Use of Photogrammetry for Non-Disturbance Underwater Survey: An Analysis of In Situ Stone Anchors

Stone anchors comprise a significant portion of observable underwater cultural heritage in the Mediterranean and provide evidence for trade networks as early as the Bronze Age. Full documentation of these anchors, however, often requires their removal from their underwater environment, especially to...

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Main Authors: Fulton, C., Viduka, A., Hutchison, A., Hollick, J, Woods, A., Sewell, D., Manning, S.
Format: Journal Article
Published: Society for American Archaeology 2016
Online Access:http://hdl.handle.net/20.500.11937/15269
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author Fulton, C.
Viduka, A.
Hutchison, A.
Hollick, J
Woods, A.
Sewell, D.
Manning, S.
author_facet Fulton, C.
Viduka, A.
Hutchison, A.
Hollick, J
Woods, A.
Sewell, D.
Manning, S.
author_sort Fulton, C.
building Curtin Institutional Repository
collection Online Access
description Stone anchors comprise a significant portion of observable underwater cultural heritage in the Mediterranean and provide evidence for trade networks as early as the Bronze Age. Full documentation of these anchors, however, often requires their removal from their underwater environment, especially to calculate mass. We offer a methodology for using photogrammetry to record stone anchors still in situ and calculate their approximate mass. We compare measurements derived using measuring tapes with those derived using two different software programs for photogrammetric analysis, PhotoModeler Scanner (Eos Systems, Inc.) and PhotoScan Pro (Agisoft). First, we analyze stone anchors that had previously been removed from the underwater environment to establish a reference methodology. Next, we implement this methodology in an underwater survey off the southern coastline of Cyprus. Linear measurements for both programs correlate closely with those attained via measuring tape. The resulting estimates of volume of anchors in situ and on land are slightly greater using the photogrammetric methodology than the reference volumes obtained using a water displacement methodology. Overall, as an analytical tool, this methodology generates detailed surface information in minimal time underwater and preserves data for future analysis without necessitating the removal of the anchor from its underwater environment.
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publishDate 2016
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spelling curtin-20.500.11937-152692017-09-13T16:11:34Z Use of Photogrammetry for Non-Disturbance Underwater Survey: An Analysis of In Situ Stone Anchors Fulton, C. Viduka, A. Hutchison, A. Hollick, J Woods, A. Sewell, D. Manning, S. Stone anchors comprise a significant portion of observable underwater cultural heritage in the Mediterranean and provide evidence for trade networks as early as the Bronze Age. Full documentation of these anchors, however, often requires their removal from their underwater environment, especially to calculate mass. We offer a methodology for using photogrammetry to record stone anchors still in situ and calculate their approximate mass. We compare measurements derived using measuring tapes with those derived using two different software programs for photogrammetric analysis, PhotoModeler Scanner (Eos Systems, Inc.) and PhotoScan Pro (Agisoft). First, we analyze stone anchors that had previously been removed from the underwater environment to establish a reference methodology. Next, we implement this methodology in an underwater survey off the southern coastline of Cyprus. Linear measurements for both programs correlate closely with those attained via measuring tape. The resulting estimates of volume of anchors in situ and on land are slightly greater using the photogrammetric methodology than the reference volumes obtained using a water displacement methodology. Overall, as an analytical tool, this methodology generates detailed surface information in minimal time underwater and preserves data for future analysis without necessitating the removal of the anchor from its underwater environment. 2016 Journal Article http://hdl.handle.net/20.500.11937/15269 10.7183/2326-3768.4.1.17 Society for American Archaeology fulltext
spellingShingle Fulton, C.
Viduka, A.
Hutchison, A.
Hollick, J
Woods, A.
Sewell, D.
Manning, S.
Use of Photogrammetry for Non-Disturbance Underwater Survey: An Analysis of In Situ Stone Anchors
title Use of Photogrammetry for Non-Disturbance Underwater Survey: An Analysis of In Situ Stone Anchors
title_full Use of Photogrammetry for Non-Disturbance Underwater Survey: An Analysis of In Situ Stone Anchors
title_fullStr Use of Photogrammetry for Non-Disturbance Underwater Survey: An Analysis of In Situ Stone Anchors
title_full_unstemmed Use of Photogrammetry for Non-Disturbance Underwater Survey: An Analysis of In Situ Stone Anchors
title_short Use of Photogrammetry for Non-Disturbance Underwater Survey: An Analysis of In Situ Stone Anchors
title_sort use of photogrammetry for non-disturbance underwater survey: an analysis of in situ stone anchors
url http://hdl.handle.net/20.500.11937/15269