5.2 Copan archaeological area, Honduras
The two main courts (Great Plaza and East Court) of the Maya site in Copan, Honduras (Remondino et al., 2009) were surveyed using an UAV model helicopter (Eisenbeiss, 2009) equipped with a Nikon SRL digital camera (12 Mpx). The flying height was approximately 100 m above ground and the acquisitions produced ca 250 images (average GSD of 1 cm). The image triangulation was automatically achieved using ATiPE (Fig. 4) while the GCP measurement phase required the user interaction. Due to the dense vegetation coverage, the successive automated image matching procedure produced some blunders but the non-occluded man-made structures were correctly reconstructed (Fig. 5).