Seagrasses
Office for Coastal Management
Data Set
(DS)
| ID: 56960
| Published / External
Created: 2019-07-17
|
Last Modified: 2023-05-30
Project (PRJ) | ID: 37232
ID: 56960
Data Set (DS)
* Discovery• First Pass
» Metadata Rubric
Item Identification
| * » Title | Seagrasses |
|---|---|
| Short Name | |
| * Status | Completed |
| Creation Date | |
| Revision Date | |
| • Publication Date | 2022-06-27 |
| * » Abstract |
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. |
| * Purpose |
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. |
| Notes | |
| Other Citation Details | |
| • Supplemental Information |
Bureau Code: 006:48, Program Code: 006:055 |
| DOI (Digital Object Identifier) | |
| DOI Registration Authority | |
| DOI Issue Date |
Keywords
Theme Keywords
| Thesaurus | Keyword |
|---|---|
| Global Change Master Directory (GCMD) Science Keywords | EARTH SCIENCE > HUMAN DIMENSIONS > ENVIRONMENTAL GOVERNANCE/MANAGEMENT |
| ISO 19115 Topic Category | biota |
| ISO 19115 Topic Category | environment |
| ISO 19115 Topic Category | oceans |
| None | aquatic vegetation |
| None | benthic |
| None | brackish |
| None | eelgrass |
| None | freshwater |
| None | herbaceous |
| None | macroalgae |
| None | oceans |
| None | oyster bed |
| None | seagrass |
| None | surfgrass |
| None | tidal |
| None | turf algal bed |
| None | vascular |
Temporal Keywords
| Thesaurus | Keyword |
|---|---|
* Spatial Keywords
| Thesaurus | Keyword |
|---|---|
| Global Change Master Directory (GCMD) Location Keywords | CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA |
| None | Alabama |
| None | Alaska |
| None | California |
| None | CNMI |
| None | Commonwealth of the Northern |
| None | Connecticut |
| None | East Coast |
| None | Florida |
| None | Guam |
| None | Gulf of Mexico |
| None | Louisiana |
| None | Maine |
| None | Maryland |
| None | Massachusetts |
| None | Mississippi |
| None | New Hampshire |
| None | New Jersey |
| None | New York |
| None | North Carolina |
| None | Oregon |
| None | Rhode Island |
| None | Territorial Sea |
| None | Texas |
| None | United States of America |
| None | Virginia |
| None | Washington |
Stratum Keywords
| Thesaurus | Keyword |
|---|---|
Instrument Keywords
| Thesaurus | Keyword |
|---|---|
Platform Keywords
| Thesaurus | Keyword |
|---|---|
Physical Location
| • » Organization | |
|---|---|
| • » City | Charleston |
| • » State/Province | SC |
| • Country | |
| • » Location Description |
Data Set Information
| * Data Set Scope Code | Data Set |
|---|---|
| • Data Set Type | |
| • Maintenance Frequency | As Needed |
| Maintenance Note | |
| » Data Presentation Form | |
| • Entity Attribute Overview |
stateUSPS, aquaticSetting, bioticClass, bioticSubclass, bioticGroup, bioticCommunity, CMECS, cover, species1, species2, species3, species4, species5, species6, species7, sourceRecord, sourceDate, acres |
| Entity Attribute Detail Citation | |
| Entity Attribute Detail URL | |
| Distribution Liability |
https://www.marinecadastre.gov/about/disclaimer.html |
| Data Set Credit | NOAA Office for Coastal Management, Bureau of Ocean Energy Management |
Support Roles
| * » Support Role | Point of Contact |
|---|---|
| * » Date Effective From | 2021 |
| Date Effective To | |
| Organization | Office for Coastal Management (OCM) |
| Address |
2234 South Hobson Avenue Charleston, SC 29405-2413 |
| Email Address | |
| Phone | |
| Fax | |
| Mobile | |
| URL | https://www.coast.noaa.gov/ |
| Business Hours | |
| Contact Instructions |
| * » Support Role | |
|---|---|
| * » Date Effective From | |
| Date Effective To | |
| * » Contact | |
| * Contact Instructions |
| * » Support Role | |
|---|---|
| * » Date Effective From | |
| Date Effective To | |
| * » Contact | |
| * Contact Instructions |
| * » Support Role | |
|---|---|
