Abstract: A 3-D radial seismic survey method is described suitable for accurately defining by migration processing an area having a dome-like subsurface structure. Radial survey lines are plotted with polar symmetry with respect to a center position at the center of the dome, such lines traversing the steep dip in all directions at approximate right angles. Hence, the developed data is efficiently acquired data useful for defining the structure. Bisecting survey lines may be provided as the original lines diverge to satisfy sampling requirements for migration. Data is acquired and sorted into bins that are annulus sectors and which are maintained sufficiently uniform in size to be within a maximum-to-minimum ratio of 2-to-1. Seismic source and receiver lines may be coincident or angularly offset.