gov.noaa.nmfs.inport:56960 eng UTF8 dataset Office for Coastal Management resourceProvider 2026-03-04T19:17:17 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) Seagrasses 2022-06-27 publication NOAA/NMFS/EDM 56960 https://www.fisheries.noaa.gov/inport/item/56960 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information These data show aquatic vascular vegetation beds dominated by submerged, rooted, vascular species or submerged or rooted floating freshwater tidal vascular vegetation. This is not a complete collection of seagrasses on the seafloor, nor are the locations to be considered exact. The presence and location of the seagrasses have been derived from multiple state and federal sources. To support ocean planning activities pursuant to the Executive Order Regarding the Ocean Policy to Advance the Economic, Security, and Environmental Interests of the United States, the Energy Policy Act, the National Environmental Policy Act, the Rivers and Harbors Act, and the Coastal Zone Management Act. NOAA Office for Coastal Management, Bureau of Ocean Energy Management completed Office for Coastal Management 2234 South Hobson Avenue Charleston SC 29405-2413 https://www.coast.noaa.gov/ WWW:LINK-1.0-http--link Office for Coastal Management Website Website listed for Office for Coastal Management information pointOfContact asNeeded EARTH SCIENCE > HUMAN DIMENSIONS > ENVIRONMENTAL GOVERNANCE/MANAGEMENT theme Global Change Master Directory (GCMD) Science Keywords 17.0 CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN > GULF OF AMERICA place Global Change Master Directory (GCMD) Location Keywords 20.8 aquatic vegetation benthic brackish eelgrass freshwater herbaceous macroalgae oceans oyster bed seagrass surfgrass tidal turf algal bed vascular theme Alabama Alaska CNMI California Commonwealth of the Northern Connecticut East Coast Florida Guam Gulf of Mexico Louisiana Maine Maryland Massachusetts Mississippi New Hampshire New Jersey New York North Carolina Oregon Rhode Island Territorial Sea Texas United States of America Virginia Washington place DOC/NOAA/NOS/OCM > Office of Coastal Management, National Ocean Service, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2017-04-24 publication 8.5 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian MarineCadastre project InPort otherRestrictions Cite As: Office for Coastal Management, [Date of Access]: Seagrasses [Data Date Range], https://www.fisheries.noaa.gov/inport/item/56960. 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. otherRestrictions Use Constraints: For coastal and ocean planning otherRestrictions Distribution Liability: https://www.marinecadastre.gov/about/disclaimer.html unclassified NOAA Data Management Plan (DMP) NOAA/NMFS/EDM 56960 https://www.fisheries.noaa.gov/inportserve/waf/noaa/nos/ocm/dmp/pdf/56960.pdf WWW:LINK-1.0-http--link NOAA Data Management Plan (DMP) NOAA Data Management Plan for this record on InPort. information crossReference eng; US biota environment oceans -166.28616 145.78099 13.237632 60.386899 publication date | Currentness: Publication Date 2022 Bureau Code: 006:48, Program Code: 006:055 false eng false GIS File Seagrasses in the United States 2019-07-17 publication https://marinecadastre.gov/data/ WWW:LINK-1.0-http--link https://marinecadastre.gov/data/ Marine Cadastre Data Registry download https://marinecadastre.gov/downloads/data/mc/Seagrass.zip WWW:LINK-1.0-http--link https://marinecadastre.gov/downloads/data/mc/Seagrass.zip download dataset Accuracy Untested Horizontal Positional Accuracy Compiled to meet 10 meters horizontal accuracy at 95% confidence level Completeness Report Untested Conceptual Consistency These data are logically consistent 1) Acquire original source data 2) IMPORT each shapefile into a File Geodatabase 3) PROJECT into NAD83 4) DISSOLVE each state feature class based on all fields except Object ID, Acres, Shape Length, and Shape Area to remove data overlap 5) EXPLODE all multipart features in each state feature class 6) APPEND all state feature classes into a single feature class 7) Check for overlapping features and MERGE into a single feature 8) RENAME field names to match the the proposed data dictionary 9) DELETE all superfluous fields 10) Execute the CHECK GEOMETRY function 2013-10-01T00:00:00 1) Acquire data from sources by URL download or email. Determine if the new source data supersedes