| * » Date Effective From | |
| Date Effective To | |
| * » Contact | |
| * Contact Instructions |
Extents
| Currentness Reference | Publication Date |
|---|
Extent Group 1
| Extent Description |
|---|
Extent Group 1 / Geographic Area 1
| * » W° Bound | -166.28616 |
|---|---|
| * » E° Bound | 145.78099 |
| * » N° Bound | 60.386899 |
| * » S° Bound | 13.237632 |
| * » Description |
Extent Group 1 / Vertical Extent
| EPSG Code | |
|---|---|
| Vertical Minimum | |
| Vertical Maximum |
Extent Group 1 / Time Frame 1
| * » Time Frame Type | Discrete |
|---|---|
| * » Start | 2022 |
| End | |
| Alternate Start As Of Info | |
| Alternate End As Of Info | |
| Description |
publication date |
Spatial Information
Spatial Resolution
| Angular Distance | |
|---|---|
| Angular Distance Units | |
| Horizontal Distance | |
| Horizontal Distance Units | |
| Vertical Distance | |
| Vertical Distance Units | |
| Equivalent Scale Denominator | |
| Level of Detail Description |
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Spatial Representation
| Grid Representation Used? | |
|---|---|
| Vector Representation Used? | |
| Text / Table Representation Used? | |
| TIN Representation Used? | |
| Stereo Model Representation Used? | |
| Video Representation Used? |
Grid Representation
| Dimension Count | |||||||||||||
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| Cell Geometry | |||||||||||||
| Transformation Parameter Available? | |||||||||||||
Axis Dimension |
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Axis Dimension |
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Vector Representation
| Topology Level | |
|---|---|
| Complex Object Present? | |
| Complex Object Count | |
| Composite Object Present? | |
| Composite Object Count | |
| Curve Object Present? | |
| Curve Object Count | |
| Point Object Present? | |
| Point Object Count | |
| Solid Object Present? | |
| Solid Object Count | |
| Surface Object Present? | |
| Surface Object Count |
Reference Systems
Reference System
| EPSG Code | |||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Horizontal Resolution |
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Vertical Resolution |
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Access Information
| * » Security Class | Unclassified |
|---|---|
| * Security Classification System | |
| Security Handling Description | |
| • Data Access Policy | |
| » Data Access Procedure | |
| • » Data Access Constraints | |
| • Data Use Constraints |
For coastal and ocean planning |
| Metadata Access Constraints | |
| Metadata Use Constraints |
Distribution Information
| Start Date | |
|---|---|
| » Download URL | https://marinecadastre.gov/data/ |
| Distributor | |
| File Name | |
| Description |
MarineCadastre.gov Data Registry |
| File Date/Time | |
| File Type (Deprecated) | |
| Distribution Format | |
| File Size | |
| Application Version | |
| Compression | |
| Review Status |
| Start Date | |
|---|---|
| » Download URL | https://marinecadastre.gov/downloads/data/mc/Seagrass.zip |
| Distributor | |
| File Name | |
| Description | |
| File Date/Time | |
| File Type (Deprecated) | |
| Distribution Format | |
| File Size | |
| Application Version | |
| Compression | |
| Review Status |
| Start Date | |
|---|---|
| End Date | |
| » Download URL | |
| Distributor | |
| File Name | |
| Description | |
| File Date/Time | |
| File Type | |
| FGDC Content Type | |
| File Size | |
| Application Version | |
| Compression | |
| Review Status |
| Start Date | |
|---|---|
| End Date | |
| » Download URL | |
| Distributor | |
| File Name | |
| Description | |
| File Date/Time | |
| File Type | |
| FGDC Content Type | |
| File Size | |
| Application Version | |
| Compression | |
| Review Status |
| Start Date | |
|---|---|
| End Date | |
| » Download URL | |
