How to make 1490T recognize gmapsupp.img in internal memory

To place your map file (gmapsupp.img) into the internal memory on your gps. First, backup the file in memory called gmapprom.img Second, rename gmapsupp.img to gmapprom.img and copy it to your internal memory.

Should work.

Thanks, but I've done this on the Nuvi 350 and 255 before and I can keep the existing gmapprom.img and add a second map file gmapsupp.img (and 3rd gmapsup2.img) into internal memory and the unit loads them all, as discussed in may threads here. Its just that the 1490T is different and does not load the additional img files. Anyway, just for kicks, I did what you suggested, and backed up and deleted the existing gmapprom.img and replaced it with the re-named OSM file. The 1490T then thought there were NO map files (other than the basemap).

It would have been okay for me to put multiple OSM maps on the SD card. Unfortunately, all the Garmin units I know of only read the gmapsupp.img off the card, and nothing else, and I don't want to keep combining maps in MapSource because some OSM areas are pretty static, and one area I'm contributing to changes every day.

The nuvi 1xxx series has the advantage/ability to load any number of maps from it's internal memory. Simply create a folder in the root of the nuvi drive called "Map" (no quotes) and copy your desired map into that folder. The map does NOT have to be called gmapsupp.img nor any of the older nuvi naming conventions...in this case you should give it a more descriptive name such as Topomaps.img (or anything else for that matter). The only stipulation is that it ends with the .img extension.

Interesting! Do you have any other tidbits of information about file structure in the 1xxx series?

Bob

Thank you!!! I would never have guessed, and the Map folder trick works on the SD Card too. I've been Googl'ing this for the past day, and only here have I found the right information. Now I can load smaller OSM tile groups without having to worry about the former limit on the number of .img files.

Thanks for the tip. I was wondering the same thing myself.

Great tips! It's small modification, but very attractive.

How can this be done on my 765t? I have two seperate img files on 2 seperate sd cards. Would be nice if i could get them all on one. Map Folder doesn't work.

Put one on the device memory and the other on the SD card.

Alternately, if you have the source maps loaded in MapSource, load the maps from the different map products to a single mapset in a single gmapsupp.img file.

I don't think you can have more than 1 working map on your SD card. In fact you can have more than one map, but only the gmapsupp.img will be recognized. If you have a small map you can drop it to your internal memory and named it gmapsupp.img. My understanding is that you can have 3 working maps at the same time: your main map on your internal memory named gmapprom.img, one supplemental map on your internal memory named gmapsupp.img and one supplemental map on your SD card named as gmapsupp.img and that's it.

On a nuvi 2x0, 2x5, 3x0 and perhaps others, you are limited in how many maps you can have installed, based upon the file names of those maps.

gmapprom.img - Primary/Preinstalled Maps
gmaprom1.img - Secondary Mapset
gmapbmap.img - The base map
gmapoem.img - OEM Maps (cannot be deselected from device if used)
gmaptz.img - Time Zone Map
gmap3d.img - 3D Buildings Map
gmap3d1.img - 3D Buildings Map - Secondary Mapset
gmapsupp.img - Mapsets installed via Mapsource/Mapinstall

The SD or Micro SD card for a garmin device can only contain gmapsupp.img

Additional information: http://www.gpspassion.com/forumsen/topic.asp?TOPIC_ID=120770

I don't have a nuvi 1xx0 unit so those that have it can confirm this, but these map names are still in use. However, by adding the \Map directory to the internal memory and SD card, you can now load maps with any name.

There still is a limit as to how many maps you can have running at once though.

On your 765, you should have a GMAPSUPP.IMG already if you have the 2011.20 maps. That's Mexico.

So, you'll be relegated to a GMAPSUPP.IMG on your card only. It would go in the Garmin folder on the card.

And no, you can't rename it on the 765. Only the 1xxx's.

Just copy it the same as you would copy any file on your computer.

Put it in the /garmin directory.

Thanks Rob, i was afraid of that. Who's got a 3790T, maybe we can do it with that? Was eying one of those anyways.

1xxx's only, bud... Yea, it bites.

Guess there's always Motorcycle Mama's second option

Go for it! But, back up the current file first.

Just a thought...

I'm holding off, someone might come and tell me it can be done with the 3790T. Birdie told me you gonna buy one soon.

Me? I'm happy as a lark with my 775T. No 3xxx's in my future anytime soon. Unless someone gives me one, that is. Yea, right!

Are you sure that statement is correct Juggernaut? I have 2011.20 on my 755T and it has street level detail for Mexico. But I do not have a gmapsupp.img file. I think it would be the same on the 765T.

Pretty sure, but I may be wrong. I'll have to check.

I had three maps. One on the nuvi and 2 others one 2 seperate sd cards. I didn't want to carry those 2 cards around and thought there might be a way to combine them on my 765t. I ended up doing what
Motorcycle Mama suggested in a way. Backed up my gmapprom.img. Then deleted it. I took my gmapsupp.img which was my 2010.40 and renamed it gmapprom.img. Then used Mapsource with topo canada v2 installed and loaded My topo maps onto my nuvi which became gmapsupp.img. I still have Mexico. Takes forever to start up now though

I'm trying to upgrade my 1490T from the 2011 maps to the 2013 maps. I've backed up the gmapprom.img file (1,196,576 KB) which was located in the \System folder on my Garmin and then deleted it. I went to copy the new file which is 1,706,688KB but there isn't enough free space on my internal memory to load it. Are there other files that I could delete from the internal memory to free up space?

First off, welcome to The Factory.

When you say you're planning to copy the 1.7GB files to the 1490, where did that file come from? City Navigator North America NT maps are locked to the nuvi with the lifetime update that it was installed to. If you're trying to copy a gmapprom.img file for City Nav from another device to your 1490, stop now--it won't work--and it's wrong--and discussion of such topics is not welcome here.

If I'm misunderstanding you and you have a lifetime or onetime map update that you're applying to this 1490, note that during the update process, you'll be given the option to install the map to a SD card:

https://support.garmin.com/support/searchSupport/case.faces?...

I recommend a Sandisk 4 or 8GB card. Also, you may have a real problem if you first delete the old gmapprom.img file from your device when doing an update. When doing a proper update, the old map will be deleted and the space it took up is already considered by the update process. Note also that if you don't do a proper update, your nuvi won't receive its Junction View file.

[Edit] Checking this entire thread, I see it's discussing Open Source maps. If that's the map file you're trying to install to the 1490, the best option is to install this too-large map to a SD card as a Supplemental map and keep the 2011 City Navigator installed to the nuvi.