Habitat: Offshore of Tomales Point, California, 2014
Abstract/Contents
- Abstract
- This polygon shapefile depicts potential benthic habitats within the offshore area of Tomales Point, California. Using multibeam echosounder (MBES) bathymetry and backscatter data, potential marine benthic habitat maps were constructed. The habitats were based on substrate types and documented or "ground truthed" using underwater video images and seafloor samples obtained by the USGS. These maps display various habitat types that range from flat, soft, unconsolidated sediment-covered seafloor to hard, deformed (folded), or highly rugose and differentially eroded bedrock exposures. Rugged, high-relief, rocky outcrops that have been eroded to form ledges and small caves are ideal habitat for rockfish (Sebastes spp.) and other bottom fish such as lingcod (Ophiodon elongatus). Please refer to Greene and others (2007) for more information regarding the Benthic Marine Potential Habitat Classification Scheme and the codes used to represent various seafloor features. A map that shows these data is published in Open-File Report 2015-1088, "California State Waters Map Series--Offshore of Tomales Point, California." This layer is part of USGS Data Series 781.
- Purpose
- In 2007, the California Ocean Protection Council initiated the California Seafloor Mapping Program (CSMP) to create a comprehensive seafloor map of high-resolution bathymetry, marine benthic habitats and geology within the 3-nautical-mile limit of California's State Waters. CSMP has divided coastal California into 110 map blocks, each to be published individually as United States Geological Survey Open-File Reports (OFRs) or Scientific Investigations Maps (SIMs) at a scale of 1:24,000. Maps display seafloor morphology and character, identify potential marine benthic habitats and illustrate both the seafloor geology and shallow (to about 100 m) subsurface geology. Data layers for bathymetry, bathymetric contours, acoustic backscatter, seafloor character, potential benthic habitat and offshore geology were created for each map block, as well as regional-scale data layers for sediment thickness, depth to transition, transgressive contours, isopachs, predicted distributions of benthic macro-invertebrates and visual observations of benthic habitat from video cruises over the entire state. The purpose of this work is to construct nine potential marine benthic habitat maps characterized after Greene et al. (1999, 2007). These habitat maps are constructed in the same manner as the maps completed for phase I of the California Seafloor Mapping Program (CSMP). These data are intended for science researchers, students, policy makers, and the general public. This information is not intended for navigational purposes.The data can be used with geographic information systems (GIS) software to display geologic and oceanographic information. Additionally, this coverage can provide a geologic map for the public and geoscience community to aid in assessments and mitigation of geologic hazards in the coastal region and sufficient geologic information for land-use and land-management decisions both onshore and offshore. This information is not intended for navigational purposes.
Description
| Type of resource | cartographic, software, multimedia |
|---|---|
| Form | Shapefile |
| Extent | 1.896 |
| Place | Santa Cruz, California, US |
| Publisher | Geological Survey (U.S.) |
| Date valid | 2014 |
| Publication date | 2015 |
| Language | English |
| Digital origin | born digital |
| Map data | Scale not given. ; Custom projection W 123°5ʹ33ʺ--W 122°53ʹ42ʺ/N 38°15ʹ19ʺ--N 38°5ʹ45ʺW 123°5ʹ33ʺ--W 122°53ʹ43ʺ/N 38°15ʹ19ʺ--N 38°5ʹ45ʺ, Scale not given ; EPSG::4326 |
Creators/Contributors
| Creator | Moss Landing Marine Laboratories | |
|---|---|---|
| Creator | Greene, H. G. | |
| Creator | Endris, Charles A. | |
| Creator | Dieter, Bryan E. | |
| Creator | Golden, Nadine E. |
Subjects
| Subject | Benthos |
|---|---|
| Subject | Marine habitats |
| Subject | Ocean bottom |
| Subject | Coasts |
| Subject | California |
| Subject | Marin County (Calif.) |
| Subject | Pacific Ocean |
| Subject | Tomales Bay (Calif.) |
| Subject | 2014 |
| Subject | Oceans |
| Subject | Biology and Ecology |
| Subject | Environment |
| Genre | Geospatial data |
| Genre | Cartographic dataset |
Bibliographic information
| Supplemental information | Interpretation and polygon delineation of habitats performed at scales from 1:2000 to 1:5000. References Cited: Greene, H.G., Bizzarro, J.J., O'Connell, V.M., and Brylinsky, C.K., 2007, Construction of digital potential marine benthic habitat maps using a coded classification scheme and its application, in Todd, B.J., and Greene, H.G., eds., Mapping the seafloor for habitat characterization: Geological Association of Canada Special Paper 47, p. 141-155. |
|---|---|
| WGS84 Cartographics | This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection. |
| Location | https://purl.stanford.edu/vt919yw7254 |
Access conditions
- Use and reproduction
- This item is in the public domain. There are no restrictions on use.
- Copyright
- This work is in the Public Domain, meaning that it is not subject to copyright.
Preferred citation
- Preferred citation
- Dieter, B.E., Greene, H.G., and Endris, C.A. (2014). Habitat: Offshore of Tomales Point, California, 2014. California State Waters Map Series Data Catalog: U.S. Geological Survey Data Series 781. Available at: http://purl.stanford.edu/vt919yw7254.
Collection
California State Waters Map Series Data Catalog
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