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#1 2017-11-29 19:19:56

Todd R1949
Member
Registered: 2016-09-25
Posts: 7

The latest GMAPSUPP.IMG for Ontario, Canada causes problems

Both the generic routable and generic.new routable for 2017-11-23 cause my Garmin Nuvi 56LM to crash and shutdown when I include the GMAPSUPP.IMG files from either on the microSD card. This is for the Garmin OSM for Ontario, Canada. When I revert to the internally stored GMAPSUPP.IMG, everything works fine and routing is fully functional. When I try to choose a route with the Garmin OSM map, the GPS completely shuts down when trying to build the route.

Workaround for now is to use the internal GMAPSUPP.IMG despite the fact it is really outdated right from Garmin.

Any suggestions for solutions would be greatly appreciated.

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#2 2017-11-30 17:20:15

ligfietser
Moderator
Registered: 2008-10-09
Posts: 4,645
Website

Re: The latest GMAPSUPP.IMG for Ontario, Canada causes problems

You can try to create a gmapsupp with Basecamp's Mapinstall or Mapsource instead of the premade version?

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#3 2017-12-01 00:37:17

Todd R1949
Member
Registered: 2016-09-25
Posts: 7

Re: The latest GMAPSUPP.IMG for Ontario, Canada causes problems

LIGFIETSER - That seems to have worked. I created a gmapsupp file for Ontario, Canada from an extracted OSM file and it worked ok in my Garmin Nuvi 56LM. So question... when I download the next updated file from Garmin OSM, will it still be corrupted and cause my GPS to crash, or will it be corrected ?

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#4 2017-12-01 08:42:02

ligfietser
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Registered: 2008-10-09
Posts: 4,645
Website

Re: The latest GMAPSUPP.IMG for Ontario, Canada causes problems

Glad to hear this workaround solves your issue. Because the gmapsupp is generated with experimental software (mkgmap) it is very likely that next updates also cause crashes I'm afraid.

Apparently, Mapsource or Basecamp can filter those glitches out of the map when writing the data to your device.  Unfortunately Garmin will not reveal its source code so the mkgmap engineers have to programm those maps by trial and error so it is unknown when or if those errors can be fixed.

Last edited by ligfietser (2017-12-01 11:44:54)

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#5 2017-12-04 15:30:41

Todd R1949
Member
Registered: 2016-09-25
Posts: 7

Re: The latest GMAPSUPP.IMG for Ontario, Canada causes problems

UPDATE:  I just tried the updated GMAPSUPP downloaded file from Garmin OSM for Ontario, Canada and it caused my Garmin NUVI 56LM to crash again. So, now I either use the internal GMAPSUPP file as supplied quarterly by Garmin, or I use the convoluted process as outlined by LIGFIETSER to create my own GMAPSUPP files from OSM using splitter/mkgmap. I have no idea what changes have been made within Garmin OSM but the previous useable GMAPSUPP download file is no longer available for my Garmin NUVI 56LM.

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#6 2017-12-04 18:25:27

GerdP
Member
Registered: 2015-12-18
Posts: 182

Re: The latest GMAPSUPP.IMG for Ontario, Canada causes problems

Hi Ligfietser,
if I got that right mkgmap produces a gmapsupp that is incorrect. I think this should be corrected. Do you know the parameters used to create the tiles and to create the gmapsupp?

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#7 2017-12-05 09:05:11

ligfietser
Moderator
Registered: 2008-10-09
Posts: 4,645
Website

Re: The latest GMAPSUPP.IMG for Ontario, Canada causes problems

Hi Gerd, the parameters that Lambertus uses are here: https://github.com/ligfietser/mkgmap-style-sheets
I don't know how he splitted the tiles.

