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General Discussion / Re: Map for navigation on Forest Service Roads
« Last post by robertt on August 01, 2021, 05:51:14 AM »
Thanks Boyd, it looks they they do have this info. I don't know a thing about shapefiles but I'll start reading up on them....
General Discussion / Re: Possible to convert Garmin .img maps for use on Android?
« Last post by Boyd on August 01, 2021, 03:41:09 AM »
You would probably need the source data that the mapmaker used, and it would be complicated. But have a look at Oruxmaps, it runs on Android and is free. It can use Garmin .img files, with some limitations. I was not impressed with the way it rendered the maps, but it worked when I tried it a few years ago.

Someone shared a map of an entire country with me via Google Drive. He rides a motorbike with a Garmin 64s and has extensively mapped a lot of the roads in this country on his Garmin device over the span of a decade. Unfortunately he's a bit clueless on computer matters so he isn't able to explain to me how the files work.

I don't and have never owned a Garmin device. All I've got is Basecamp on Windows.


I've got these files on my hard drive:

Laos_Map.img - 22MB

gmapsupp.img - 22MB (oddly, *exactly* the same filesize as the above)

Southeast_Asia.img - 490MB

These don't open in Basecamp and apps like MAPC2MAPC can't open them.


I'd like to take these maps and, at least,

1) get them to open on a desktop app like Basecamp, and ideally

2) convert and load them into an Android mapping app like OsmAnd (conversion into an .sqlitedb file or some other non-proprietary standard)

I'm completely unfamiliar with Garmin .img files, what the various files are, and how to use them. Are the maps this person has spent a decade making basically locked to Garmin devices?
General Discussion / Re: Map for navigation on Forest Service Roads
« Last post by Boyd on July 31, 2021, 07:12:22 AM »
Have you looked here? You can convert shapefiles to .gpx files - if you know how  ;)

General Discussion / Re: Map for navigation on Forest Service Roads
« Last post by robertt on July 31, 2021, 07:00:24 AM »
Thanks Boyd, I agree that if the info was available as tracks it would solve it. Probably too many roads in idaho to have discreet tracks for though. What I did for single track is create a transparent overlay that has all the single track in Idaho, works great and visible at all levels. I wat able to do this because Idaho has a way to download this single track info as a .kml file and I was able to work with that and make the the overlay. Problem is I don't know of a source for the same info on roads....
General Discussion / Re: Map for navigation on Forest Service Roads
« Last post by Boyd on July 31, 2021, 06:44:08 AM »
Sounds like you would be better served with TRACKS instead of a map. These would be roads converted to .gpx files. Tracks should be visible at all zoom levels (if not, I believe there's a zoom level setting to control this).

Not sure where this kind of data is available since I've never looked for it. But pretty sure you can find it somewhere.
General Discussion / Map for navigation on Forest Service Roads
« Last post by robertt on July 31, 2021, 06:40:49 AM »
I looking for a solution to help me navigate on my Oregon 610. Lets say get to an area that is 50 miles away utilizing a myriad of forest service roads. I can't find a solution where I can be zoomed out to 5 miles or so and still be able to see anything. The topo maps(Idaho Topo from this site) seem to have the good forest service road coverage but not visible zoomed out plus the topo lines completely cover the map. So in a nutshell, would be great if the forest service roads were visible at 5 miles and the topo lines were shut off completely. I've played with the zoom and other map setting and can't seem to come up with anything. It seems in general the zoom setting effect the topo lines and the roads in the same way. So reducing topo detail also reduces road detail. I've also tried some street maps and haven't found a solution. Hopefully I'm just missing something, thanks in advance.
GPSr Units / Re: Garmin GPSMap 76CSx
« Last post by Boyd on July 25, 2021, 11:13:16 AM »
Are you sure about that? Or is it perhaps a quirk of these older Garmin devices? Because I'm pretty sure that the maximum FAT32 file size is 4gb and not 2gb. This became an issue when Garmin's City Navigator EU file grew beyond 4gb, so Garmin now provides that map in two separate files.
GPSr Units / Re: Garmin GPSMap 76CSx
« Last post by Red90 on July 25, 2021, 04:21:15 AM »
Also individual map files canít be larger than 2 GB due to the way FAT32 is designed.
Using The Maps/Garmin Software / Re: How to install a GPSFileDepot file?
« Last post by coffent on July 12, 2021, 06:15:09 PM »
Thanks for the explanation!
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