Monitor calibration for curved-screen display?

I have a big curved (radius 1m) Samsung C49G9 display.

Has anyone dealt with using something like this in ordinary experiments, especially in conditions where you aren’t viewing the display at the radius of curvature?

It seems in placing stimuli (in units of dva), I could view the display at 1m and everything would be very accurate (one dva would be the same pixels everywhere on the screen, for once), but there’s a hitch:

monitor calibration is using the display width to estimate pixels per degree. How is it doing this, exactly? Should I input a fake value for a virtual flat screen (knowing, as I do, the true angular width of this 119cm curved display)? Or is it better to use the actual value? Or… I don’t want to reinvent the wheel here.