I have a 3D mesh derived from Lidar data and I need to accurately geolocate it as a flt file.

I can see fields within the flt header that seem to be the right kind of thing (fltProjection, fltOriginLat/Long, fltHdrEarthModel, fltUTMZone etc) but I can't find any API calls that set these fields.

The only geolocation functions I can see in the API refer to images and textures.

Can someone point me in the right direction?

Thank you. I have been looking for documentation on geolocation with OpenFlight but with no luck at all.

Like all node attributes, you use the OpenFlight API function mgSetAttList to "set" these values on the fltHeader node. For a complete list of node types and field definitions, see the OpenFlight Data Dictionary section of the OpenFlight API Reference Documentation.