Microwave reflectometry has been proposed as an alternative/back-up approach to usual magnetic systems in long pulse operation on ITER for plasma position and shape control. This new application of reflectometry must be fully demonstrated in present machines in view of its importance for ITER. First experiments performed in ASDEX Upgrade with FM-CW reflectometry diagnostic show that radial variations of the plasma column due to radial as well as to vertical plasma displacements could be followed with sufficient accuracy (= 1 cm).In this paper we estimate the plasma position and shape, in 2 points in the inner and outer mid plane, of ohmic L-mode density limit and ELMy H-mode discharges in ASDEX Upgrade. It is shown that if normalized density layers are selected, at a certain percentage of the average line density, the results from reflectometry are in good agreement with the corresponding data derived from the magnetics. Further work aiming at the full demonstration of plasma position and shape measurements from reflectometry is discussed.