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Roelfsema, Christiaan M; Grol, Monique; González-Rivero, Manuel; Phinn, Stuart R (2018): Georeferenced photographs of benthic photoquadrats acquired along 63 transects distributed over 12 reefs in the Far North region of the Great Barrier Reef, December, 2017 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.891505

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Published: 2018-06-28 • DOI registered: 2018-07-27

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Abstract:
Underwater georeferenced photo-transect surveys were conducted at different locations: in the shallow waters of the Reef Flat (0.5-2.5m) by a snorkeller, or, along a 5m depth contour of the Reef Slope by a diver. For these surveys, the snorkellers or divers traversed a pre-determined transect 250-1000 m in length, while taking photos of the benthos at a set height using a standard digital camera and towing a surface float GPS which was logging its track every five seconds. The camera lens provided a 1.0 m x 1.0 m footprint, at 0.5 m height above the benthos. Horizontal distance between photoquadrats was estimated by fin kicks of the surveyor, and corresponded to a surface distance of approximately 2.0 - 4.0 m.
The coordinates of each photoquadrat were approximated based on the timestamp of the photoquadrat and the GPS timestamp. Coordinates of each photoquadrat were interpolated by finding the GPS coordinates that were logged at a set time before and after the photoquadrat was captured.
Photoquadrats were collected with the purpose of determination of the benthic composition of each photoquadrat and to subsequently use this georeferenced field data for calibration and validation of benthic habitat maps. Transect location, direction and depth were chosen for this purpose and so as to characterise the variation in benthic cover types present on coral reefs. Photoquadrat interval along the transects was chosen to reflect the resolution of high spatial resolution satellite image data types.
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Related to:
Beijbom, Oscar; Edmunds, Peter J; Roelfsema, Christiaan M; Smith, Jennifer E; Kline, David I; Neal, Benjamin P; Dunlap, Matthew J; Moriarty, Vincent; Fan, Tung-Yung; Tan, Chih-Jui; Chan, Stephen; Treibitz, Tali; Gamst, Anthony; Mitchell, Brian G; Kriegman, David (2015): Towards automated annotation of benthic survey images: Variability of human experts and operational modes of automation. PLoS ONE, 10(7), e0130312, https://doi.org/10.1371/journal.pone.0130312
González-Rivero, Manuel; Beijbom, Oscar; Rodriguez-Ramirez, Alberto; Holtrop, Tadzio; González-Marrero, Yeray; Ganase, Anjani; Roelfsema, Christiaan M; Phinn, Stuart R; Hoegh-Guldberg, Ove (2016): Scaling up ecological measurements of coral reefs using semi-automated field image collection and analysis. Remote Sensing, 8(1), 30, https://doi.org/10.3390/rs8010030
Roelfsema, Christiaan M; Phinn, Stuart R (2009): A manual for conducting georeferenced photo transects surveys to assess the benthos of coral reef and seagrass habitats. Centre for Remote Sensing & Spatial Information Science, School of Geography, Planning & Environmental Management, University of Queensland, Brisbane, Australia, 4072, Vers. 3.0, 1-33 (pdf 1.1 MB), hdl:10013/epic.39998.d001
Coverage:
Median Latitude: -12.235191 * Median Longitude: 143.740588 * South-bound Latitude: -13.990193 * West-bound Longitude: 143.035644 * North-bound Latitude: -10.514772 * East-bound Longitude: 144.540467
Date/Time Start: 2017-11-16T10:42:00 * Date/Time End: 2017-12-04T13:03:05
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
12 datasets

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Datasets listed in this publication series

  1. Roelfsema, CM; Grol, M; González-Rivero, M et al. (2018): Georeferenced photographs of benthic photoquadrats acquired along transects from Curd Reef in the Far North region of the Great Barrier Reef, December, 2017. https://doi.org/10.1594/PANGAEA.891490
  2. Roelfsema, CM; Grol, M; González-Rivero, M et al. (2018): Georeferenced photographs of benthic photoquadrats acquired along transects from Dugong Reef in the Far North region of the Great Barrier Reef, December, 2017. https://doi.org/10.1594/PANGAEA.891491
  3. Roelfsema, CM; Grol, M; González-Rivero, M et al. (2018): Georeferenced photographs of benthic photoquadrats acquired along transects from Great-Detached Reef in the Far North region of the Great Barrier Reef, December, 2017. https://doi.org/10.1594/PANGAEA.891492
  4. Roelfsema, CM; Grol, M; González-Rivero, M et al. (2018): Georeferenced photographs of benthic photoquadrats acquired along transects from Lagoon Reef in the Far North region of the Great Barrier Reef, December, 2017. https://doi.org/10.1594/PANGAEA.891493
  5. Roelfsema, CM; Grol, M; González-Rivero, M et al. (2018): Georeferenced photographs of benthic photoquadrats acquired along transects from Nomad Reef in the Far North region of the Great Barrier Reef, December, 2017. https://doi.org/10.1594/PANGAEA.891494
  6. Roelfsema, CM; Grol, M; González-Rivero, M et al. (2018): Georeferenced photographs of benthic photoquadrats acquired along transects from Tijou Reef in the Far North region of the Great Barrier Reef, December, 2017. https://doi.org/10.1594/PANGAEA.891495
  7. Roelfsema, CM; Grol, M; González-Rivero, M et al. (2018): Georeferenced photographs of benthic photoquadrats acquired along transects from Tydeman Reef in the Far North region of the Great Barrier Reef, December, 2017. https://doi.org/10.1594/PANGAEA.891496
  8. Roelfsema, CM; Grol, M; González-Rivero, M et al. (2018): Georeferenced photographs of benthic photoquadrats acquired along transects from UN10-384 Reef in the Far North region of the Great Barrier Reef, December, 2017. https://doi.org/10.1594/PANGAEA.891497
  9. Roelfsema, CM; Grol, M; González-Rivero, M et al. (2018): Georeferenced photographs of benthic photoquadrats acquired along transects from UN10-416 Reef in the Far North region of the Great Barrier Reef, December, 2017. https://doi.org/10.1594/PANGAEA.891523
  10. Roelfsema, CM; Grol, M; González-Rivero, M et al. (2018): Georeferenced photographs of benthic photoquadrats acquired along transects from UN13061b Reef in the Far North region of the Great Barrier Reef, December, 2017. https://doi.org/10.1594/PANGAEA.891501
  11. Roelfsema, CM; Grol, M; González-Rivero, M et al. (2018): Georeferenced photographs of benthic photoquadrats acquired along transects from Wallace Reef in the Far North region of the Great Barrier Reef, December, 2017. https://doi.org/10.1594/PANGAEA.891502
  12. Roelfsema, CM; Grol, M; González-Rivero, M et al. (2018): Georeferenced photographs of benthic photoquadrats acquired along transects from Wilkie Reef in the Far North region of the Great Barrier Reef, December, 2017. https://doi.org/10.1594/PANGAEA.891503