The database of planetary images (BDIP: Base de Données d'Images Planétaires) comes from the digitization of photographs collected and preserved by the Center for Photographic Documentation of the planets held by the IAU at the Meudon Observatory in 1961 under the curation of J.H. Focas (IAUC, 12th General Assembly Report, 1964). A similar center was established at the Lowell Observatory in Arizona, under the responsibility of W.A. Baum. The photographs were duplicated between the two centers. Digitization was performed in 1998-2000, funded by the Science Council of the Observatory of Paris.
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