Data acquisition, post-processing, and final products derived from bathymetry data were handled by the Seafloor Mapping Lab at CSUMB and submitted to Fugro Pelagos for inclusion in the San Francisco Bay Habitat Mapping project. KGPS altitude data were used to account for tide cycle fluctuations and sound velocity profiles were collected with YSI Castaway CTDs. An Applanix Position and Orientation System, Marine Vessel (POS MV 320 v4) system was used on the RV MacGinitie and a Wavemaster on the RV Kelpfly to provide position and attitude data during data collection and accounted for vessel motion such as heave, pitch, and roll (position accuracy 2m, pitch, roll and heading accuracy +/-0.02 degrees, heave accuracy +/-5% or 5cm).
Prior to data collection, a series of planned survey lines were created using the survey navigation and planning software HYPACK (Hypack, Inc). The blocks represent the priority areas determined by the project partners and were arranged to avoid areas where data had already been collected. Ten survey blocks in Area B were acquired with the Bathyswath sonar and the bathymetric products are organized by these blocks. Survey data from a combination of multi-beam and interferometric sonars, including the imagery and the bathymetry, will support OPC's goals as well as assist with NOAA's mandate for port and harbor maintenance (dredging), coastal engineering (beach erosion and replenishment studies), and coastal zone management. Title: Deputy Director, Ocean Protection CouncilĮmail: primary purpose of this San Francisco Bay habitat mapping acquisition is to provide the California Ocean Protection Council (OPC), as required for the California Seafloor Mapping Program (CSMP), high-resolution accurately positioned sonar imagery data of San Francisco Bay coastal and near shore waters to delineate marine habitat types. Both of these platforms were well suited to acquire data in the very shallow subtidal areas of the bay.Ĭontact Org: Ocean Protection Council (OPC) Interferometric sidescan bathymetry data were acquired using a 468 kHz Bathyswath sonar system aboard the RV MacGinitie and RV Kelpfly. An earlier project had been completed to map the very-shallow subtidal and intertidal areas using optical methods. These data were collected as source material for planned benthic habitat mapping. All of these blocks were surveyed with 100% cover of backscatter imagery. Bathymetric and acoustic backscatter data were collected simultaneously in 10 survey blocks. High resolution sonar data were collected over ultra-shallow areas of the San Francisco Bay estuary system. San Francisco Bay Interferometric Bathymetry: Area B