I have discovered that ChatGPT can work with a GPX 1.1 export from my MRA, make changes, and produce a file which imports quite well back into MRA. However, it loses a number of the proprietary attributes of an MRA map.

For example, I can have AI locate a via point in the GPX and rewrite the title and commentary for that via point; but on re-import I lose the colour and icon for that via point.

MRA has quite a rich internal waypoint model: type, icon, colour, name, pause, note and off-road status are all separate properties in the current Routeplanner. And GPX 1.1 includes an <extensions> element, inside which an application can store arbitrary XML in its own namespace. That means MyRoute-app could encode essentially all of its waypoint attributes while still producing a valid GPX 1.1 file.

My suggestion is that there should be a “GPX 1.1 – MyRoute-app lossless” export format which would simultaneously be:

• a standards-compliant GPX readable by Garmin, TomTom and other applications;
• a portable backup of an MRA route;
• completely round-trippable back into MRA;
• suitable for tools like the editing we can do with AI, without losing colours, settings, via-point classifications etc.

Ultimately there may be better solutions to integrate AI into MRA directly, or to build a special purpose GPT for map editing. But for the moment, I think the simplest and easiest approach would be a lossless export format.