Semi-automated detection of looting in Afghanistan using multispectral imagery and principal component analysis

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Abstract

High-resolution satellite imagery has proved to be a powerful tool for calculating the extent of looting at heritage sites in conflict zones around the world. Monitoring damage over time, however, has been largely dependent upon laborious and error-prone manual comparisons of satellite imagery taken at different dates. The semi-automated detection process presented here offers a more expedient and accurate method for monitoring looting activities over time, as evidenced at the site of Ai Khanoum in Afghanistan. It is hoped that this method, which relies upon multispectral imagery and principal component analysis, may be adapted to great effect for use in other areas where heritage loss is of significant concern.

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Mapping patterns of long-term settlement in Northern Mesopotamia at a large scale.

B. H. Menze, J. A. Ur (2012)

The landscapes of the Near East show both the first settlements and the longest trajectories of settlement systems. Mounding is a characteristic property of these settlement sites, resulting from millennia of continuing settlement activity at distinguished places. So far, however, this defining feature of ancient settlements has not received much attention, or even been the subject of systematic evaluation. We propose a remote sensing approach for comprehensively mapping the pattern of human settlement at large scale and establish the largest archaeological record for a landscape in Mesopotamia, mapping about 14,000 settlement sites--spanning eight millennia--at 15-m resolution in a 23,000-km(2) area in northeastern Syria. To map both low- and high-mounded places--the latter of which are often referred to as "tells"--we develop a strategy for detecting anthrosols in time series of multispectral satellite images and measure the volume of settlement sites in a digital elevation model. Using this volume as a proxy to continued occupation, we find a dependency of the long-term attractiveness of a site on local water availability, but also a strong relation to the relevance within a basin-wide exchange network that we can infer from our record and third millennium B.C. intersite routes visible on the ground until recent times. We believe it is possible to establish a nearly comprehensive map of human settlements in the fluvial plains of northern Mesopotamia and beyond, and site volume may be a key quantity to uncover long-term trends in human settlement activity from such a record.

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Patterns of looting in southern Iraq

Elizabeth C. Stone (2008)

The archaeological sites of Iraq, precious for their bearing on human history, became especially vulnerable to looters during two wars. Much of the looting evidence has been anecdotal up to now, but here satellite imagery has been employed to show which sites were looted and when. Sites of all sizes from late Uruk to early Islamic were targeted for their high value artefacts, particularly just before and after the 2003 invasion. The author comments that the ‘total area looted … was many times greater than all the archaeological investigations ever conducted in southern Iraq and must have yielded tablets, coins, cylinder seals, statues, terracottas, bronzes and other objects in the hundreds of thousands’.