Mm, looks like that EPSG code is missing from WebODM’s internal database.
Using the latest version (or Lightning) there’s an option to export via PROJ definition, but the Windows release hasn’t received updates in a year (Windows Native Installer Update Timeline - #3 by JazperInc), so you can’t do that from there yet.
Here’s the export dialog with the latest version of WebODM (3.1.3)
Workarounds:
- Reproject using QGIS
- Reproject from Lightning
- Use the docker version of WebODM (free and always on the latest version) Installation | WebODM