| Distributor | |
| File Name | |
| Description | |
| File Date/Time | |
| File Type | |
| FGDC Content Type | |
| File Size | |
| Application Version | |
| Compression | |
| Review Status |
URLs
| URL | |
|---|---|
| Name | |
| URL Type | |
| File Resource Format | |
| Description |
| URL | |
|---|---|
| Name | |
| URL Type | |
| File Resource Format | |
| Description |
| URL | |
|---|---|
| Name | |
| URL Type | |
| File Resource Format | |
| Description |
Activity Log
| Activity Time | |
|---|---|
| Activity Type | |
| Responsible Party | |
| Description |
| Activity Time | |
|---|---|
| Activity Type | |
| Responsible Party | |
| Description |
| Activity Time | |
|---|---|
| Activity Type | |
| Responsible Party | |
| Description |
Issues
| Issue Date | |
|---|---|
| Author | |
| Issue |
| Issue Date | |
|---|---|
| Author | |
| Issue |
| Issue Date | |
|---|---|
| Author | |
| Issue |
Technical Environment
| Description |
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|---|
Data Quality
| Representativeness | |
|---|---|
| Accuracy |
Untested |
| Analytical Accuracy | |
| Horizontal Positional Accuracy |
Compiled to meet 10 meters horizontal accuracy at 95% confidence level |
| Vertical Positional Accuracy | |
| Quantitation Limits | |
| Bias | |
| Comparability | |
| Completeness Measure | |
| Precision | |
| Analytical Precision | |
| Field Precision | |
| Sensitivity | |
| Detection Limit | |
| Completeness Report |
Untested |
| Conceptual Consistency |
These data are logically consistent |
| » Quality Control Procedures Employed |
Data Management
| » Have Resources for Management of these Data Been Identified? | |
|---|---|
| » Approximate Percentage of Budget for these Data Devoted to Data Management | |
| » Do these Data Comply with the Data Access Directive? | |
| » Is Access to the Data Limited Based on an Approved Waiver? | |
| » If Distributor (Data Hosting Service) is Needed, Please Indicate | |
| » Approximate Delay Between Data Collection and Dissemination | |
| » If Delay is Longer than Latency of Automated Processing, Indicate Under What Authority Data Access is Delayed |
|
| » Actual or Planned Long-Term Data Archive Location | |
| » If World Data Center or Other, Specify | |
| » If To Be Determined, Unable to Archive, or No Archiving Intended, Explain |
|
| » Approximate Delay Between Data Collection and Archiving | |
| » How Will the Data Be Protected from Accidental or Malicious Modification or Deletion Prior to Receipt by the Archive? |
|
Lineage
| » Lineage Statement |
|---|
Sources
| Citation Title | BenthicCover |
|---|---|
| Contact Role Type | |
| Contact Type | |
| Contact Name | MarineCadastre.gov |
| Publish Date | |
| Extent Type | Discrete |
| Extent Start Date/Time | 2017-01-01 |
| Extent End Date/Time | |
| Scale Denominator | |
| Citation URL | ftp://ftp.coast.noaa.gov/pub/MSP/BenthicCover.zip |
| Citation URL Name | Source Online Linkage |
| Citation URL Description |
URL where the source data were originally accessed. |
| Source Contribution |
Provided data for Florida, Hawaii, Puerto Rico, US Virgin Islands, Guam, and CNMI (all shallow coral ecosystems areas, nationally) |
| Citation Title | BlueCarbon_2017_SHP |
|---|---|
| Contact Role Type | |
| Contact Type | |
| Contact Name | Commission for Environmental Cooperation (CEC) |
| Publish Date | |
| Extent Type | |
| Extent Start Date/Time | |
| Extent End Date/Time | |
| Scale Denominator | |
| Citation URL | http://www.cec.org/sites/default/files/Atlas/Files/blue_carbon/BlueCarbon_2017_SHP.zip |
| Citation URL Name | Source Online Linkage |
| Citation URL Description |
URL where the source data were originally accessed. |
| Source Contribution |
Provided data for Alaska and Oregon |
| Citation Title | CACO_Seagrass_CCS_surveys |
|---|---|
| Contact Role Type | |
