I am not exactly clear on what are the differences between differential geometry and differential geodesy. Are principles in differential geometry used in differential geodesy ?
It appears that differential geodesy would be one of the applications of differential geometry but I do not have a reference that says as much.
Could somebody clarify for a beginning student like myself ?
EDIT
From this link Differential geodesy
It appears that it is indeed the applications of differential geometric techniques to the curves and surfaces that occur in geodesy.