Bathymetry--Offshore of Fort Ross, California

This part of DS 781 presents data for the bathymetry and shaded-relief maps of the Offshore of Fort Ross map area, California. Raster data file is included in "Bathymetry_OffshoreFortRoss.zip," which is accessible from http://pubs.usgs.gov/ds/781/OffshoreFortRoss/data_catalog_OffshoreFortRoss.html. The bathymetry and shaded-relief maps of the Offshore of Fort Ross Map Area, California, were generated from bathymetry data collected by California State University, Monterey Bay (CSUMB), and by Fugro Pelagos. Mapping was completed between 2007 and 2010, using a combination of 200-kHz and 400-kHz Reson 7125, and 244-kHz Reson 8101 multibeam echosounders, as well as 468-kHz SEA SWATHPlus interferometric system. These mapping missions combined to collect bathymetry from about the 10-m isobath to beyond the 3-nautical-mile limit of California's State Waters. NOTE: the horizontal datum of the bathymetry data (NAD83) differs from the horizontal datum of other layers in this SIM (WGS84). These data are not intended for navigational purposes.本数据集（DS 781）的此部分提供了加利福尼亚州罗斯堡近海制图区的水深与晕渲地形图数据。相关栅格数据文件存储于"Bathymetry_OffshoreFortRoss.zip"压缩包内，可通过链接http://pubs.usgs.gov/ds/781/OffshoreFortRoss/data_catalog_OffshoreFortRoss.html获取。加利福尼亚州罗斯堡近海制图区的水深及晕渲地形图，由加州州立大学蒙特雷湾分校（California State University, Monterey Bay, CSUMB）与Fugro Pelagos采集的水深数据生成。制图工作于2007年至2010年间完成，所用测绘设备涵盖200kHz与400kHz频段的Reson 7125多波束测深仪、244kHz频段的Reson 8101多波束测深仪，以及468kHz频段的SEA SWATHPlus干涉测深系统。本次联合测绘任务共采集了约10米等深线至加利福尼亚州水域3海里界限以外区域的水深数据。注意：本次水深数据的水平基准面为NAD83，与本SIM中其他图层的水平基准面WGS84不一致。此类数据不得用于导航用途。