[OSM-newbies] Multiple gmapsupp.img files on Garmin

[Dan O'Hara]

Hi guys

Here is an extract from the Garmin Oregon Wiki
(http://garminoregon.wikispaces.com/Maps#toc20) on multiple img files.

"M17.) How do I use multiple map (.img) files to help me better manage maps
on my Garmin Oregon?

Even though Mapsource and MapInstall always save maps sets as
[drive]:\Garmin\gmapsupp.img this file can be renamed once it is on the
Oregon to any name (as of beta software 2.99) as long as the .img extension
is preserved. This is very helpful if you want to manage multiple maps sets,
say one for your home area that would change infrequently and one for a
travel destination(s) that you might change frequently. The steps for doing
this are:

   1. Follow the procedure in M15 to create and download your home map set
   2. Using a file explorer on your computer locate
[drive]:\Garmin\gmapsupp.img and rename the file to
[drive]:\Garmin\myhomemaps.img
   3. Follow the procedure in M15 to create and download your travel map set


When you are done with your travel map set this file can be deleted and
replaced with a new map set for your next destination without having to
rebuild and transfer your home map set."

Previously to 2.99 you would have had to rename the gmapsupp.img to one of
only 2 other files names (although you could save gmapsupp.img also to the
MSD card).  Renaming to anything else meant that the file could not be read
by the unit.  Now you can rename gmapsupp.img to any name to fit more maps
on (provided space and only 1 gmapsupp.img on the unit and only 1 on MSD
etc).


Dan



-----Original Message-----
From: newbies-bounces at openstreetmap.org
[mailto:newbies-bounces at openstreetmap.org] On Behalf Of swanilli
Sent: Saturday, 22 August 2009 2:36 PM
To: newbies at openstreetmap.org
Subject: Re: [OSM-newbies] Multiple gmapsupp.img files on Garmin

Hi Bill

It seems that it does have to be uploaded as gmapsupp.img first.

When I start my Oregon 300, a "Loading maps" (or some such) message
appears at the bottom of the screen. My guess is that it must be
locating the maps in memory rather than in their files, hence the name
change does not cause them to be lost.

I have tried copying the files (not named gmapsupp.img) but they seem
to be ignored – they are only recognised if named gmapsupp.img at
least once.


2009/8/22 Bill Ricker <bill.n1vux at gmail.com>:
> I will have to try this with my 76csx
>
> Does it have to be loaded as gmapsupp.img and used once before each
> renaming?
>
> I have been placing extra *.img in named subdirs and copying to Garmin/ to
> select, but being able to switch without a usb connect would be much
better,
> since states in New England are so small, I can drive across a corner of 
NH
> or VT in not much longer than than it took to swap
>
> Bill
>
>
>
> On Fri, Aug 21, 2009 at 10:24 PM, swanilli <swanilli at gmail.com> wrote:
>>
>> I have just accidentally discovered that it is possible to have
>> multiple gmapsupp.img files on my Garmin Oregon 300. Since I have not
>> seen this method mentioned anywhere else here it is.
>>
>> Problem: I regularly update my local OSM data (since I am in Australia
>> from http://www.osmaustralia.org/garmin.php) but I also have other
>> maps, notably topographic, on the Garmin uit that I don't change. If I
>> upload the combined gmapsupp.img using MapSource it takes forever.
>> What would be nice would be to only upload the tiles that have changed
>> but the conventional advice is that there can only be one gmapsupp.img
>> file per drive i.e. one in the base unit and one on the micro SD card.
>>
>> Method:
>>
>> 1. Upload to Garmin unit the unchanging maps. This creates (or
>> overwrites) a file called gmapsupp.img.
>>
>> 2. Disconnect the Garmin unit, switch on, then open and check the map
>> uploaded.
>>
>> 3. Reconnect the Garmin unit to your computer and locate the
>> gmapsupp.img just created.
>>
>> 4. Change the file name to anything else e.g. gmapsupp-topo.img.
>>
>> 5. Disconnect the unit and switch on again. The original maps will
>> still be there.
>>
>> 6. Reconnect and upload a new set of maps. This will create a new
>> gmapsupp.img file but not overwrite the first lot of maps.
>>
>> 7. Repeat the steps above, changing the file name each time.
>>
>> 8. To overwrite data, change the name of the file back to gmapsupp.img
>> and upload new maps. (No sure if the file can't just be deleted but I
>> have been getting the "The map set is approximately nnMB, but only
>> nnnMB is available in the destination. Please select fewer maps and
>> try again." message from MapSource.)
>>
>>
>> There seems to be no limit to the number of files that can be handled
>> in this way. I have 16 at present making it very quick to add or
>> update existing data.
>>
>> _______________________________________________
>> newbies mailing list
>> newbies at openstreetmap.org
>> http://lists.openstreetmap.org/listinfo/newbies
>
>
>
> --
> Bill
> n1vux at arrl.net bill.n1vux at gmail.com
>
> _______________________________________________
> newbies mailing list
> newbies at openstreetmap.org
> http://lists.openstreetmap.org/listinfo/newbies
>
>

_______________________________________________
newbies mailing list
newbies at openstreetmap.org
http://lists.openstreetmap.org/listinfo/newbies