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Roelfsema, Christiaan M; Kovacs, Eva M; Stetner, Douglas; Phinn, Stuart R (2018): Georeferenced benthic photoquadrats captured annually from 2002-2017, distributed over Heron Reef flat and slope areas [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.894801

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Abstract:
Underwater georeferenced photo-transect surveys were conducted at different locations and using slightly different methodologies. Photoquadrats were collected with the purpose of determination of the benthic composition of each photoquadrat for subsequent use as georeferenced field data for calibration and validation purposes of benthic habitat maps derived from remote sensing satellite or airborne imagery. Transect location, direction and depth were chosen to characterise the variation of benthic cover types represented on coral reefs. Photoquadrat interval along the transects was chosen to reflect the resolution of the satellite image data types used.
In principle a diver or snorkeler captures a photoquadrat (approximate 1 m2 footprint) of the bottom along a transect at 2 - 3 m intervals. Images were assigned a GPS coordinate and analysed for benthic composition.
Initially, from 2002 to 2006, divers/snorkelers swam along a 50 m transect tape. Coordinates were recorded at the beginning and end of the tape. Knowing the horizontal distance interval between photoquadrats the coordinates could be approximated for each image.
From 2007 to 2017, divers/snorkelers towed a floating GPS at the surface which was logging position. The coordinates of each photoquadrat were synchronised based on the timestamp of the photoquadrat and the GPS timestamp, using specialised software (e.g. GPS Photo Link www.geospatialexperts.com or DNR Garmin). In principle 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. The camera lens provided a 1 m x 1 m footprint, at a 0.5 m height above the benthos using a plumb line. Horizontal distance between photoquadrats was estimated by fin kicks of the surveyor, and corresponded to a surface distance of approximately 2 - 4 m.
For these surveys, the snorkelers traversed a pre-determined transect 250-1000 m in length, varying depending on heterogeneity of the area covered. Divers would conduct 30 min dives along a 5m depth contour, which would be approximately 500-700 m in length.
Related to:
Roelfsema, Christiaan M; Kovacs, Eva M; Markey, Kathryn; Phinn, Stuart R (2018): Benthic and substrate cover data derived from field photo-transect surveys for the Cairns to Cooktown management region of the Great Barrier Reef (GBR), January and April/May 2017. PANGAEA, https://doi.org/10.1594/PANGAEA.892623
Roelfsema, Christiaan M; Kovacs, Eva M; Markey, Kathryn; Phinn, Stuart R (2018): Benthic and substrate cover data derived from field photo-transect surveys from Curd Reef in the Far Northern management region of the Great Barrier Reef. PANGAEA, https://doi.org/10.1594/PANGAEA.891711
Roelfsema, Christiaan M; Kovacs, Eva M; Phinn, Stuart R (2015): Field data sets for seagrass biophysical properties for the Eastern Banks, Moreton Bay, Australia, 2004–2014. Scientific Data, 2, 150040, https://doi.org/10.1038/sdata.2015.40
Roelfsema, Christiaan M; Lyons, Mitchell B; Dunbabin, Matthew; Kovacs, Eva M; Phinn, Stuart R (2015): Integrating field survey data with satellite image data to improve shallow water seagrass maps: the role of AUV and snorkeller surveys? Remote Sensing Letters, 6(2), 135-144, https://doi.org/10.1080/2150704X.2015.1013643
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
Roelfsema, Christiaan M; Phinn, Stuart R (2010): Integrating field data with high spatial resolution multispectral satellite imagery for calibration and validation of coral reef benthic community maps. Journal of Applied Remote Sensing, 4(1), 043527, https://doi.org/10.1117/1.3430107