existing national data set. DELETE the older, superseded features and replace with the newer source data 2) MERGE new data sets and features into the former national data set, carrying over values from the necessary source fields that match the current data's schema 3) For ShoreZone polyline features within the Washington state DNR data, features were buffered five feet in order to generate the polygon format required of this data set. In this case, coverage was denoted as 'Present', since the polygon does not represent the footprint of the seagrass here, just that it was present somewhere along this shoreline segment 4) Convert the multipart layer to singlepart and then project into an equal area projection (example: USA Contiguous Albers Equal Area Conic). Add a new field called Acreage and calculate the geometry of the features. (Special note for the Washington state DNR data: per request of the source, the acreage values for the ShoreZone features were set to Null, and the acreage values for the SVMP features were derived from the source and not calculated separately.) Project the data back into NAD83 5) Remove all unnecessary fields and populate others according to data dictionary 6) Visually inspect older features for overlap with newer data. For example, if data from the 1970s within a small estuary is immediately adjacent to and overlapping data from 2016, remove the data from the 1970s 7) Execute the REPAIR GEOMETRY function PLEASE NOTE: Per request of the Washington state DNR, the acreage values for the ShoreZone features were set to Null, and the acreage values for the SVMP features were derived from the source and not calculated separately 2019-01-01T00:00:00 1) Acquire source data PLEASE NOTE: For Washington state, a large percentage of the state's coastline was designated as having seagrass based on a crosswalk between survey units (polygons) and shoreline seagrass status (polylines). Where polylines that were attributed as "seagrass present", polygons that intersected these line segments were extracted. While the resulting polygons (i.e. survey units) express that seagrass is found therein, it does not represent the footprint of the seagrass extent. Conversely, in some cases seagrass footprints were provided, such as in: Willapa Bay, Padilla Bay, and areas of Snohomish County. [Survey units originated from the Submerged Vegetation Monitoring Project (for Puget Sound and Strait of Juan de Fuca) and the Washington Marine Vegetation Atlas (for the Pacific coast). Shoreline status was provided by Washington state's ShoreZone inventory.] 2) Polygon to polyline crosswalk (noted above) performed in Washington state 3) Shoreline data (denoting seagrass presence) from California DFW was buffered by 20 meters to create polygons (i.e. generalized footprints) 4) PROJECT each data set in NAD83 GRS 80 5) ADD fields (date, provider, location) to each data set then populated 6) ERASE data sets that overlap, and retain the newer data or data determined to be preferential to another 7) MERGE all data sets 8) Removed unnecessary fields and populated others according to data dictionary 9) SPLIT merged data by UTM (zone 10 and 11), explode features, and CALCULATE area of polygons in acres 10) MERGE data from both zones then execute the CHECK GEOMETRY function 2015-03-01T00:00:00 1) Execute the REPAIR GEOMETRY function to remove null features and fix non-simple features 2) Modify field names for usability, and to avoid common controlled vocabulary 2022-06-26T00:00:00 Source Contribution: Provided data for Florida, Hawaii, Puerto Rico, US Virgin Islands, Guam, and CNMI (all shallow coral ecosystems areas, nationally) BenthicCover MarineCadastre.gov ftp://ftp.coast.noaa.gov/pub/MSP/BenthicCover.zip WWW:LINK-1.0-http--link Source Online Linkage URL where the source data were originally accessed. information 2017-01-01 Source Contribution: Provided data for Alaska and Oregon BlueCarbon_2017_SHP Commission for Environmental Cooperation (CEC) http://www.cec.org/sites/default/files/Atlas/Files/blue_carbon/BlueCarbon_2017_SHP.zip WWW:LINK-1.0-http--link Source Online Linkage URL where the source data were originally accessed. information Source Contribution: Provided data for Massachusetts (data provided via email) CACO_Seagrass_CCS_surveys National Park Service https://www.nps.gov/index.htm WWW:LINK-1.0-http--link Source Online Linkage URL