Video transects with habitat characterisation from Wight-Barfleur Reef SCI

Video transects with habitat characterisation from Wight-Barfleur Reef SCI (CEND 03/13). ArcGIS line feature class. Video transects with habitat characterisation across Wight-Barfleur Reef candidate Special Area of Conservation (cSAC)
Video footage was collected during the following survey:
Survey of Wight-Barfleur Reef cSAC aboard RV Cefas Endeavour, cruise code CEND0313, between 18/03/2013 and 27/03/2013
Survey of Wight-Barfleur Extension rMCZ aboard RV Cefas Endeavour, cruise code CEND0312, between 27/02/2012 and 28/02/2012
In addition, data extracted from selected video samples (i.e., thosefalling inside the Wight-BarfleurReefcSAC boundary) acquired during the following survey were also included in analyses:
Survey for the project 'Broadscale mapping of hard substrates in the central English Channel' (ME1102), conducted aboard RV Cefas Endeavour, cruise code CEND1406, between 03/08/2006 and 06/08/2006
In total,174 videosamples were interpreted, 123 from CEND0313, 29 from CEND0312, and 22 from CEND1406. A drop-camera was used in all three survey; the position reference point for coordinates was the side gantry. Video transects were plotted by joining the position coordinates of all sequential still images taken within each video sample. Drop-camera deployments lasted a minimum of 10 minutes, with the vessel executing a controlled drift at ~ 0.5 knots (~0.25 ms?1) across a 50 m bullring centred on the sampling station. Still images were captured at regular one minute intervals and opportunistically if specific features of interest were encountered. The camera was deployed from the side gantry, with the height of the camera off the seabed being controlled by a winch operator with sight of the video monitor.

本数据集收录了来自怀特-巴尔弗勒礁（Wight-Barfleur Reef）的带生境特征的视频剖面数据，数据来源于科学监测机构（SCI）CEND 03/13项目。数据以ArcGIS线要素类格式存储，覆盖了怀特-巴尔弗勒礁拟定的特别保护区（cSAC）的生境特征视频剖面。视频素材采集于以下考察活动期间：

- RV Cefas Endeavour号船上的怀特-巴尔弗勒礁cSAC考察，航次代码CEND0313，时间介于2013年3月18日至3月27日。
- RV Cefas Endeavour号船上的怀特-巴尔弗勒礁扩展区域rMCZ考察，航次代码CEND0312，时间介于2012年2月27日至2月28日。

此外，还纳入了以下考察期间从选定的视频样本中提取的数据（即位于怀特-巴尔弗勒礁cSAC边界内的样本）进行分析：

- “英吉利海峡中部硬质底质大范围制图”项目（ME1102）的考察，RV Cefas Endeavour号船，航次代码CEND1406，时间介于2006年8月3日至8月6日。

总计解读了174个视频样本，其中123个来自CEND0313，29个来自CEND0312，22个来自CEND1406。三次考察均使用了投放式摄像机；坐标位置参考点为侧甲板。通过连接每个视频样本内所有连续静止图像的位置坐标，绘制了视频剖面。投放式摄像机投放持续至少10分钟，期间船只以约0.5节（约0.25米/秒）的速度在以采样站为中心的50米圆圈内进行受控漂流。静止图像以每分钟一次的规律间隔捕捉，并在遇到特定感兴趣特征时进行机会性捕捉。摄像机由侧甲板投放，摄像机距海底的高度由负责观察视频监视器的绞车操作员控制。