Mapping Data of Eelgrass (Zostera marina) Distribution, Togiak National Wildlife Refuge, Alaska

Identification_Information:

Citation:

Citation_Information:

Originator: Ward, David H. (ORCID: 0000-0002-5242-2526)
Originator: Hogrefe, Kyle R.
Publication_Date: 20220627
Title:

Geospatial_Data_Presentation_Form: vector digital data, raster digital data, tabular digital data
Series_Information:

Series_Name:

Mapping Data of Eelgrass (Zostera marina) Distribution, Alaska and Baja California, Mexico

Issue_Identification: .

Publication_Information:

Publication_Place: Anchorage, Alaska
Publisher: U.S. Geological Survey, Alaska Science Center

Other_Citation_Details:

Suggested Citation: Ward, D.H., Hogrefe, K.R. 2022. Mapping data of eelgrass (Zostera marina) distribution, Alaska and Baja California, Mexico: U.S. Geological Survey data release, https://doi.org/10.5066/P9WEK4JI

Online_Linkage: https://doi.org/10.5066/P9WEK4JI
Larger_Work_Citation:

Citation_Information:

Originator: U.S. Geological Survey, Alaska Science Center
Publication_Date: 2009
Title: Population Ecology of Waterfowl and Loons
Geospatial_Data_Presentation_Form: website
Series_Information:

Series_Name: Alaska Science Portal
Issue_Identification: 377

Publication_Information:

Publication_Place: Anchorage, Alaska
Publisher: U.S. Geological Survey, Alaska Science Center

Other_Citation_Details:

This is a link to the broader USGS Alaska Science Center research project supported by these data. Users will find a description of the research project and links to associated reports, publications, and data products.

Online_Linkage: https://alaska.usgs.gov/portal/project.php?project_id=377

Description:

Abstract:

Provided here are two vector geospatial datasets that characterize the distribution of eelgrass (Zostera marina) and seaweeds in waters adjacent to Togiak National Wildlife Refuge, Alaska. These data were derived from: (1) aerial photo imagery acquired on five different summer days 2005-2013 and (2) satellite imagery (Ikonos-2 and Quickbird-2) acquired on five different summer days 2002-2004. Additionally, the ortho-rectified photomosaics of the aerial photographs used for analysis are provided.

Purpose:

Coastal waters adjacent to the Togiak National Wildlife Refuge contain extensive beds of eelgrass, but the status and trends of distribution are unknown. This dataset provides baseline information on the spatial extent and distribution of eelgrass and seaweed in waters adjacent to the Togiak National Wildlife Refuge enabling a monitoring program for these coastal habitats that support many species including waterfowl.

Supplemental_Information:

The creation of this dataset was a collaborative effort between the U.S. Geological Survey and the U.S Fish and Wildlife Service.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 2002
Ending_Date: 2012

Currentness_Reference: observed

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Description_of_Geographic_Extent: Coastal areas of Bristol Bay and the Bering Sea of Alaska
Bounding_Coordinates:

West_Bounding_Coordinate: -162.0
East_Bounding_Coordinate: -159.5
North_Bounding_Coordinate: 59.3
South_Bounding_Coordinate: 58.5

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:ASC454

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: Biota
Theme_Keyword: Environment

Theme:

Theme_Keyword_Thesaurus: NASA GCMD Earth Science Keyword Thesaurus
Theme_Keyword: Angiosperms (flowering plants)
Theme_Keyword: Monocots
Theme_Keyword: Seagrass
Theme_Keyword: Macroalgae (seaweeds)
Theme_Keyword: Animals/Invertebrates
Theme_Keyword: Marine environment monitoring

Theme:

Theme_Keyword_Thesaurus: USGS CSA Biocomplexity Thesaurus
Theme_Keyword: Marine ecosystems
Theme_Keyword: Coastal ecosystems
Theme_Keyword: Estuarine ecosystems
Theme_Keyword: Seagrass beds

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: Field inventory and monitoring
Theme_Keyword: Animal and plant census
Theme_Keyword: Remote sensing

Theme:

Theme_Keyword_Thesaurus: None
Theme_Keyword: Eelgrass
Theme_Keyword: Zostera marina

Place:

Place_Keyword_Thesaurus: USGS Geographic Names Information System (GNIS)
Place_Keyword: Alaska
Place_Keyword: Bering Sea
Place_Keyword: Bristol Bay
Place_Keyword: Kuskokwim Bay
Place_Keyword: Nanvak Bay
Place_Keyword: Chagvan Bay
Place_Keyword: Goodnews Bay

