But tell us more about Android on the Overlander, does it have a regular web browser, such as Chrome?
I use iOS myself, but have a few Android devices for experimenting/testing. I install Termux which gives me a Linux subsystem on Android where I run a local webserver. I can then access maps stored on the SD card using a web app in Chrome with no internet connection.
Last post by dessmo - November 27, 2023, 08:26:02 AM
Seems like Oruxmaps works pretty well on the Garmin Overlander. I have so fare only tried it with my Garmin freeman's from www.frikart.no, but they seem to work well.
When using iPhone/iPad I have been quite happy with GaiaGPS, but the app did not work very well on the Garmin Overlander. I will play around with the Oruxmaps app and post some feedback on how I think it works. One thing that I already have noticed is that you can not export a waypoint directly to explorer from the Oruxmaps app, it give you the option in the app but when you try it just says Explorer can not import. That would have been a nice feature and would make it easy to switch between the different apps. I think a way around is just to store it and then import it manually into the explorer app.
Last post by Boyd - November 26, 2023, 08:14:52 AM
My own map-making concentrates on the Northeastern United States, so I'm not sure what might work well for you, sorry. However oruxmaps might be an option, since it does not use Google Play and offers various downloadable maps.
You can install maps on iOS devices and use them without an internet connection. I used to make maps for iOS and Android devices but stopped a few years ago because the process was too complicated for most people and used Mobile Atlas Creator - a free open source program that was just too quirky and buggy for me. But you might take a look, it runs on Windows and Macs and allows you to download maps from a number of sources and format them for many different apps on both iOS and Android.
Anyway, if you would like to revisit using your iPad/iPhone, here are apps that I verified as working with Mobile Atlas Creator, the apps themselves probably offer maps that you can download and and use without the internet as well
Guru Maps Map Plus TwoNav VectorialMap OkMap DiY MAP GPS
Mobile Atlas Creator should also be able to make maps for those other Android apps you have installed but are unable to purchase maps for.
There's also the HERE and TomTom apps for iOS devices. They have the option to download maps and use with no internet, but they're just for on-road navigation.
FWIW, the Guru Maps app for the iPhone also supports Apple CarPlay. Have been using it recently with my own maps installed on my phone - no internet connection needed and it lets me use my maps on the car's built-in screen.
Last post by dessmo - November 26, 2023, 05:05:42 AM
Thanks again Boyd for your patience and expertise:) I bought the Overlander GPS used so it did not cost me that much. I am planning to use it for what is was meant, overlanding. Until now I have used my iPhone and iPad with different apps which works fine, but I was looking for a unit that don't need an internet connection and have all maps you need preloaded. When it comes to the maps that come with the Garmin Overlander GPS I personally think the Garmin Explorer maps are not detailed enough for overlanding here in Europe/Norway. For on-road driving it is fine, but there are maps available with much more details that are useful for off-road driving and camping than what Garmin gives you. To my understanding you can not use a standard Garmin map in .img-format with the Explorer-app. I have already sideloaded some android apps that have very good maps and that works very well on the Overlander except for downloading maps. That requires a small fee, and the only way to verify that service it has to use the Google Play app which is not included on the overlander. I have tried side loading the play app, but it will not work.I think this might also be a problem with other apps, the free version does not allow you do download maps, and only way to verify that you have paid is via the Play-app. I will try to side load Oryxmaps and see if it works.
Last post by Boyd - November 25, 2023, 10:25:23 AM
Well, there are a lot of Android GPS apps, not sure if they would work on something as locked-down as a Garmin device however. And none of them really work with Garmin-format maps. Orux Maps attempts to open Garmin .img files, but the support was very poor when I tried it (long ago). It used some kind of open source library for displaying the files that basically converted them to raster-format maps on the fly. But you could check it out, there's an APK version
Othewise, unfortunately, it sounds like you may have chosen the wrong GPS if you aren't happy with the maps that Garmin officially provides for it. I mean, if you want to use Android, you can get a pretty nice tablet for under $300 instead of Garmin's outrageous price! I got a 10" rugged Android tablet on Amazon from a Chinese company for around $200 to test a GPS app I'm working on myself, for example.
But just to confirm, have you tried copying the working .img files from your Astro to your computer, then copying them to the \Map folder on the Overlander? The "can't unlock maps" error message is bogus if you're using a free map of some kind, since they are not locked in the first place.
Last post by dessmo - November 25, 2023, 06:13:27 AM
Still struggling, got the device is saying it is not able to unlock the map. I have tried a couple of versions, to include what I use on my hunting GPS Garmin Astro 320. Is there an app that I could install (side load) on the Overlander that would make it easier?
Last post by Boyd - November 22, 2023, 04:06:56 AM
The Map folder needs to be in the root directory. IIRC, Garmin started doing this with the Nuvi 3xxx series sometime around 2009 and continued with the Drive series.I have several of these devices myself, the newest is a DriveTrack which I got around 5 years ago. It works fine with maps I've made myself.
This FAQ suggests that it can be done...
".IMG files must be located in a "Map" folder on the microSD card and/or the device for your device to display them."