Isopachs: Bolinas to Pescadero, California, 2010
Abstract/Contents
- Abstract
- This line shapefile contains isopachs (contour lines of equal thickness) at 2.5 and 10 meter intervals for the area within the 3-nautical mile limit between Bolinas and Pescadero, in California. As part of the USGS's California State Waters Mapping Project, a 50-m grid of depth to the transgressive surface of the last glacial maximum (LGM) was generated for the 3-mile offshore region. The resulting grid covers an area of approximately 550 sq km. The depth to the transgressive surface of the LGM ranges between 4 and 78 meters. 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. 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.
Description
| Type of resource | cartographic, software, multimedia |
|---|---|
| Form | Shapefile |
| Extent | 1.097 |
| Publisher | Geological Survey (U.S.) |
| Date valid | 2007 - 2010 |
| Publication date | 2014 |
| Language | English |
| Digital origin | born digital |
| Map data | Scale not given. ; Custom projection W 122°47ʹ11ʺ--W 122°24ʹ11ʺ/N 37°56ʹ44ʺ--N 37°13ʹ48ʺW 122°47ʹ4ʺ--W 122°24ʹ28ʺ/N 37°56ʹ44ʺ--N 37°13ʹ48ʺ, Scale not given ; EPSG::4326 |
Creators/Contributors
| Creator | Johnson, Samuel Y. |
|---|---|
| Creator | Hartwell, Stephen R. |
| Creator | Cochrane, Guy R. |
Subjects
| Subject | Contours (Cartography) |
|---|---|
| Subject | Ocean bottom |
| Subject | California |
| Subject | San Mateo County (Calif.) |
| Subject | Marin County (Calif.) |
| Subject | Pacific Ocean |
| Subject | 2007-2010 |
| Subject | Geoscientific Information |
| Subject | Oceans |
| Subject | Elevation |
| Genre | Geospatial data |
| Genre | Cartographic dataset |
Bibliographic information
| 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/xf666sq1729 |
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
- Johnson, S.Y., Hartwell, S.R., Sliter, R.W., Watt, J.T., Phillips, E.L., Ross, S.L., Ross, S. L., and Chin, J.L.(2014). Isopachs: Bolinas to Pescadero, California, 2010. California State Waters Map Series Data Catalog: U.S. Geological Survey Data Series 781. Available at: http://purl.stanford.edu/xf666sq1729
Collection
California State Waters Map Series Data Catalog
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