where the source data were originally accessed. information Source Contribution: Provided data for Mississippi (data provided via email) Chand_2005 NOAA Office for Coastal Management (NOAA/OCM) https://coast.noaa.gov/ WWW:LINK-1.0-http--link Source Online Linkage URL where the source data were originally accessed. information publisher 2005-10-01 Source Contribution: Provided data for Florida (data provided via email) Christiaen_et_al_2016 Dauphin Island Sea Lab https://www.disl.org/ WWW:LINK-1.0-http--link Source Online Linkage URL where the source data were originally accessed. information 2016-01-01 Source Contribution: Provided data for New York (data provided via email) FIIS_Seagrass New York Governor's Office of Storm Recovery (GOSR) https://stormrecovery.ny.gov/ WWW:LINK-1.0-http--link Source Online Linkage URL where the source data were originally accessed. information 2018-01-01 Source Contribution: Provided data for New York (data provided via email) LISS2018d University of Rhode Island https://www.uri.edu/ WWW:LINK-1.0-http--link Source Online Linkage URL where the source data were originally accessed. information 2018-01-01 Source Contribution: Provided data for California (data provided via email) NoCA_estuaries California Department of Fish and Wildlife https://www.wildlife.ca.gov/ WWW:LINK-1.0-http--link Source Online Linkage URL where the source data were originally accessed. information Source Contribution: Provided data for California, Oregon, and Washington PMEP_West_Coast_Eelgrass_V1 Pacific Marine and Estuarine Fish Habitat Partnership (PMEP) http://www.pacificfishhabitat.org/data/west-coast-usa-eelgrass-habitat/ WWW:LINK-1.0-http--link Source Online Linkage URL where the source data were originally accessed. information Source Contribution: Provided data for Alabama (data provided via email) SAV2015 Dauphin Island Sea Lab https://www.disl.org/ WWW:LINK-1.0-http--link Source Online Linkage URL where the source data were originally accessed. information 2015-01-01 Source Contribution: Provided SVMP and ShoreZone data for Washington (data provided via email) SVMPdata_2000-2017 Washington State Department of Natural Resources https://www.dnr.wa.gov/ WWW:LINK-1.0-http--link Source Online Linkage URL where the source data were originally accessed. information Source Contribution: Provided source data originally received directly from sources via email or downloaded online, for previously developed national data set. Seagrasses California National Marine Fisheries Service https://marinecadastre.gov/data/ WWW:LINK-1.0-http--link Source Online Linkage URL where the source data were originally accessed. information Source Contribution: Provided data for Rhode Island Submerged_Aquatic_Vegetation_2016 Rhode Island Geographic Information System http://www.rigis.org/datasets/submerged-aquatic-vegetation-sav-in-ri-coastal-waters-2016 WWW:LINK-1.0-http--link Source Online Linkage URL where the source data were originally accessed. information Source Contribution: Provided data for Massachusetts eelgrass2015_2017 Massachusetts Department of Environmental Protection http://download.massgis.digital.mass.gov/shapefiles/state/eelgrass2015_2017.zip WWW:LINK-1.0-http--link Source Online Linkage URL where the source data were originally accessed. information Source Contribution: Provided data for Virginia sav2016 Virginia Institute of Marine Science http://web.vims.edu/bio/sav/gis_data.html WWW:LINK-1.0-http--link Source Online Linkage URL where the source data were originally accessed. information 2016-01-01 Source Contribution: Provided data for Florida seagrass_fl_poly Florida Fish and Wildlife Conservation Commission https://myfwc.com/research/habitat/seagrasses/ WWW:LINK-1.0-http--link Source Online Linkage URL where the source data were originally accessed. information Source Contribution: Provided data for Florida sg_16_springscoast Southwest Florida Water Management District ftp://ftp.swfwmd.state.fl.us/pub/gisdata/swim/sg16_springscoast.zip WWW:LINK-1.0-http--link Source Online Linkage URL where the source data were originally accessed. information 2016-01-01 Source Contribution: Provided data for Texas tpwd-seagrass Texas Parks and Wildlife Department https://tpwd.texas.gov/gis/resources/tpwd-seagrass.zip WWW:LINK-1.0-http--link Source Online Linkage URL where the source data were originally accessed. information 2012-01-01