Place:

Place_Keyword_Thesaurus: None
Place_Keyword: Togiak National Wildlife Refuge

Taxonomy:

Keywords/Taxon:

Taxonomic_Keyword_Thesaurus: None
Taxonomic_Keywords: Seagrass
Taxonomic_Keywords: Eelgrass
Taxonomic_Keywords: Zostera marina

Taxonomic_System:

Classification_System/Authority:

Classification_System_Citation:

Citation_Information:

Originator: ITIS Integrated Taxonomic Information System
Publication_Date: Unknown
Title: ITIS Integrated Taxonomic Information System
Geospatial_Data_Presentation_Form: online database
Publication_Information:

Publication_Place: online
Publisher: ITIS-North America

Other_Citation_Details:

Taxonomic details retrieved May 11, 2022, from the Integrated Taxonomic Information System online database https://www.itis.gov

Online_Linkage: https://www.itis.gov

Taxonomic_Procedures:

Species were identified by trained observers in the field using physical characteristics.

Taxonomic_Classification:

Taxon_Rank_Name: Kingdom
Taxon_Rank_Value: Plantae
Taxonomic_Classification:

Taxon_Rank_Name: Subkingdom
Taxon_Rank_Value: Viridiplantae
Taxonomic_Classification:

Taxon_Rank_Name: Infrakingdom
Taxon_Rank_Value: Streptophyta
Taxonomic_Classification:

Taxon_Rank_Name: Superdivision
Taxon_Rank_Value: Embryophyta
Taxonomic_Classification:

Taxon_Rank_Name: Division
Taxon_Rank_Value: Tracheophyta
Taxonomic_Classification:

Taxon_Rank_Name: Subdivision
Taxon_Rank_Value: Spermatophytina
Taxonomic_Classification:

Taxon_Rank_Name: Class
Taxon_Rank_Value: Magnoliopsida
Taxonomic_Classification:

Taxon_Rank_Name: Superorder
Taxon_Rank_Value: Lilianae
Taxonomic_Classification:

Taxon_Rank_Name: Order
Taxon_Rank_Value: Alismatales
Taxonomic_Classification:

Taxon_Rank_Name: Family
Taxon_Rank_Value: Zosteraceae
Taxonomic_Classification:

Taxon_Rank_Name: Genus
Taxon_Rank_Value: Zostera
Taxonomic_Classification:

Taxon_Rank_Name: Species
Taxon_Rank_Value: Zostera marina
Applicable_Common_Name: TSN: 39074

Access_Constraints: None
Use_Constraints:

It is requested that the authors and the USGS Alaska Science Center be cited for any subsequent publications that reference this dataset.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey, Alaska Science Center

Contact_Address:

Address_Type: Mailing and Physical
Address: 4210 University Drive
City: Anchorage
State_or_Province: Alaska
Postal_Code: 99508
Country: USA

Contact_Voice_Telephone: 907-786-7000
Contact_Electronic_Mail_Address: ascweb@usgs.gov

Cross_Reference:

Citation_Information:

Originator: Hogrefe, K.R.
Originator: Ward, D.H.
Originator: Donnelly, T.F.
Originator: Dau, N.
Publication_Date: 2014
Title:

Establishing a Baseline for Regional Scale Monitoring of Eelgrass (Zostera marina) Habitat on the Lower Alaska Peninsula

Geospatial_Data_Presentation_Form: journal article
Series_Information:

Series_Name: Remote Sensing
Issue_Identification: 6(12):12447-12477

Publication_Information:

Publication_Place: online
Publisher: Multidisciplinary Digital Publishing Institute (MDPI)

Other_Citation_Details:

Hogrefe, K.R., Ward, D.H., Donnelly, T.F., Dau, N. 2014. Establishing a baseline for regional scale monitoring of eelgrass (Zostera marina) habitat on the lower Alaska Peninsula. Remote Sensing 6(12):12447-12477 doi:10.3390/rs61212447

Online_Linkage: https://doi.org/10.3390/rs61212447

Cross_Reference:

Citation_Information:

Originator: U.S. Geological Survey, Alaska Science Center
Publication_Date: unknown
Title:

List of Scientific Publications that Eelgrass Mapping Data from the USGS Alaska Science Center

Geospatial_Data_Presentation_Form: journal articles
Other_Citation_Details:

A full list of scientific publications that utilize eelgrass mapping data from the USGS Alaska Science Center is included with this data package, in the file "README_published_scientific_articles.pdf"

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Accuracy assessments of the mapped cover types were only conducted for Nanvak and Chagvan bays 2010. These evaluations indicated a classification accuracy of greater than or equal to 78% percent for eelgrass and unvegetated (water and bare ground combined) substrates.

