So, I've been experimenting with this a few times but never showcased anything I had. Specifically importing a bitmap image into FA2 and making a map out if it. And after my first (failed) attempt at it, I figured I'd give it another go, this time with a lot more experience.
I started by grabbing an image from the Polygonal Map Generator (https://www.redblobgames.com/maps/mapgen2/). I would have that image right now but... I needed the hard drive space.

After that, it didn't take all that much to get this map into working shape.
- Used AutoShore to assist in fixing the beaches
- Added Ore, Tech Buildings and Cliffs. Also added a lake in the center.
- Tested the balance of the map and adjusted accordingly.
In the end, this is what I have. I hope you enjoy it. Doesn't work as great for naval battles unfortunately but head-to-head tournament style games are pretty good.