This paper presents and demonstrates a method to determine wave field modifications resulting from elliptic
bathymetric anomalies (pit or shoal) with gradual transitions in depth. The analytic (semi-numerical) method is valid for
linear waves in a uniform depth domain with an arbitrary number of concentric elliptic forms of different, but uniform,
depths combined to represent either a pit or a shoal. Sections present the theory, formulation, and results in the form of
contour plots of the relative amplitude in the presence of the depth anomaly. The elliptic forms in the model induce wave
transformation through processes of wave refraction, wave diffraction, and wave reflection with asymmetry in the solution
for oblique incident wave angles. The results investigate the effect of the incident wave angle on the resulting wave field.