The Official Plan of 1939 consists of a series of maps composed by a general plan at 1:5000 scale14 and 50 sheets of details at 1:1000 scale15 corresponding to the 51 sectors in which the municipality of Santiago was divided.
El Plano Oficial de 1939 consiste en una serie cartográfica compuesta por un plano general a escala 1:500014 y 59 láminas de detalles a escala 1:100015 correspondientes a los 51 sectores en que estaba dividida la comuna de Santiago.