Coverage:
Median Latitude: -23.444650 * Median Longitude: 151.937586 * South-bound Latitude: -23.473406 * West-bound Longitude: 151.902207 * North-bound Latitude: -23.428347 * East-bound Longitude: 151.997829
Date/Time Start: 2002-11-04T00:00:00 * Date/Time End: 2018-11-16T00:00:00
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
32 datasets

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Datasets listed in this publication series

  1. Roelfsema, CM; Kovacs, EM; Stetner, D et al. (2018): Georeferenced photographs of benthic photoquadrats acquired along transects from Heron Reef flat and slope areas (2002-11). https://doi.org/10.1594/PANGAEA.895556
  2. Roelfsema, CM; Kovacs, EM; Stetner, D et al. (2018): Georeferenced photographs of benthic photoquadrats acquired along transects from Heron Reef flat and slope areas (2004-03, 2004-05). https://doi.org/10.1594/PANGAEA.895557
  3. Roelfsema, CM; Kovacs, EM; Stetner, D et al. (2018): Georeferenced photographs of benthic photoquadrats acquired along transects from Heron Reef flat and slope areas (2005-05). https://doi.org/10.1594/PANGAEA.894796
  4. Roelfsema, CM; Kovacs, EM; Stetner, D et al. (2018): Georeferenced photographs of benthic photoquadrats acquired along transects from Heron Reef flat and slope areas (2006-06). https://doi.org/10.1594/PANGAEA.895558
  5. Roelfsema, CM; Kovacs, EM; Stetner, D et al. (2018): Georeferenced photographs of benthic photoquadrats acquired along transects from Heron Reef flat and slope areas (2007-09). https://doi.org/10.1594/PANGAEA.895563
  6. Roelfsema, CM; Kovacs, EM; Stetner, D et al. (2018): Georeferenced photographs of benthic photoquadrats acquired along transects from Heron Reef flat and slope areas (2008-10). https://doi.org/10.1594/PANGAEA.895569
  7. Roelfsema, CM; Kovacs, EM; Stetner, D et al. (2018): Georeferenced photographs of benthic photoquadrats acquired along transects from Heron Reef flat and slope areas (2009-11). https://doi.org/10.1594/PANGAEA.895570
  8. Roelfsema, CM; Kovacs, EM; Stetner, D et al. (2018): Georeferenced photographs of benthic photoquadrats acquired along transects from Heron Reef flat and slope areas (2010-11). https://doi.org/10.1594/PANGAEA.894797
  9. Roelfsema, CM; Kovacs, EM; Stetner, D et al. (2018): Georeferenced photographs of benthic photoquadrats acquired along transects from Heron Reef flat and slope areas (2011-11). https://doi.org/10.1594/PANGAEA.895157
  10. Roelfsema, CM; Kovacs, EM; Stetner, D et al. (2018): Georeferenced photographs of benthic photoquadrats acquired along transects from Heron Reef flat and slope areas (2012-07). https://doi.org/10.1594/PANGAEA.895121
  11. Roelfsema, CM; Kovacs, EM; Stetner, D et al. (2018): Georeferenced photographs of benthic photoquadrats acquired along transects from Heron Reef flat and slope areas (2013-11). https://doi.org/10.1594/PANGAEA.895160
  12. Roelfsema, CM; Kovacs, EM; Stetner, D et al. (2018): Georeferenced photographs of benthic photoquadrats acquired along transects from Heron Reef flat and slope areas (2014-11). https://doi.org/10.1594/PANGAEA.895124
  13. Roelfsema, CM; Kovacs, EM; Stetner, D et al. (2018): Georeferenced photographs of benthic photoquadrats acquired along transects from Heron Reef flat and slope areas (2015-11). https://doi.org/10.1594/PANGAEA.895147
  14. Roelfsema, CM; Kovacs, EM; Stetner, D et al. (2018): Georeferenced photographs of benthic photoquadrats acquired along transects from Heron Reef flat and slope areas (2016-09). https://doi.org/10.1594/PANGAEA.894800
  15. Roelfsema, CM; Kovacs, EM; Stetner, D et al. (2018): Georeferenced photographs of benthic photoquadrats acquired along transects from Heron Reef flat and slope areas (2017-11). https://doi.org/10.1594/PANGAEA.895154