| Contact Type | |
| Contact Name | National Park Service |
| Publish Date | |
| Extent Type | |
| Extent Start Date/Time | |
| Extent End Date/Time | |
| Scale Denominator | |
| Citation URL | https://www.nps.gov/index.htm |
| Citation URL Name | Source Online Linkage |
| Citation URL Description |
URL where the source data were originally accessed. |
| Source Contribution |
Provided data for Massachusetts (data provided via email) |
| Citation Title | Chand_2005 |
|---|---|
| Contact Role Type | Publisher |
| Contact Type | Organization |
| Contact Name | NOAA Office for Coastal Management (NOAA/OCM) |
| Publish Date | |
| Extent Type | Discrete |
| Extent Start Date/Time | 2005-10-01 |
| Extent End Date/Time | |
| Scale Denominator | |
| Citation URL | https://coast.noaa.gov/ |
| Citation URL Name | Source Online Linkage |
| Citation URL Description |
URL where the source data were originally accessed. |
| Source Contribution |
Provided data for Mississippi (data provided via email) |
| Citation Title | Christiaen_et_al_2016 |
|---|---|
| Contact Role Type | |
| Contact Type | |
| Contact Name | Dauphin Island Sea Lab |
| Publish Date | |
| Extent Type | Discrete |
| Extent Start Date/Time | 2016-01-01 |
| Extent End Date/Time | |
| Scale Denominator | |
| Citation URL | https://www.disl.org/ |
| Citation URL Name | Source Online Linkage |
| Citation URL Description |
URL where the source data were originally accessed. |
| Source Contribution |
Provided data for Florida (data provided via email) |
| Citation Title | eelgrass2015_2017 |
|---|---|
| Contact Role Type | |
| Contact Type | |
| Contact Name | Massachusetts Department of Environmental Protection |
| Publish Date | |
| Extent Type | |
| Extent Start Date/Time | |
| Extent End Date/Time | |
| Scale Denominator | |
| Citation URL | http://download.massgis.digital.mass.gov/shapefiles/state/eelgrass2015_2017.zip |
| Citation URL Name | Source Online Linkage |
| Citation URL Description |
URL where the source data were originally accessed. |
| Source Contribution |
Provided data for Massachusetts |
| Citation Title | FIIS_Seagrass |
|---|---|
| Contact Role Type | |
| Contact Type | |
| Contact Name | New York Governor's Office of Storm Recovery (GOSR) |
| Publish Date | |
| Extent Type | Discrete |
| Extent Start Date/Time | 2018-01-01 |
| Extent End Date/Time | |
| Scale Denominator | |
| Citation URL | https://stormrecovery.ny.gov/ |
| Citation URL Name | Source Online Linkage |
| Citation URL Description |
URL where the source data were originally accessed. |
| Source Contribution |
Provided data for New York (data provided via email) |
| Citation Title | LISS2018d |
|---|---|
| Contact Role Type | |
| Contact Type | |
| Contact Name | University of Rhode Island |
| Publish Date | |
| Extent Type | Discrete |
| Extent Start Date/Time | 2018-01-01 |
| Extent End Date/Time | |
| Scale Denominator | |
| Citation URL | https://www.uri.edu/ |
| Citation URL Name | Source Online Linkage |
| Citation URL Description |
URL where the source data were originally accessed. |
| Source Contribution |
Provided data for New York (data provided via email) |
| Citation Title | NoCA_estuaries |
|---|---|
| Contact Role Type | |
| Contact Type | |
| Contact Name | California Department of Fish and Wildlife |
| Publish Date | |
| Extent Type | |
| Extent Start Date/Time | |
| Extent End Date/Time | |
| Scale Denominator | |
| Citation URL | https://www.wildlife.ca.gov/ |
| Citation URL Name | Source Online Linkage |
| Citation URL Description |
URL where the source data were originally accessed. |
| Source Contribution |
Provided data for California (data provided via email) |
| Citation Title | PMEP_West_Coast_Eelgrass_V1 |
|---|---|
| Contact Role Type | |
| Contact Type | |
