View Services (WMS) of minutes of the first editions of the 1:50.000 map of Spain, colloquially known as catastrón, which began to be made by photomechanical reproduction techniques, from 1910 to 1970. They were made at a scale of 1:25.000 but covering the extension of a sheet of the MTN50. They are kept in the IGN Cartoteca.
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