CORONA Photographs in Monsoonal Semi-arid Environments: Addressing Archaeological Surveys and Historic Landscape Dynamics over North Gujarat, India

Abstract

Here we illustrate a ground map approach that uses orthorectified CORONA KH4B images and declassified topographical maps to study historical land-use dynamics and to help planning archaeological survey in the monsoonal semi-arid alluvial plains of North Gujarat, India. In spite of its generalized use in archaeological applications, CORONA photographs have rarely been used in Indian archaeological contexts. The methods discuss a cost-effective and integrated protocol for: (i) obtaining ground control points (GCPs) and orthorectify CORONA photographs when very high-resolution imagery or detailed topographic maps are not available; and (ii) evaluating the integration of declassified datasets into Google Earth Pro for addressing archaeological surveys in remote areas. The merging of CORONA imagery with declassified USA and the former USSR historical military maps provided a picture of the human–environment interaction in North Gujarat of the past 40 years, prior to the intense development of mechanical agriculture and regional irrigation channels. We conclude by identifying the human and climate-induced taphonomical processes that are obliterating a fragile landscape characterized by archaeological scatters located in fossilized sand dunes.