| Contact Name | Pacific Marine and Estuarine Fish Habitat Partnership (PMEP) |
| Publish Date | |
| Extent Type | |
| Extent Start Date/Time | |
| Extent End Date/Time | |
| Scale Denominator | |
| Citation URL | http://www.pacificfishhabitat.org/data/west-coast-usa-eelgrass-habitat/ |
| Citation URL Name | Source Online Linkage |
| Citation URL Description |
URL where the source data were originally accessed. |
| Source Contribution |
Provided data for California, Oregon, and Washington |
| Citation Title | SAV2015 |
|---|---|
| Contact Role Type | |
| Contact Type | |
| Contact Name | Dauphin Island Sea Lab |
| Publish Date | |
| Extent Type | Discrete |
| Extent Start Date/Time | 2015-01-01 |
| Extent End Date/Time | |
| Scale Denominator | |
| Citation URL | https://www.disl.org/ |
| Citation URL Name | Source Online Linkage |
| Citation URL Description |
URL where the source data were originally accessed. |
| Source Contribution |
Provided data for Alabama (data provided via email) |
| Citation Title | sav2016 |
|---|---|
| Contact Role Type | |
| Contact Type | |
| Contact Name | Virginia Institute of Marine Science |
| Publish Date | |
| Extent Type | Discrete |
| Extent Start Date/Time | 2016-01-01 |
| Extent End Date/Time | |
| Scale Denominator | |
| Citation URL | http://web.vims.edu/bio/sav/gis_data.html |
| Citation URL Name | Source Online Linkage |
| Citation URL Description |
URL where the source data were originally accessed. |
| Source Contribution |
Provided data for Virginia |
| Citation Title | seagrass_fl_poly |
|---|---|
| Contact Role Type | |
| Contact Type | |
| Contact Name | Florida Fish and Wildlife Conservation Commission |
| Publish Date | |
| Extent Type | |
| Extent Start Date/Time | |
| Extent End Date/Time | |
| Scale Denominator | |
| Citation URL | https://myfwc.com/research/habitat/seagrasses/ |
| Citation URL Name | Source Online Linkage |
| Citation URL Description |
URL where the source data were originally accessed. |
| Source Contribution |
Provided data for Florida |
| Citation Title | Seagrasses |
|---|---|
| Contact Role Type | |
| Contact Type | |
| Contact Name | California National Marine Fisheries Service |
| Publish Date | |
| Extent Type | |
| Extent Start Date/Time | |
| Extent End Date/Time | |
| Scale Denominator | |
| Citation URL | https://marinecadastre.gov/data/ |
| Citation URL Name | Source Online Linkage |
| Citation URL Description |
URL where the source data were originally accessed. |
| Source Contribution |
Provided source data originally received directly from sources via email or downloaded online, for previously developed national data set. |
| Citation Title | sg_16_springscoast |
|---|---|
| Contact Role Type | |
| Contact Type | |
| Contact Name | Southwest Florida Water Management District |
| Publish Date | |
| Extent Type | Discrete |
| Extent Start Date/Time | 2016-01-01 |
| Extent End Date/Time | |
| Scale Denominator | |
| Citation URL | ftp://ftp.swfwmd.state.fl.us/pub/gisdata/swim/sg16_springscoast.zip |
| Citation URL Name | Source Online Linkage |
| Citation URL Description |
URL where the source data were originally accessed. |
| Source Contribution |
Provided data for Florida |
| Citation Title | Submerged_Aquatic_Vegetation_2016 |
|---|---|
| Contact Role Type | |
| Contact Type | |
| Contact Name | Rhode Island Geographic Information System |
| Publish Date | |
| Extent Type | |
| Extent Start Date/Time | |
| Extent End Date/Time | |
| Scale Denominator | |
| Citation URL | http://www.rigis.org/datasets/submerged-aquatic-vegetation-sav-in-ri-coastal-waters-2016 |
| Citation URL Name | Source Online Linkage |
| Citation URL Description |
URL where the source data were originally accessed. |
| Source Contribution |
Provided data for Rhode Island |
| Citation Title | SVMPdata_2000-2017 |
|---|---|
| Contact Role Type | |
