Embed Size (px)
Transcript of Aerial Photography
Aerial PhotographyAn Archaeological Aid
Aerial PhotographyFacts:Aerial photos reveal buried sites that can not be seen from the groundPlanes, balloons, UAVsTypes of marks seen:Shadow marks: produced by different angles of the sunSoil Marks: produced by different tones of sub-soil. Usually fragments of mortar, other building materialsCrop Marks: buried features affect growth above them and therefore color.
Ancient Pueblo SitePueblo site seen from ground levelAerial photo of same site now showing layout of ruins
Pueblo Crop MarksAlthough grass, trees and brush grow all over the site, none grows over the walls and room blocks themselves.
Negative Crop Marks from AustriaConcentric rings in photo are ditches.
Crop Marks from Musov, MoraviaCrops viewed from surfaceAerial view of same place
Negative Crop MarksGallo-Roman Villa Burgundy, FranceNot evident from groundLarge Roman villa, 100m per side. Outline of rooms can be seen. Walls are 60 cm below surface
Color Infared PhotographyCIR shows foot paths used by Maya (Costa Rica).
Color Infared PhotographyCIR shows 3 footpaths which connect a prehistoric cemetery beneath the forest canopy.
Aerial PhotographyWhy use it?Ground level photo of person walking among scattered stones
Aerial PhotographyWhy use it?Same area as previous slide but taken from the air!These stones are aligned in a large grid., possibly to outline food gardensThis example clearly shows what can be missed if aerial surveys are not used in archaeological prospecting