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Pacific Coastal and Marine Science Center

California Seafloor Mapping Program


Shows an overview of the blocks for the California state waters mapping project.
Figure 1. Map of Coastal California showing boundaries of "map blocks" for which comprehensive seafloor map products will be developed. Full-size Image(220 Kb)

Objective — create a comprehensive coastal/marine bathymetric, geologic, and habitat base map series for all state waters (MHHW - 3nm).

State Funding — 2006 Safe Drinking Water, Water Quality and Supply, Flood Control, River and Coastal Protection Bond Act of 2006 (Proposition 84).

Federal Funding — NOAA National Ocean Service, Office of Coast Surveys; U.S. Geological Survey Coastal and Marine Geology Program; and American Recovery and Reinvestment Act.

Basic Components

Bathymetry and Backscatter Data Collection — ship-based, high-resolution sonar data collection for all parts of the coast unmapped as of 2008, about 80% of California’s mainland waters. Visit progress page.

Data ground-truthing — video, still photography, or physical sampling of the seafloor. Visit progress page.

Subbottom profiling — high-resolution, seismic-reflection profiling to determine thickness and distribution of sediment and other geologic units, locations of active faults and folds, submarine landslides, and other features. Visit progress page.

GIS Data and Map Production — creation of GIS databases and multi-sheet folio map sets (1:24,000 scale), which will include bathymetry, geologic and habitat interpretation maps spanning the entire California land/sea margin. Visit map sheets page.

Data Management and Dissemination — creation of an online data repository for the public dissemination of all digital data and map products covering the California state waters. Visit GIS data & metadata page.


For more information, contact Guy Cochrane or Sam Johnson.

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