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#8 2017-12-05 09:07:27

Todd R1949
Member
Registered: 2016-09-25
Posts: 7

Re: The latest GMAPSUPP.IMG for Ontario, Canada causes problems

LIGFIETSER - to further detail the problem with the GMAPSUPP generated by Garmin OSM for my Nuvi 56LM, it has something to do with routing, because the map itself does not cause the gps to crash, it's when it tries to calculate a route when it crashes. The map itself is viewable and useable by the gps and does not cause it to crash.

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#9 2017-12-05 10:17:41

ligfietser
Moderator
Registered: 2008-10-09
Posts: 4,645
Website

Re: The latest GMAPSUPP.IMG for Ontario, Canada causes problems

Todd, which map does not crash, you've mentioned the one that you have compiled yourself with mkgmap. How about one that you have send from the pc to your device with Basecamp's Mapinstall?

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#10 2017-12-05 11:44:55

Todd R1949
Member
Registered: 2016-09-25
Posts: 7

Re: The latest GMAPSUPP.IMG for Ontario, Canada causes problems

LIGFIETSER - I followed the directions as outlined in  http://www.cferrero.net/garmin_howto.html 
and the resultant GMAPSUPP worked ok in my gps. The one downloaded directly from Garmin OSM causes the gps to shutdown when I try to route. I have not done anything related to Basecamp. I hope this helps.

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#11 2017-12-05 12:12:36

GerdP
Member
Registered: 2015-12-18
Posts: 182

Re: The latest GMAPSUPP.IMG for Ontario, Canada causes problems

Todd, does that mean that your device crashed with a map published by Garmin? Or what is meant by "The one downloaded directly from Garmin OSM "? Maybe you have a link?

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#12 2017-12-05 12:24:01

ligfietser
Moderator
Registered: 2008-10-09
Posts: 4,645
Website

Re: The latest GMAPSUPP.IMG for Ontario, Canada causes problems

Gerd, he mentioned generic routable and generic.new routable from Lambertus.
Todd, you could also install those maps on your computer and let Basecamp generate and send the maps to your device. Did you try that too?

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#13 2017-12-05 14:52:39

Todd R1949
Member
Registered: 2016-09-25
Posts: 7

Re: The latest GMAPSUPP.IMG for Ontario, Canada causes problems

OK, I just tried a GMAPSUPP created from Basecamp with the latest Windows install from OSM and my Nuvi 56LM still crashed when I tried routing.
So let me try to clear up definitions...
The quarterly map that I get right from Garmin to the internal map on the Nuvi of course works fine.
The Garmin OSM download that I refer to is the one from http://garmin.openstreetmap.nl/ and the downloaded GMAPSUPP that I copy to the microSD card in my GPS is the one that causes the gps to crash when I select that map and route with it. Also, now I know that the downloaded file that is used to update the Basecamp map and then produce a GMAPSUPP file on the microSD card by using the Basecamp Mapinstall also causes the gps to crash.
Besides the internal Garmin map, the only other one that still works is the GMAPSUPP that I created following the procedure as outlined in  http://www.cferrero.net/garmin_howto.html  which also uses data provided by an OSM extract and then produces a GMAPSUPP file using the detailed and time-consuming process of running splitter/mkgmap on my computer.
So, I hope this clears up all the details.
The bottom line is the files from Garmin OSM from http://garmin.openstreetmap.nl/ no longer work with my Nuvi 56LM.

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#14 2017-12-05 15:35:23

ligfietser
Moderator
Registered: 2008-10-09
Posts: 4,645
Website

Re: The latest GMAPSUPP.IMG for Ontario, Canada causes problems

Todd R1949 wrote:

The bottom line is the files from Garmin OSM from http://garmin.openstreetmap.nl/ no longer work with my Nuvi 56LM.

Since this version is from a certain extraction date and the one that you have compiled yourself with the same software (mkgmap) works without issues, I could imagine that a next update will work, if the cause was a bug in the OSM data?

So you can keep an eye on the coming updates, or keep generating those maps yourself, because then you have always the latest OSM data.

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