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
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| Autori principali: | , , , |
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2018
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| _version_ | 1867170473208446976 |
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| author | Roelfsema, Christiaan M Grol, Monique González-Rivero, Manuel Phinn, Stuart R |
| author_facet | Roelfsema, Christiaan M Grol, Monique González-Rivero, Manuel Phinn, Stuart R |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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. As the data is being made available publically prior to publication, for any downloads, please provide the following information to the authours: - Personal details and institution - Provide a brief paragraph as to the intended use of the data. - Cite the data appropriately. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_891505 |
| institution | PANGAEA |
| language | en |
| publishDate | 2018 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | 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 Roelfsema, Christiaan M Grol, Monique González-Rivero, Manuel Phinn, Stuart R 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. As the data is being made available publically prior to publication, for any downloads, please provide the following information to the authours: - Personal details and institution - Provide a brief paragraph as to the intended use of the data. - Cite the data appropriately. |
| title | 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 |
| topic | |
| url | https://doi.org/10.1594/PANGAEA.891505 |