Orthophotograph of the Autonomous Community of the Basque Country. Years 1977/78

Orthoimage of the Autonomous Community of the Basque Country in the years 1977-1978, generated from the photogrammetric flight in black and white of national scope carried out on behalf of the Ministries of Agriculture, Defense, Finance and the Geographical and Cadastral Institute (current National Geographic Institute). Black and white frames at 1:18,000 scale. Pixel size (GSD) between 45 cm and 27 cm, depending on zones.