" displayed in Mapsource

Thu Apr 18 07:11:51 BST 2013

Hi Michael,

I think the background polygon is missing. Please check: Do you use the --transparent option?
If yes: Older versions of mkgmap did not always create transparent maps with this switch.
See also here:
http://gis.19327.n5.nabble.com/locator-rules-and-transparent-maps-tp5740571.html

Gerd

> Date: Thu, 18 Apr 2013 00:54:36 +0200
> From: mipri at gmx.net
> To: mkgmap-dev at lists.mkgmap.org.uk
> Subject: Re: [mkgmap-dev] Wrong "Object Class" displayed in Mapsource
> 
> 
> Gerd Petermann schrieb:
> 
> Hello Gerd,
> 
> thank you for your answer.
> 
>  > The problem regarding the change between 0x4b and 0x0b was
>  > in mkgmap routines that read the img file, none of them would
>  > explain what you see.
>  > Maybe Mapsource makes a similar error?
> 
> Meanwhile I've looked a bit deeper into it, and I found two issues:
> 
> 1.) I found the wrong Object Classes in Mapsource when I was examining a 
> change in the background polygon of my map. Up to some version of mkgmap 
> it used to be light gray at day and almost black at night. There was no 
> label at all displayed in Mapsource when the mouse was moved to this 
> background.
> 
> In my actual map, the background color changed to light yellow. I don't 
> know the exact version of mkgmap when this happened, but now Mapsource 
> displays it as "Unbekanntes Gebiet" ("unknown area"), and with this, the 
> category "Krankenhaus" ("Hospital") appeared.
> 
> My TYP file contains two background polygons, one with ID 0x4a (the 
> gray/black one), and another with ID 0x4b (the yellow one). It looks 
> like if earlier versions of mkgmap used 0x4a for the background, while 
> newer versions use 0x4b. Is this correct?
> 
> The Online TYP Editor at ati.land.cz labels these polygons as
> "0x4a [Background (selection)]" and "0x4b [Background (coverage)]". What 
> is the difference between these two?
> 
> There is no label defined in my TYP file, neither for 0x4a nor for 0x4b. 
> Mapsource seems to display a label only for 0x4b. Of course I could set 
> my own label instead of "Unbekanntes Gebiet", but is it also possible to 
> have no label at all also for 0x4b, and how can I do this?
> 
> And finally: I've installed the "All in One Garmin Map" in Mapsource. 
> Here the background is labeled correctly as "Kartenmerkmal - Land" (and 
> not as "Hospital"). I've looked into the corresponding TYP file and 
> found the background being defined as ID 0x27. How is it possible to 
> assign a own ID other than 0x4b to the background?
> 
> 
> 2.) To be sure that the wrong Object Classes in Mapsource are not caused 
> by anything in my map, I've saved the OSM data for my "test area" with 
> JOSM and created a new map without an own style and also without a TYP 
> file. I even omitted the --add-pois-to-areas parameter. Of course the 
> resulting map contains much less POIs than my map, and most of them are 
> labeled correctly. But even in this map there are wrong Object Classes, 
> for example for woods as shown in http://www.mipri.de/dl/wood2.png 
> ("Autoservices" is wrong).
> 
> If this really is a bug in Mapsource, these wrong Object Classes should 
> also show up in original Garmin maps. Unfortunately, I don't own such a 
> map. Has anybody seen these wrong labels in a original map from Garmin? 
> Or has someone managed to build a map with mkgmap that shows correct 
> labels in Mapsource? Or is in the end my individual installation od 
> Mapsource broken? I am using 6.16.3, if this matters.
> 
> On the GPS indeed anything seems to be ok. For example I could not find 
> anything other than hospitals it I am doing a POI search for hospitals, 
> and there are no woods listed it I am searching for car services.
> 
> 
> Thank your for your answers,
> 
> Michael
> 
> 
> 
> 
> >> Date: Fri, 5 Apr 2013 23:50:42 +0200
> >> From: email at mipri.de
> >> To: mkgmap-dev at lists.mkgmap.org.uk
> >> Subject: [mkgmap-dev] Wrong "Object Class" displayed in Mapsource
> >>
> >>
> >> Hello,
> >>
> >> I am creating my own map with mkgmap and am using it on an eTrex Vista
> >> HCx and with Mapsource.
> >>
> >> In Mapsource, when the mouse pointer is moved over an object (like a
> >> road, a building or another POI) and the right mouse button is pressed,
> >> a context menu appears listing anything under the pointer.
> >>
> >> If there is no other polygon (like forest, residential, ...) than the
> >> "empty" background under the mouse pointer, Mapsource lists the
> >> background as "Hospital". Please see
> >> http://www.mipri.de/dl/background.png for an example.
> >> "Kartenmerkmal - Straße" is correct, but "Krankenhaus - Unbekanntes
> >> Gebiet" ("Hospital - Unknown area") is not.
> >>
> >> In my TYP file I am using 0x4b for the background, while my style (like
> >> the default style) is assigning 0x0b to hospitals. I don't know if there
> >> is any relation, but some days ago Gerd wrote:
> >>
> >>   > the code changed the background type 0x4b to 0x0b. I find this
> >>   > also in the trunk version and in the current code of the display
> >>   > tool, so I am not sure why this happens.
> >>
> >> Could it have to do with this?
> >>
> >>
> >> There are other cases where the labels in Mapsource are wrong:
> >>
> >> If I am putting the mouse over a "real" hospital, the building gets
> >> listed as "Marine", see http://www.mipri.de/dl/hospital.png. In this
> >> case "Krankenhaus - Chirurgische Klinik" is correct,
> >> "Marine - Chrirurgische Klinik" is not.
> >>
> >> Something similar happens with forests, but only if there is no "wood"
> >> key defined. In this case, they are listed as "Autoservices - Wald"
> >> ("Car repair - Forest") as in http://www.mipri.de/dl/wood.png.
> >>
> >> The examples were taken near the University of Ulm, Germany, but it
> >> could be elsewhere. The mouse pointer did not get captured in my
> >> screenshots, it was at the position in the upper left corner of the
> >> popup menu.
> >>
> >> These wrong labels seem to appear only in Mapsource, I did not see them
> >> on my GPS yet.
> >>
> >> Any ideas what could be going wrong here?
> >>
> >>
> >> Thanks,
> >>
> >> Michael
> >>
> >>
> >>
> >> _______________________________________________
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> >> mkgmap-dev at lists.mkgmap.org.uk
> >> http://lists.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
> >   		 	   		
> >
> >
> >
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> 
> 
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