The Belvedere Castle of Fiumedinisi (ME) belongs to that historical heritage of Sicily characterized by abandoned and forgotten military architecture. Along the Ionian coast the defensive problem has been particularly felt over time, due to the proximity of the Turkish coast, the Middle East and the African one. The first defensive line was the coastal one, defined by principals placed on the sea in a strategic position for direct control of the coast.
The focus of the work is on close-range photogrammetry and mainly on the low-cost technologies, experimented in the survey of Tower of Marina di Vietri, a historical building erected in the sixteenth century at Vietri sul Mare in the Province of Salerno. The general objective is to codify a methodology for objectifying the comparisons of the results; hence, the research starts from an original analysis conducted on the returned orthophotos by several photogrammetric paradigms.