Logical_Consistency_Report: Attribute values fall within expected ranges.
Completeness_Report:

Data set is considered complete for the information presented, as described in the abstract.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report: Imagery provided data at 30 m spatial resolution.

Lineage:

Methodology:

Methodology_Type: Field
Methodology_Description:

Ground-truth data were collected during field surveys and are reported in separate U.S. Geological Survey data releases (Ward 2021, Ward et al 2022). In July 2010, ground-truth data were collected at numerous points in three bays : Nanvak, Chagvan, and Goodnews.

In short, survey points were distributed across each of these embayments using a systematic design and accessed points by boat using a global positioning system (GPS) unit. Points were sampled by snorkeling in dry suits during high tide. At each point, substrate type and depth and percent cover of eelgrass and seaweeds were estimated within four 0.25 square meters quadrats.

We used the survey points to guide selection of training polygons for each classification category (Ozesmi and Bauer, 2002). This approach enabled the selection of training data across thousands of pixels in each of the images, greatly improving the accuracy of the classifications.

Methodology:

Methodology_Type: Field
Methodology_Description:

Aerial photography was acquired by the U.S. Fish and Wildlife Service 2005-2013. All imagery was obtained during low tides and peak seasonal abundance of eelgrass (July-August). The images were taken at an altitude of 2,500–7,000 feet, depending on the size of the site, using a Nikon D200 color digital camera mounted to the belly port of a Cessna 206. The images were mosaicked together, georectified to a larger base image, and classified to 3 land cover types: eelgrass, mud/sand, and channel.

Source_Information:

Source_Citation:

Citation_Information:

Originator: Hogrefe, K.R.
Originator: Ward, D.H.
Originator: Donnelly, T.F.
Originator: Dau, N.
Publication_Date: 2014
Title:

Establishing a Baseline for Regional Scale Monitoring of Eelgrass (Zostera marina) Habitat on the Lower Alaska Peninsula

Geospatial_Data_Presentation_Form: journal article
Series_Information:

Series_Name: Remote Sensing
Issue_Identification: 6(12):12447-12477

Publication_Information:

Publication_Place: online
Publisher: Multidisciplinary Digital Publishing Institute (MDPI)

Other_Citation_Details:

Online_Linkage: https://doi.org/10.3390/rs61212447

Type_of_Source_Media: publication
Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2014

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: Hogrefe et al 2014
Source_Contribution:

Describes techniques to identify eelgrass and seaweeds from satellite imagery

Source_Information:

Source_Citation:

Citation_Information:

Originator: Ozesmi, S.L.
Originator: Bauer, M.E.
Publication_Date: 2002
Title: Satellite Remote Sensing of Wetlands
Geospatial_Data_Presentation_Form: journal article
Series_Information:

Series_Name: Wetlands Ecology and Management
Issue_Identification: 10(5):381–402

Publication_Information:

Publication_Place: online
Publisher: Springer Nature

Other_Citation_Details:

Ozesmi, S.L., Bauer, M.E. 2002. Satellite remote sensing of wetlands. Wetlands Ecology and Management 10(5):381–402 doi:10.1023/A:1020908432489

Online_Linkage: https://doi.org/10.1023/A:1020908432489

Type_of_Source_Media: publication
Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2002

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: Ozesmi and Bauer 2002
Source_Contribution:

Describes techniques used to classify habitats from satellite imagery

Source_Information:

Source_Citation:

Citation_Information:

Originator: Ward, D.H.
Originator: Markon, C.J.
Originator: Douglas, D.C.
Publication_Date: 1997
Title:

Distribution and Stability of Eelgrass Beds at Izembek Lagoon, Alaska

Geospatial_Data_Presentation_Form: journal article
Series_Information:

Series_Name: Aquatic Botany
Issue_Identification: 58(3-4):229–240

Publication_Information:

Publication_Place: online
Publisher: Elsevier

Other_Citation_Details:

Ward, D.H., Markon, C.J., Douglas, D.C. 1997. Distribution and stability of eelgrass beds at Izembek Lagoon, Alaska. Aquatic Botany 58(3-4):229–240 doi:10.1016/S0304-3770(97)00037-5

Online_Linkage: https://doi.org/10.1016/S0304-3770(97)00037-5

Type_of_Source_Media: publication
Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1997

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: Ward et al 1997
Source_Contribution:

Describes techniques used to classify habitats from satellite imagery

Source_Information:

Source_Citation:

