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Kelp distribution off California

Metadata Updated: November 15, 2023

This data set delineates kelp beds (Nereocystis leutkeana and Macrocystis spp.) along the Pacific Coast of California. Multiple years of kelp mapping data for the state have been compiled into a single coastwide data set. Due to variability in oceanographic and climatic conditions, kelp bed abundance and distribution is extremely variable from year to year. Therefore kelp bed locations and extent in a particular year may not reflect current or past conditions. In addition, the methods for mapping kelp in California have changed over time. Despite these caveats, this multi-year kelp coverage can be used to identify areas that have been known to support kelp growth, and investigate general patterns of kelp distribution on a coastwide scale.California has three coastal kelp surveys. The first survey, 1989, was a coastwide survey using the same contractor and method as Washington State. Kelp canopy data from the second survey, 1999, was created from digital image processing of scanned aerial photographs. The 2002 survey was performed with a Digital Multispectral Video (DMSV) sensor and kelp beds were delineated by digital image processing techniques.

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources


Metadata Date October 17, 2023
Metadata Created Date November 12, 2020
Metadata Updated Date November 15, 2023
Reference Date(s) 2004 (publication)
Frequency Of Update unknown

Metadata Source

Harvested from NOS NCCOS

Additional Metadata

Resource Type Dataset
Metadata Date October 17, 2023
Metadata Created Date November 12, 2020
Metadata Updated Date November 15, 2023
Reference Date(s) 2004 (publication)
Responsible Party (Point of Contact, Custodian)
Contact Email
Guid gov.noaa.nmfs.inport:39359
Access Constraints Cite As: National Centers for Coastal Ocean Science, [Date of Access]: Kelp distribution off California [Data Date Range],, Access Constraints: None | Use Constraints: None | Distribution Liability: Unknown
Bbox East Long -116.826846
Bbox North Lat 40.475111
Bbox South Lat 32.520358
Bbox West Long -124.397359
Coupled Resource
Frequency Of Update unknown
Harvest Object Id 3ae22e4d-09d9-4526-b38c-dc06e0154f90
Harvest Source Id 9594655d-43d5-48eb-bc7d-86f579a54e78
Harvest Source Title NOS NCCOS
Licence NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose.
Metadata Language eng
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": [[[-124.397359, 32.520358], [-116.826846, 32.520358], [-116.826846, 40.475111], [-124.397359, 40.475111], [-124.397359, 32.520358]]]}
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 1989
Temporal Extent End 2002

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