NOAA TIFF Image - 4m Bathymetric Principal Component Analysis (PCA) of Red Snapper Research Areas in the South Atlantic Bight, 2010

This dataset contains unified Bathymetric PCA GeoTiffs with 4x4 meter cell resolution describing the topography of 15 areas along the shelf edge off the South Atlantic Bight where NOAA South East Fisheries Independent Survey (SEFIS) are conducting research on Red Snapper (lutjanus campechanus). The multibeam data covers a total of 232 sq km and was collected in 2010 by the NOAA Ship Nancy Foster with a hull-mounted Kongsberg Simrad EM 1002 multibeam echo sounder (95 kHz). It was processed by NOAA's NOS/NCCOS/CCMA Biogeography Branch using CARIS HIPS 7.1 software. Data has all correctors applied (attitude, sound velocity) and has been reduced to mean lower low water (MLLW) using final approved tides and zoning from NOAA COOPS. The processed CARIS data was used to generate a CARIS BASE surface using CUBE. The CARIS export option "BASE Surface to ASCII" was then used to create a GeoTiff of the priority areas in ArcGIS 10. The Principal Component Analysis image was created in ENVI 4.8 using the metrics depth, mean depth, curvature, plan curvature, profile curvature, rugosity, slope and slope of the slope.

本数据集包含统一化的水深主成分分析（Principal Component Analysis, PCA）GeoTiff数据，单元格分辨率为4×4米，用于刻画南大西洋湾陆架边缘沿线15个区域的地形地貌。上述区域为美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration, NOAA）东南渔业独立调查（Southeast Fisheries Independent Survey, SEFIS）开展红鳍笛鲷（*Lutjanus campechanus*）相关研究的作业海域。该多波束数据总覆盖面积达232平方公里，于2010年由NOAA“南希·福斯特”号科考船搭载船底安装的Kongsberg Simrad EM 1002多波束测深仪（95 kHz）采集获取。数据由NOAA下属的NOS/NCCOS/CCMA生物地理学分支团队使用CARIS HIPS 7.1软件完成处理，已施加全部必要校正（包括姿态校正、声速校正），并结合NOAA COOPS最终批准的潮汐数据与分区信息，将高程基准统一至平均低低潮面（Mean Lower Low Water, MLLW）。处理后的CARIS数据通过CUBE软件生成CARIS BASE曲面，随后通过CARIS的"BASE Surface to ASCII"导出选项，结合ArcGIS 10软件生成优先级区域的GeoTiff数据。本数据集的主成分分析影像是基于水深、平均水深、曲率、平面曲率、剖面曲率、粗糙度、坡度以及坡度变化率共8项指标，在ENVI 4.8软件中生成的。