Journal
JOURNAL OF ARCHAEOLOGICAL SCIENCE
Volume 69, Issue -, Pages 64-74Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jas.2016.04.011
Keywords
Settlement patterns; Monumental architecture; LiDAR remote sensing; Automated featured extraction; Kingdom of Tonga; Grave mounds; Landscape archaeology
Funding
- Social Sciences and Humanities Research Council of Canada (SSHRC) [752-2014-1891]
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Recent LiDAR (Light Detection and Ranging) survey in Tonga has documented a dense and complex archaeological landscape, particularly on the principal island of Tongatapu. Among the features revealed by the LiDAR are a profusion of earthen mounds, most of which are associated with residence, sporting, or burial in the period 1000-1850 CE. For identification and mapping of the mounds we use and evaluate two automated feature extraction (AFE) techniques, object-based image analysis and an inverted pit filling algorithm (iMound). Accuracy of these methods was measured using an F1-score (harmonic mean of precision and recall). Variable AFE results indicate that continual and iterative fine-tuning is required. Successful mapping of some 10,000 mounds on Tongatapu reveals a distinct spatial structure that relates to traditional land division and tenure. (C) 2016 Elsevier Ltd. All rights reserved.
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