Configurations of the domain structure of gadolinium-cobalt amorphous films placed in spatially nonuniform magnetic fields, which are produced by cracks in steel plates, are determined. The possibility of visualization and topography of the stray fields (their normal H z component) of cracks with openings 1.5 to 50 µm wide by the use of an applied magnetic field is shown. Strip domains, which determine the coordinates of edges of cracks with an opening width d > 20 µm (or peaks in the coordinate dependences), are formed near the saturation state under the action of the field. This result is in agreement with calculated theoretical topograms. An unusual discrepancy in the positions of peaks in experimental and theoretical topograms is observed for narrow cracks (d < 10 µm). It is likely that the observed discrepancy in the position of peaks in topograms of narrow cracks is related to the interaction of crack edges during their convergence, i.e., their partial mutual magnetization reversal.