Resumen
This paper examines the methodology for the identification of stellar images in Carte du Ciel and Astrographic Catalog plates. Four CdC plates and one AC plate of the Córdoba plates collection digitized through MAMA were employed for the study. Centering errors between 0''.08 and 0''.17 were found. These errors depend on the distance to the plate centre. This accuracy is suitable for the utilization of these plates in astrometric programs. Morphological parameters of images were also evaluated.