Citation_Information:

Originator: Chavez, P.S., Jr.
Publication_Date: 1988
Title:

An Improved Dark-Object Subtraction Technique for Atmospheric Scattering Correction of Multispectral Data

Geospatial_Data_Presentation_Form: journal article
Series_Information:

Series_Name: Remote Sensing of Environment
Issue_Identification: 58(3-4):229–240

Publication_Information:

Publication_Place: online
Publisher: Elsevier

Other_Citation_Details:

Chavez, P.S., Jr. 1988. An improved dark-object subtraction technique for atmospheric scattering correction of multispectral data. Remote Sensing of Environment 24(3):459–479 doi:10.1016/0034-4257(88)90019-3

Online_Linkage: https://doi.org/10.1016/0034-4257(88)90019-3

Type_of_Source_Media: publication
Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1988

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: Chavez 1988
Source_Contribution: Describes techniques used to analyze satellite imagery

Source_Information:

Source_Citation:

Citation_Information:

Originator: Andrefouet, S.
Originator: Muller-Karger, F.E.
Originator: Hochberg, E.J.
Originator: Hu, C.
Originator: Carder, K.L.
Publication_Date: 2001
Title:

Change Detection in Shallow Coral Reef Environments Ssing Landsat 7 ETM+ Data

Geospatial_Data_Presentation_Form: journal article
Series_Information:

Series_Name: Remote Sensing of Environment
Issue_Identification: 78(1-2):150–162

Publication_Information:

Publication_Place: online
Publisher: Elsevier

Other_Citation_Details:

Andrefouet, S., Muller-Karger, F.E., Hochberg, E.J., Hu, C., Carder, K.L. 2001. Change detection in shallow coral reef environments using Landsat 7 ETM+ data. Remote Sensing of Environment 78(1-2):150–162 doi:10.1016/S0034-4257(01)00256-5

Online_Linkage: https://doi.org/10.1016/S0034-4257(01)00256-5

Type_of_Source_Media: publication
Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2001

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: Andrefouet et al 2001
Source_Contribution: Describes techniques used to analyze satellite imagery

Source_Information:

Source_Citation:

Citation_Information:

Originator: Ward, D.H.
Publication_Date: 2021
Title:

Point Sampling Data for Eelgrass (Zostera marina) and Seaweed Distribution and Abundance in Bays Adjacent to the Togiak National Wildlife Refuge, Alaska, 2008-2010

Geospatial_Data_Presentation_Form: tabular digital data
Series_Information:

Series_Name: USGS Data Release
Issue_Identification: doi:10.5066/P92BMFTH

Publication_Information:

Publication_Place: online
Publisher: U.S. Geological Survey, Alaska Science Center

Other_Citation_Details:

Ward, D.H., 2021, Point sampling data for eelgrass (Zostera marina) and seaweed distribution and abundance in bays adjacent to the Togiak National Wildlife Refuge, Alaska, 2008-2010: U.S. Geological Survey data release, https://doi.org/10.5066/P92BMFTH

Online_Linkage: https://doi.org/10.5066/P92BMFTH

Type_of_Source_Media: digital database file
Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2021

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: Ward 2021
Source_Contribution:

Point sampling data of eelgrass and seaweeds in waters around Togiak NWR, used to ground-truth habitat classification.

Source_Information:

Source_Citation:

Citation_Information:

Originator: Ward, D.H.
Originator: Hogrefe, K.R.
Originator: Donnelly, T.F.
Publication_Date: 2022
Title:

Distribution of Eelgrass (Zostera marina) in Coastal Waters Adjacent to Togiak National Wildlife Refuge, Alaska

Geospatial_Data_Presentation_Form: publication
Series_Information:

Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: 2020-1080

Publication_Information:

Publication_Place: online
Publisher: U.S. Geological Survey

Other_Citation_Details:

Ward, D.H., Hogrefe, K.R., and Donnelly, T.F., 2022, Distribution of eelgrass in coastal waters adjacent to Togiak National Wildlife Refuge, Alaska: U.S. Geological Survey Open-File Report 2020-1080, 23 p., https://doi.org/10.3133/ofr20201080

Online_Linkage: https://doi.org/10.3133/ofr20201080

Type_of_Source_Media: publication
Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2020

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: Ward et al 2022
Source_Contribution:

Details about the field data collection and analysis of eelgrass distribution in waters around Togiak NWR, used to ground-truth habitat classification.

