In this work, a possible approach, based on satellite remote sensing images and Geomatics techniques, useful to support the archaeological missions is presented. Archaeologists often suffers from lack of updated great scale maps needed to georeference and manage observations coming from the field. Furthermore they long for updated aerial or satellite images useful for extraction of indications about possible hidden elements, or for deduction about the general contest in which their digging is placed.For this work QuickBird and TERRA Aster data were acquired to produce an orthoimage of a specific area near Karima in Nubian Sudan. Aster stereo acquisition capability was used to generate an approximate Digital Surface Model that was used to carried out the orthoprojection of the QuickBird image. A GPS survey was performed to collect the Ground Control Points and the Check Points respectively needed for image exterior orientation and for metric quality evaluation of the final product.The resulting orthoimage was useful to drive to a common reference system all the existing field surveys and to check about eventual limits and evident relative position anomalies. In addition the spectral properties of the multispectral bands of the Quickbird orthoimage were exploited to guess information about the presence of evidences of possible hidden archaeological features .Some geophysical investigations were performed in December 2006 through a geo-radar and magnetic inspection approaches. Some refining operations are planned for the very next future: - a GPS PPP (Precision Point Positioning) survey aimed at defining a better absolute reference system; - a refined orthoprojection of the Quickbird image based on the Ground Control Points surveyed by GPS PPP; - a deeper image processing aimed at feature extraction and data organization inside a GIS environment that can be useful to manage topographic surveys, archaeological surveys and other descriptive data necessary for global archaeological site comprehension and description.
Geomatics Applications in Archaelogy: Map Production from Satellite Data in Karima, North Sudan
PEROTTI, Luigi;MARTINOTTI, Giorgio;BORGOGNO MONDINO, ENRICO CORRADO
2008-01-01
Abstract
In this work, a possible approach, based on satellite remote sensing images and Geomatics techniques, useful to support the archaeological missions is presented. Archaeologists often suffers from lack of updated great scale maps needed to georeference and manage observations coming from the field. Furthermore they long for updated aerial or satellite images useful for extraction of indications about possible hidden elements, or for deduction about the general contest in which their digging is placed.For this work QuickBird and TERRA Aster data were acquired to produce an orthoimage of a specific area near Karima in Nubian Sudan. Aster stereo acquisition capability was used to generate an approximate Digital Surface Model that was used to carried out the orthoprojection of the QuickBird image. A GPS survey was performed to collect the Ground Control Points and the Check Points respectively needed for image exterior orientation and for metric quality evaluation of the final product.The resulting orthoimage was useful to drive to a common reference system all the existing field surveys and to check about eventual limits and evident relative position anomalies. In addition the spectral properties of the multispectral bands of the Quickbird orthoimage were exploited to guess information about the presence of evidences of possible hidden archaeological features .Some geophysical investigations were performed in December 2006 through a geo-radar and magnetic inspection approaches. Some refining operations are planned for the very next future: - a GPS PPP (Precision Point Positioning) survey aimed at defining a better absolute reference system; - a refined orthoprojection of the Quickbird image based on the Ground Control Points surveyed by GPS PPP; - a deeper image processing aimed at feature extraction and data organization inside a GIS environment that can be useful to manage topographic surveys, archaeological surveys and other descriptive data necessary for global archaeological site comprehension and description.
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