ISO-XML does indeed appear extremely niche, I can only see a couple of questionable tools floating about to convert shapes or other ag specific formats to/from ISO-XML.
And a potential gotcha is that apparently 0 degrees in ISO-XML could be Magnetic North which is going to make your conversions vs geographic locations vs epochs for archival data very interesting.
Even Global Mapper which supports over 300 formats doesn’t include ISO-XML
However, both the Fendt & John Deere applications appear to also accept shape file imports so you may be better off heading your workflow in that direction.
Both shape file export and closed lines (polygon) are on the EMLID to-do list, add your votes.
I can agree with @Wombo about trying other file formats. Emlid Flow supports exporting in several formats, such as SHP or KML. Please note that KML is only available in Emlid Flow 360. Or would you like to use ISO-XML for some particular reason?
Yes, Emlid Flow supports working with points and lines. But I’ve noted your request and passed it on to our team.
I second that for mapping purposing, EMLID should road map supporting closed polygons + being able to name these polygons. This request comes from the spray drone community for mapping purposes @wagner