File Geodatabase Feature Class
Tags
estuaries, estuary, estuary extent, tidal wetlands, West Coast, Pacific Marine and Estuarine Fish Habitat Partnership, PMEP
Data clipped to the state of California with a 5 mile buffer by CDFW staff *************************************************************************************** This layer represents the current and historical tidal wetlands, or estuary extent, for the West Coast of the contiguous United States.
Accurate mapping of tidal wetlands is vital for effective conservation and restoration of these valued habitats, and good mapping is key to strategic planning for coastal resilience. Tidal wetlands are defined by regular inundation by the tides; therefore, mapping of tidal wetlands should be based on knowledge of tidal water levels and the land areas inundated by the tides. We developed this tidal wetland mapping following that principle.
Briefly, we used a method developed in Oregon that combines NOAAs extreme water level models ( https://tidesandcurrents.noaa.gov/est/ ) with high-resolution LIDAR digital elevation models (DEMs) to map areas subject to tidal inundation. We refined the mapping using additional data sources such as the National Wetland Inventory, local knowledge, and aerial photo interpretation. Detailed information on the Oregon methods can be found here: http://www.coastalatlas.net/documents/cmecs/EPSM_CoreGISMethods.pdf
Our mapping includes areas currently inundated by the tides, current tidal wetlands, from ocean to head of tide, including the freshwater tidal zone. To assist restoration planning, our mapping also includes historical tidal wetlands, areas that were historically inundated by the tides, but are no longer inundated by the tides due to human alterations to the landscape such as dikes and tide gates. Although the mapping does not yet distinguish current from historical (disconnected) tidal wetlands, a future mapping phase (currently in the data development phase) will provide that information.
Note: This subset of data represents the approximate extent of current and historical tidal wetlands for PMEPs 444 estuaries, excluding unassociated extents and mouth connection areas.
Pacific Marine and Estuarine Fish Habitat Partnership, PSMFC GIS, Oregon Coastal Management Program (Department of Land Conservation and Development), NOAA-NWFSC, PC Trask
Disclaimer : The State makes no claims, promises, or guarantees about the accuracy, completeness, reliability, or adequacy of these data and expressly disclaims liability for errors and omissions in these data. No warranty of any kind, implied, expressed, or statutory, including but not limited to the warranties of non-infringement of third party rights, title, merchantability, fitness for a particular purpose, and freedom from computer virus, is given with respect to these data.
This product is for informational purposes only and is not intended for navigational, legal, engineering, or surveying purposes; it is provided with the understanding that conclusions drawn from the information are the responsibility of the user.
Extent
West | -124.8 | East | -117 |
North | 49.0 | South | 32.5 |
Maximum (zoomed in) | 1:5,000 |
Minimum (zoomed out) | 1:20,000,000 |
Disclaimer : The State makes no claims, promises, or guarantees about the accuracy, completeness, reliability, or adequacy of these data and expressly disclaims liability for errors and omissions in these data. No warranty of any kind, implied, expressed, or statutory, including but not limited to the warranties of non-infringement of third party rights, title, merchantability, fitness for a particular purpose, and freedom from computer virus, is given with respect to these data.
This product is for informational purposes only and is not intended for navigational, legal, engineering, or surveying purposes; it is provided with the understanding that conclusions drawn from the information are the responsibility of the user.
This product is for informational purposes only and is not intended for navigational, legal, engineering, or surveying purposes; it is provided with the understanding that conclusions drawn from the information are the responsibility of the user.