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Author Topic: Maps on micro SD card not being read by Oregon 600  (Read 4298 times)


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Maps on micro SD card not being read by Oregon 600
« on: September 12, 2016, 12:34:18 PM »
I'm using Windows 7 with Basecamp. I downloaded the US Topo 100K series onto Basecamp and they are beautiful maps, loads of detail. My Garmin Oregon 600 does not have enough internal memory to hold the US 100K series on it. I have successfully loaded the state 24K topo series for AZ, CO, UT, and NM onto the internal memory of the Oregon 600.

I have an 8 GB micro SD card with the folder GARMIN on it, installed the US Mtn TOPO 100K series on the card via the e:drive. I installed it onto the card via Basecamp mapinstaller. It was named "gpssupp" with no extension. No problem, I named it "usmtn topo" again with no extension. And the file is in the folder Garmin.

Load the card into the GPS and the map does not show on the setup maps section. Connect the GPS to the computer and the internal memory shows the previous topo maps I loaded. The SD card shows up and there is the new topo "usmtn topo".

How do I get the Oregon 600 to read the maps on the micro SD card? I have even tried loading the maps via basecamp and map installer to the f: drive while the GPS is connected to the computer. The maps end up on the card but again the GPS does not show them under map setup.


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Re: Maps on micro SD card not being read by Oregon 600
« Reply #1 on: September 12, 2016, 04:59:38 PM »
Map files must have an .img extension. If that wasn't showing on your computer, check your settings in the control panel, you need to show ALL extensions.

Beyond that, it may not be possible to do what you want. Completely aside from file size, your Oregon is limited to accessing a total of about 4,000 map tiles (or "segments") - see this: https://support.garmin.com/support/searchSupport/case.faces?caseId=%7B0b02f820-03db-11e0-e050-000000000000%7D

Maps are broken down into smaller tiles, and the 4,000 limit is calculated by the total of ALL maps installed on your GPS, including internal memory and the memory card. It doesn't matter whether or not they are enabled either. If you exceed the limit, some maps won't work properly or won't show up at all. Impossible to be more specific, it depends on your exact mix of map files.

So if you try installing a bunch of maps, you are very likely to exceed the tile limit. With the 100k US Topo maps (the ones originally supplied on DVD), that is very easy to do. I think they were over 6000 total segments so it's impossible to install them all on a GPS.

With Garmin's 24k map series, from what I've seen, you will hit the tile limit after installing a little over one of the maps. Like I said, this is completely unrelated to file size. It is not unusual to hit the tile limit with only 3 or 4gb of maps.

So, for starters, make sure your computer is set to show all file extensions, then make sure that all your maps have the .img extension. If you still have problems, it's likely due to the tile limits, although there are other things that could be wrong also.
« Last Edit: September 12, 2016, 05:02:30 PM by Boyd »