Since the start of the Syrian civil war in 2011, the rich archaeological heritage of Syria and northern Iraq has faced severe threats, including looting, combat-related damage, and intentional demolition of monuments. However, the inaccessibility of the conflict zone to archaeologists or cultural heritage specialists has made it difficult to produce accurate damage assessments, impeding efforts to develop mitigation strategies and policies. This paper presents results of a project, undertaken in collaboration with the American Schools of Oriental Research (ASOR) and the US Department of State, to monitor damage to archaeological sites in Syria, northern Iraq, and southern Turkey using recent, high-resolution satellite imagery. Leveraging a large database of archaeological and heritage sites throughout the region, as well as access to continually updated satellite imagery from DigitalGlobe, this project has developed a flexible and efficient methodology to log observations of damage in a manner that facilitates spatial and temporal queries. With nearly 5000 sites carefully evaluated, analysis reveals unexpected patterns in the timing, severity, and location of damage, helping us to better understand the evolving cultural heritage crisis in Syria and Iraq. Results also offer a model for future remote sensing-based archaeological and heritage monitoring efforts in the Middle East and beyond.

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Satellite imagery-based monitoring of archaeological site damage in the Syrian civil war.

https://works.bepress.com/rebecca-seifried/6/download/

Remote assessments of the archaeological heritage situation in Afghanistan

The American Schools of Oriental Research Cultural Heritage Initiatives (ASOR CHI) continues to address the cultural heritage crisis in Syria and Northern Iraq by: (1) monitoring, reporting, and fact-finding; (2) promoting global awareness; and (3) conducting emergency response projects and developing post-conflict rehabilitation plans. As part of this mission, ASOR CHI, through a public–government collaboration with the United States of America (US) Department of State, has been provided with access to hundreds of thousands of satellite images, some within 24 h of the image being taken, in order to assess reports of damage to cultural heritage sites, to discover unreported damage, and to evaluate the impacts of such incidents. This work is being done across an inventory of over 13,000 cultural heritage sites in the affected regions. The available dataset of satellite imagery is significantly larger than the scales that geospatial specialists within archaeology have dealt with in the past. This has necessitated a rethinking of how the project uses satellite imagery and how ASOR CHI and future projects can more effectively undertake the important work of cultural heritage monitoring and damage assessment.

The American Schools of Oriental Research Cultural Heritage Initiatives: Monitoring Cultural Heritage in Syria and Northern Iraq by Geospatial Imagery

Illegal excavations in archaeological heritage sites (namely “looting”) are a global phenomenon. Satellite images are nowadays massively used by archaeologists to systematically document sites affected by looting. In parallel, remote sensing scientists are increasingly developing processing methods with a certain degree of automation to quantify looting using satellite imagery. To capture the state-of-the-art of this growing field of remote sensing, in this work 47 peer-reviewed research publications and grey literature are reviewed, accounting for: (i) the type of satellite data used, i.e., optical and synthetic aperture radar (SAR); (ii) properties of looting features utilized as proxies for damage assessment (e.g., shape, morphology, spectral signature); (iii) image processing workflows; and (iv) rationale for validation. Several scholars studied looting even prior to the conflicts recently affecting the Middle East and North Africa (MENA) region. Regardless of the method used for looting feature identification (either visual/manual, or with the aid of image processing), they preferred very high resolution (VHR) optical imagery, mainly black-and-white panchromatic, or pansharpened multispectral, whereas SAR is being used more recently by specialist image analysts only. Yet the full potential of VHR and high resolution (HR) multispectral information in optical imagery is to be exploited, with limited research studies testing spectral indices. To fill this gap, a range of looted sites across the MENA region are presented in this work, i.e., Lisht, Dashur, and Abusir el Malik (Egypt), and Tell Qarqur, Tell Jifar, Sergiopolis, Apamea, Dura Europos, and Tell Hizareen (Syria). The aim is to highlight: (i) the complementarity of HR multispectral data and VHR SAR with VHR optical imagery, (ii) usefulness of spectral profiles in the visible and near-infrared bands, and (iii) applicability of methods for multi-temporal change detection. Satellite data used for the demonstration include: HR multispectral imagery from the Copernicus Sentinel-2 constellation, VHR X-band SAR data from the COSMO-SkyMed mission, VHR panchromatic and multispectral WorldView-2 imagery, and further VHR optical data acquired by GeoEye-1, IKONOS-2, QuickBird-2, and WorldView-3, available through Google Earth. Commonalities between the different image processing methods are examined, alongside a critical discussion about automation in looting assessment, current lack of common practices in image processing, achievements in managing the uncertainty in looting feature interpretation, and current needs for more dissemination and user uptake. Directions toward sharing and harmonization of methodologies are outlined, and some proposals are made with regard to the aspects that the community working with satellite images should consider, in order to define best practices of satellite-based looting assessment.

Detection of Archaeological Looting from Space: Methods, Achievements and Challenges

While periods of war have always seen cultural heritage placed at risk, the recent rise of ISIS has involved the deliberate targeting of heritage sites as part of a broader strategy towards local communities in Syria and Iraq. Using data collated from social media (Twitter), the authors conducted sentiment analysis of reactions to instances of heritage destruction and repurposing in the Middle East between 2015 and 2016. It is hoped that the insights gained can help the international community better tackle terrorism, protecting heritage and supporting affected communities.

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ISIS and heritage destruction: a sentiment analysis

ASOR Cultural Heritage Initiatives (ASOR CHI) uses a wide range of ground-based observations to report on the cultural heritage situation in Syria and northern Iraq. Coupled with analyses of high-r...

https://www.jstor.org/stable/10.5615/neareastarch.78.3.0132

Michael D. Danti

Papers

Ground-Based Observations of Cultural Heritage Incidents in Syria and Iraq