  16. Roelfsema, CM; Kovacs, EM; Stetner, D et al. (2019): Georeferenced photographs of benthic photoquadrats acquired along transects from Heron Reef flat and slope areas (2018-11). https://doi.org/10.1594/PANGAEA.899670
  17. Roelfsema, CM; Kovacs, EM; Markey, K et al. (2019): Benthic and substrate cover data derived from field photo-transect surveys for the Heron Reef flat and slope areas (2002-11). https://doi.org/10.1594/PANGAEA.907025
  18. Roelfsema, CM; Kovacs, EM; Markey, K et al. (2019): Benthic and substrate cover data derived from field photo-transect surveys for the Heron Reef flat and slope areas (2004-03, 2004-05). https://doi.org/10.1594/PANGAEA.903850
  19. Roelfsema, CM; Kovacs, EM; Markey, K et al. (2019): Benthic and substrate cover data derived from field photo-transect surveys for the Heron Reef flat and slope areas (2005-05). https://doi.org/10.1594/PANGAEA.903851
  20. Roelfsema, CM; Kovacs, EM; Markey, K et al. (2019): Benthic and substrate cover data derived from field photo-transect surveys for the Heron Reef flat and slope areas (2006-06). https://doi.org/10.1594/PANGAEA.903847
  21. Roelfsema, CM; Kovacs, EM; Markey, K et al. (2019): Benthic and substrate cover data derived from field photo-transect surveys for the Heron Reef flat and slope areas (2008-10). https://doi.org/10.1594/PANGAEA.903788
  22. Roelfsema, CM; Kovacs, EM; Markey, K et al. (2019): Benthic and substrate cover data derived from field photo-transect surveys for the Heron Reef flat and slope areas (2007-09). https://doi.org/10.1594/PANGAEA.903779
  23. Roelfsema, CM; Kovacs, EM; Markey, K et al. (2019): Benthic and substrate cover data derived from field photo-transect surveys for the Heron Reef flat and slope areas (2009-11). https://doi.org/10.1594/PANGAEA.903782
  24. Roelfsema, CM; Kovacs, EM; Markey, K et al. (2019): Benthic and substrate cover data derived from field photo-transect surveys for the Heron Reef flat and slope areas (2010-11). https://doi.org/10.1594/PANGAEA.903784
  25. Roelfsema, CM; Kovacs, EM; Markey, K et al. (2019): Benthic and substrate cover data derived from field photo-transect surveys for the Heron Reef flat and slope areas (2011-11). https://doi.org/10.1594/PANGAEA.904704
  26. Roelfsema, CM; Kovacs, EM; Markey, K et al. (2019): Benthic and substrate cover data derived from field photo-transect surveys for the Heron Reef flat and slope areas (2012-07). https://doi.org/10.1594/PANGAEA.904706
  27. Roelfsema, CM; Kovacs, EM; Markey, K et al. (2019): Benthic and substrate cover data derived from field photo-transect surveys for the Heron Reef flat and slope areas (2013-11). https://doi.org/10.1594/PANGAEA.904710
  28. Roelfsema, CM; Kovacs, EM; Markey, K et al. (2019): Benthic and substrate cover data derived from field photo-transect surveys for the Heron Reef flat and slope areas (2014-11). https://doi.org/10.1594/PANGAEA.904715
  29. Roelfsema, CM; Kovacs, EM; Markey, K et al. (2019): Benthic and substrate cover data derived from field photo-transect surveys for the Heron Reef flat and slope areas (2015-11). https://doi.org/10.1594/PANGAEA.904716
  30. Roelfsema, CM; Kovacs, EM; Markey, K et al. (2019): Benthic and substrate cover data derived from field photo-transect surveys for the Heron Reef flat and slope areas (2016-09). https://doi.org/10.1594/PANGAEA.907013
  31. Roelfsema, CM; Kovacs, EM; Markey, K et al. (2019): Benthic and substrate cover data derived from field photo-transect surveys for the Heron Reef flat and slope areas (2017-11). https://doi.org/10.1594/PANGAEA.903766
  32. Roelfsema, CM; Kovacs, EM; Markey, K et al. (2019): Benthic and substrate cover data derived from field photo-transect surveys for the Heron Reef flat and slope areas (2018-11). https://doi.org/10.1594/PANGAEA.903767