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lillyelse Regular Visitor
Joined: Aug 03, 2007 Posts: 87 Location: Derby
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Posted: Mon Sep 12, 2016 12:10 am Post subject: Europe DEM file on a Garmin Nuvii 3598LMTD |
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Anyone know what the Europe DEM file does?
The latest map update to 2017-20 appears to have deleted it because it no longer announces itself in "My Maps", where there was 3 entries; CN Europe NTU 2017.10, CN Europe NTU 2017.10 3D, and Europe DEM before the update from 2017.10 to 2017.20.
All four files exist on the microSD card but only "Europe DEM" is missing from "My Maps" display.
Now, after the update, only two entries are visible, NTU Europe 2017.20 and NTU 2017.20 3D.
Otherwise everytning works as normal, even 3D buildings.
Thanks in advance |
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Kremmen Pocket GPS Verifier
Joined: Mar 03, 2006 Posts: 7123 Location: Reading
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Posted: Mon Sep 12, 2016 6:30 am Post subject: |
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My 2599 is showing:
CN Europe NTU
2017.20 Foursquare
CN Europe NTU
2017.20 ALL _________________ DashCam:
Viofo A119 V3 |
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sussamb Pocket GPS Verifier
Joined: Mar 18, 2011 Posts: 4462 Location: West Sussex
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Posted: Mon Sep 12, 2016 6:39 am Post subject: |
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The DEM file is the digital elevation model that shows the terrain, it's only used by certain models, the 3598 is one.
MapUpdater is known to occasionally delete this file. You can either restore it from a backup (if you have one) or run Express which normally copes with the DEM map.
Note also the file may be there but named incorrectly. It needs to be named gmapdem.img so if it's named something else rename it. _________________ Where there's a will ... there's a way. |
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M8TJT The Other Tired Old Man
Joined: Apr 04, 2006 Posts: 10118 Location: Bexhill, South Sussex, UK
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Posted: Mon Sep 12, 2016 8:38 am Post subject: |
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Where is the DEM file supposed to be located suss |
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sussamb Pocket GPS Verifier
Joined: Mar 18, 2011 Posts: 4462 Location: West Sussex
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Posted: Mon Sep 12, 2016 9:06 am Post subject: |
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Would normally be in the .system folder along with the map files. On the SD card it would be the Garmin folder. _________________ Where there's a will ... there's a way. |
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lillyelse Regular Visitor
Joined: Aug 03, 2007 Posts: 87 Location: Derby
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Posted: Mon Sep 12, 2016 1:14 pm Post subject: Europe DEM file Nuvii 3598LMTD |
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Many, many thanks for all the very helpful advice and coments, particularly to sussamb.
One final question if I may. What is the file name of the DEM file if it isn't already named "gmapdem.img"? I know there is a "gmap.img" file which is the main map.
Is this DEM file updated with each map update or is it similsr to a "base map" that is not updated regularly please? |
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sussamb Pocket GPS Verifier
Joined: Mar 18, 2011 Posts: 4462 Location: West Sussex
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Posted: Mon Sep 12, 2016 2:11 pm Post subject: |
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The DEM file doesn't change much, if at all. You should be able to identify it as it will be smaller than the EU file or larger than the UK one, depending which one you have. In the past when this has occurred it's been named sonthing like DxxxxxB.img where the xxxxx is some number. _________________ Where there's a will ... there's a way. |
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lillyelse Regular Visitor
Joined: Aug 03, 2007 Posts: 87 Location: Derby
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Posted: Mon Sep 12, 2016 6:34 pm Post subject: Europe DEM file Garmin 3598LMTD |
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Thank you again ssumb. I've found a device backup that has the file os I'm OK now.
Looks like this particular unit has been exposed to Apple's file system at some stage in the past as I've found a lot of strange apple file attributes that dont make sense so I've removed them. However I'm concerned that there may be a lot of hidden files using up precious megabytes that I don't know how to get rid of as yet. Any suggestions?
Cheers. |
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CDK Regular Visitor
Joined: Apr 20, 2006 Posts: 122 Location: Ashford. Kent. UK.
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Posted: Mon Sep 12, 2016 6:52 pm Post subject: Re: Europe DEM file on a Garmin Nuvii 3598LMTD |
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lillyelse wrote: | Anyone know what the Europe DEM file does?
