We have undertaken a uniform analysis of a large sample of galaxy clusters to allow statistical studies of the clusters properties (Flin et al. 1988). This is the third of a series of papers (Trèvese et al. 1992 (T92); Flin et al. 1995) giving the positions, magnitudes, ellipticities and orientations of cluster galaxies having magnitudes between m3 and m3+3, where m3 is the magnitude of the third brightest galaxy within one Abell radius of the cluster center, together with finding charts and cluster surface density maps for 2818 galaxies in 15 Abell clusters. Details of the observations and data reduction are described in T92. Thus in Sect. 2 only the main features of the data and the reduction procedures are briefly described. Since in the first paper of this series only relative galaxies positions were given, we include in the present paper their absolute coordinates.