1. A method for migrating three dimensional seismic data in tilted transversely isotropic (“TTI”) media, the seismic data representing signals acquired by deploying seismic sensors and a seismic energy source, actuating the source and detecting seismic energy in response thereto, the method comprising: transforming the seismic data into the wavenumber-frequency domain; generating numerical solutions to an exact relationship for a three dimensional dispersion relationship of seismic energy traveling through TTI media, the numerical solutions including selected input values of polar angle and azimuth angle of a transverse isotropic axis of symmetry and selected values of Thomsen anisotropic parameters, the exact relationship defining wavenumbers for seismic data in three dimensions; determining coefficients of a two dimensional Fourier finite difference relationship that result in a best fit of wavenumbers to the numerical solutions for each splitting direction; migrating the transformed seismic data using the wavenumbers from the Fourier finite difference relationship to generate an image; and at least one of storing and displaying the image.