Now, after the update, only two entries are visible, NTU Europe 2017.20 and NTU 2017.20 3D.
Otherwise everytning works as normal, even 3D buildings.
Thanks in advance |
I have the same situation as above.
The DEM file is missing after the update. Also missing from the SD card.
Checked my 3598 and followed sussumb's advice.
Also reinstalled the maps by GE, but no change.
Any thoughts?
Regards |
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Kremmen Pocket GPS Verifier
Joined: Mar 03, 2006 Posts: 7123 Location: Reading
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Posted: Mon Sep 12, 2016 7:14 pm Post subject: |
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My 2597 and 2599 don't have the 3D file (obviously as 3D isn't supported)
Is this 3D file old or new for this update. Have Garmin replaced the DEM file with this 3D file hence the DEM removal ? _________________ DashCam:
Viofo A119 V3 |
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sussamb Pocket GPS Verifier
Joined: Mar 18, 2011 Posts: 4462 Location: West Sussex
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Posted: Mon Sep 12, 2016 7:27 pm Post subject: Re: Europe DEM file Garmin 3598LMTD |
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lillyelse wrote: | Thank you again ssumb. I've found a device backup that has the file os I'm OK now.
Looks like this particular unit has been exposed to Apple's file system at some stage in the past as I've found a lot of strange apple file attributes that dont make sense so I've removed them. However I'm concerned that there may be a lot of hidden files using up precious megabytes that I don't know how to get rid of as yet. Any suggestions?
Cheers. |
If you're using a Mac check the trash, that should be emptied. _________________ Where there's a will ... there's a way. |
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sussamb Pocket GPS Verifier
Joined: Mar 18, 2011 Posts: 4462 Location: West Sussex
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Posted: Mon Sep 12, 2016 7:29 pm Post subject: |
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Kremmen wrote: | My 2597 and 2599 don't have the 3D file (obviously as 3D isn't supported)
Is this 3D file old or new for this update. Have Garmin replaced the DEM file with this 3D file hence the DEM removal ? |
No, the 3D file is the one that produces the 3D buildings, the DEM file produces the terrain. _________________ Where there's a will ... there's a way. |
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sussamb Pocket GPS Verifier
Joined: Mar 18, 2011 Posts: 4462 Location: West Sussex
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Posted: Mon Sep 12, 2016 7:31 pm Post subject: Re: Europe DEM file on a Garmin Nuvii 3598LMTD |
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CDK wrote: | lillyelse wrote: | Anyone know what the Europe DEM file does?
Now, after the update, only two entries are visible, NTU Europe 2017.20 and NTU 2017.20 3D.
Otherwise everytning works as normal, even 3D buildings.
Thanks in advance |
I have the same situation as above.
The DEM file is missing after the update. Also missing from the SD card.
Checked my 3598 and followed sussumb's advice.
Also reinstalled the maps by GE, but no change.
Any thoughts?
Regards |
Did you ever make a backup? You should be able to copy the DEM file from a back up. _________________ Where there's a will ... there's a way. |
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MichaelCahill Regular Visitor
Joined: May 23, 2008 Posts: 132
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Posted: Tue Sep 13, 2016 12:59 am Post subject: |
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THe DEM file seems to have disappeared from my 3590 following the recent update and I don't seem to have backed it up previously.
I have a folder named D166000 on my Garmin but it seems to be contain .glx files. Assuming that this is not the file mentioned, where can I get a copy of the DEM file to put back on my device? I ran GE but it didn't give an option of downloading such a file. |
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lillyelse Regular Visitor
Joined: Aug 03, 2007 Posts: 87 Location: Derby
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Posted: Tue Sep 13, 2016 1:07 am Post subject: Europe Dem file for Nuvii 3598 LMTD |
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Once again, thank you to all helpful members. I have now restored the Europe DEM file on my devices from a backup I did in 2015. The file is "gmapdem.img" and is 310,392Kb in size, dated 15 June 2015, so would travel well within an email.
I'll wrap it up in a folder and email to interested 3598 owners if they get in touch. There is an accompanying "gmapdem.sum file", but I dont think it will be needed.
Must stress that although I've got the DEM file installed in the .system folder I haven't yet tried it out with this Full Europe 2017.20 map update. Will do that this comming weekend.
Looks as though Garmin have tweaked the 3D bit of the mapping, maybe to eliminate the Europe DEM file but time will tell.
Cheers. |
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