| Contact Type | |
| Contact Name | Washington State Department of Natural Resources |
| Publish Date | |
| Extent Type | |
| Extent Start Date/Time | |
| Extent End Date/Time | |
| Scale Denominator | |
| Citation URL | https://www.dnr.wa.gov/ |
| Citation URL Name | Source Online Linkage |
| Citation URL Description |
URL where the source data were originally accessed. |
| Source Contribution |
Provided SVMP and ShoreZone data for Washington (data provided via email) |
| Citation Title | tpwd-seagrass |
|---|---|
| Contact Role Type | |
| Contact Type | |
| Contact Name | Texas Parks and Wildlife Department |
| Publish Date | |
| Extent Type | Discrete |
| Extent Start Date/Time | 2012-01-01 |
| Extent End Date/Time | |
| Scale Denominator | |
| Citation URL | https://tpwd.texas.gov/gis/resources/tpwd-seagrass.zip |
| Citation URL Name | Source Online Linkage |
| Citation URL Description |
URL where the source data were originally accessed. |
| Source Contribution |
Provided data for Texas |
| Citation Title | |
|---|---|
| Contact Role Type | |
| Contact Type | |
| Contact Name | |
| Publish Date | |
| Extent Type | |
| Extent Start Date/Time | |
| Extent End Date/Time | |
| Citation URL | |
| Citation URL Name | |
| Citation URL Description | |
| Scale Denominator |
| Citation Title | |
|---|---|
| Contact Role Type | |
| Contact Type | |
| Contact Name | |
| Publish Date | |
| Extent Type | |
| Extent Start Date/Time | |
| Extent End Date/Time | |
| Citation URL | |
| Citation URL Name | |
| Citation URL Description | |
| Scale Denominator |
| Citation Title | |
|---|---|
| Contact Role Type | |
| Contact Type | |
| Contact Name | |
| Publish Date | |
| Extent Type | |
| Extent Start Date/Time | |
| Extent End Date/Time | |
| Citation URL | |
| Citation URL Name | |
| Citation URL Description | |
| Scale Denominator |
Process Steps
| Process Step Number | 1 |
|---|---|
| » Description |
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 |
| Process Date/Time | 2013-10-01 00:00:00 |
| Process Contact | |
| Phone (Voice) | |
| Email Address | |
| Source |
| Process Step Number | 2 |
|---|---|
| » Description |
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 |
| Process Date/Time | 2019-01-01 00:00:00 |
| Process Contact | |
| Phone (Voice) | |
| Email Address | |
| Source |
| Process Step Number | 3 |
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| » Description |
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 |
| Process Date/Time | 2015-03-01 00:00:00 |
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| Process Step Number | 4 |
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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 |
| Process Date/Time | 2022-06-26 00:00:00 |
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Acquisition Information
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Child Items
Rubric scores updated every 15m
| Score | Type | Title |
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| Entity (ENT) | Seagrasses in the United States | |
Related Items
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Catalog Details
| Catalog Item ID | 56960 |
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| Metadata Record Created By | Jesse Brass |
| Metadata Record Created | 2019-07-17 14:41+0000 |
| Metadata Record Last Modified By | SysAdmin InPortAdmin |
| » Metadata Record Last Modified | 2023-05-30 18:09+0000 |
| Metadata Record Published | 2019-07-17 |
| Owner Org | OCM |
| Metadata Publication Status | Published Externally |
| Do Not Publish? | N |
| Metadata Workflow State | Published / External |
| Metadata Last Review Date | 2019-07-17 |
| Metadata Review Frequency | 1 Year |
| Metadata Next Review Date | 2020-07-17 |
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