What Maps Do You Have On Your Garmin In Addition To City Navigator?

For use on the dashboard of my car, and cars I rent at travel destinations, I've used a 3597 with just the standard Garmin map for more than half a decade. Only in the last year did I stop using it when I'm at home, as I prefer the onboard function of my new Tesla. But I still depend on the 3597 for destination car rentals.

For out-of-country travel I've relied for well over a decade on an eTrex Vista HCx. While I've bought a couple of Garmin-supplied cards for that (I think one topo and one North America streets), the main dependence has been on maps from OSM or BBBike for foreign travel.

While the onscreen appearance of maps from those sources on the tiny eTrex screen leaves a lot to be desired, having the "map that knows where you are" along when walking in a foreign city is vastly comforting to me, and sometimes downright useful.

We too a couple of trips to Europe & Ireland so I bought the European Maps from Garmin and loded them up.

They actually worked pretty well.

In Ireland, many of the roads have no street signs, but I was able to estimate the locations and input the coordinates of the B&B's, restaurants etc. It worked surprisingly well.

I downloaded two new maps yesterday. One from BBBike.org and the other from https://www.openmapchest.org Just a couple of tips for anybody that hasn't done this and is interested in doing this:
BBBike.org offers a number of maps for Garmin in both Latin-1 and UTF-8. My Garmin Zumo XT works with Latin-1. (When dealing with Garmin data, the preferred format for text is generally UTF-8 as it supports a wider range of characters compared to Latin-1, though some older Garmin devices might only be compatible with Latin-1 depending on their capabilities; always check your device specifications if unsure. I have emailed Garmin support to ask them about this. I get the sense that Latin-1 will work on both older and newer devices. What I don't know is what is considered an "older device"?)

On my Garmin there is a folder named Garmin on both the Internal Storage and the Memory Card. The maps can go in either folder, but the naming can be critical. On my Garmin the name must be GMAPSUPP.IMG. If there is more than one, they may have a number in the name, this GMAPSUPP2.IMG, etc.

Both of these were issues that I dealt with the first time I added maps. I had almost forgotten about these issues until I started on this tonight. Knowing these two things made adding maps much easier and quicker. This was also my first time adding custom maps using Windows 11.

I am still reluctant to switch to Windows 11, I have a lot of old programs I am afraid will no longer work. How do you like it so far?

So far, so good.

For my automotive devices, I use just City Navigator. All I need for on road nav purposes.

For my handhelds, in addition to City Navigator, I use:

Various open source topo maps from GPS File Depot for states where I off road.

US Topo National Parks 24K East
US Topo National Parks 24K West
Garmin Topo Alaska Enhanced
Garmin 24K Topo Northeast
Garmin 24K Topo Southeast
Garmin Bluechart G3 charts for US & Canadian waters
Various homemade raster vector maps

I load these maps, or portions of them, individually depending on where I'm off roading. This saves storage space and, in some cases, speeds up the boot process and screen response time.

If they work on Windows 10 they should work with Windows 11, almost certainly, there is not much difference in the kernel application wise. One option is upgrading and if they don't work then immediately revert back.