findlevels function for 2d wave

Does findlevels function treat input wave always as 1d wave regardless the original dimension?
I tried findlevels on a 2d wave and it shows the result in a 1d wave, and I can't reference columns in the command as wavename[][0].
it is, indeed, a 1D-only operation.

--Jim Prouty
Software Engineer, WaveMetrics, Inc.
Here is another approach for 2D waves. Create a single contour on a 2D image at your desired level. Add to your Procedure:
#include <Extract Contours As Waves>
This will enable convenient extraction of a pair of 'x' and 'y' waves from the contour, whose (x,y) positions correspond to your level.