Map / GPS wall poster

Try a trophy shop - they probably could handle that sought of job ?

About 30 odd years ago an 'arty' friend of mine was doing a similar type of thing - I think he used a photo negative and exposed the metal plate which was coated with a photo sensitive emulsion which etched the surface.

So it is not a new thing!
Good luckSubaru Forester
"size isn't everything"

Bear
You may get some help from maybe a sheet metal place that does Laser cutting. They tend to be able to etch and cut to great accuracy but there would be a lot of if's. The etching may not be visible enough and your file would have to suit their system. But you could get your map done in nearly any metal. A polished stainless steel could be nice. If you're in Brisbane, try Samin sheet metal.
Allan

I made a simple one out of a Shell 'Australia- Roadmap'. Opened the map up and taped it on to a piece of hardboard and then used a felt ink pen to fill in all the roads we have been on. It is getting a bit worn now and might have to make a new one. All these projects keeps one busy!

Cheers,
Willem
Out on the Gibber