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Fish and Wildlife Service, Togiak National Wildlife Refuge
Publication_Date: Unknown
Title:

Aerial Photographic Imagery of Waters Adjacent to Togiak National Wildlife Refuge

Geospatial_Data_Presentation_Form: digital aerial photographs
Publication_Information:

Publication_Place: Dillingham, Alaska
Publisher: U.S. Fish and Wildlife Service, Togiak National Wildlife Refuge

Type_of_Source_Media: digital aerial photographs
Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 2005
Ending_Date: 2013

Source_Currentness_Reference: observed

Source_Citation_Abbreviation: Aerial Photographs
Source_Contribution: Aerial photographic imagery provided by Togiak NWR

Source_Information:

Source_Citation:

Citation_Information:

Originator: Ikonos-2
Publication_Date: Unknown
Title: Satellite Imagery from Ikonos-2
Geospatial_Data_Presentation_Form: raster digital data
Publication_Information:

Publication_Place: online
Publisher: Digital Globe

Other_Citation_Details:

Downloaded from Digital Globe https://discover.digitalglobe.com

Query parameters and Scene Identifiers are provided in the table "remoteImage_identifiers_togiak_ward.csv" included with this data package.

Online_Linkage: https://discover.digitalglobe.com

Type_of_Source_Media: online database
Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20020807
Ending_Date: 20030821

Source_Currentness_Reference: observed

Source_Citation_Abbreviation: Ikonos-2
Source_Contribution:

Ikonos-2 satellite imagery used to classify eelgrass and seaweed beds in waters around Togiak NWR

Source_Information:

Source_Citation:

Citation_Information:

Originator: Quickbird-2
Publication_Date: Unknown
Title: Satellite Imagery from Quickbird-2
Geospatial_Data_Presentation_Form: raster digital data
Publication_Information:

Publication_Place: online
Publisher: Digital Globe

Other_Citation_Details:

Downloaded from Digital Globe https://discover.digitalglobe.com

Query parameters and Scene Identifiers are provided in the table "remoteImage_identifiers_togiak_ward.csv" included with this data package.

Online_Linkage: https://discover.digitalglobe.com

Type_of_Source_Media: online database
Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 20040629

Source_Currentness_Reference: observed

Source_Citation_Abbreviation: Quickbird-2
Source_Contribution:

Quickbird-2 satellite imagery used to classify eelgrass and seaweed beds in waters around Togiak NWR

Process_Step:

Process_Description:

Photomosaics of aerial images were georeferenced and projected in the WGS84 datum, UTM Zone 4N. Most photomosaics had an initial resolution of less than 1 m and were standardized to 1 m resolution except the photomosaic of Hagemeister Spit, which had an initial resolution of greater than 1 m and was resampled to a 2 m resolution.

Source_Used_Citation_Abbreviation: Landsat_2002-2009
Process_Date: Unknown

Spatial_Data_Organization_Information:

Indirect_Spatial_Reference:

Location names are local geographic place names of sampling areas and do not describe precise geographic points.

Direct_Spatial_Reference_Method: Vector

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:

UTM_Zone_Number: 4
Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -159.0
Latitude_of_Projection_Origin: 0
False_Easting: 500000
False_Northing: 0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:

Abscissa_Resolution: 1
Ordinate_Resolution: 1

Planar_Distance_Units: meters

Geodetic_Model:

Horizontal_Datum_Name: World Geodetic System of 1984
Ellipsoid_Name: World Geodetic System of 1984
Semi-major_Axis: 6378137
Denominator_of_Flattening_Ratio: 298.257223563

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: remoteImage_identifiers_togiak_ward.csv
Entity_Type_Definition:

Table with image sources, identifiers, and query parameters of all images used to classify bays round Togiak NWR. Presented in a Comma Separated Value (CSV) formatted table.

Entity_Type_Definition_Source: Author defined

Attribute:

Attribute_Label: Site_ID
Attribute_Definition:

Identifier for each site analyzed. The mapped location of each Site_ID is shown in the browse image "eelgrass_siteIDs_togiak_ward.tif" included with this data package. Corresponds to the 'Reference Number' column in Ward et al 2022 (Table 1).

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Unrepresentable_Domain: Identifier for each site analyzed.

Attribute:

Attribute_Label: Location
Attribute_Definition:

Name of the bay or connecting section of coastline. Corresponds to 'Location' attribute in the other tables included with this data package and Ward et al 2022 (Table 1).

Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Metervik Bay
Enumerated_Domain_Value_Definition:

Metervik Bay (Bristol Bay), Alaska (approximately 58.84 N, 159.80 W)

Enumerated_Domain_Value_Definition_Source: USGS Geographic Names Information System (GNIS)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Nunavachak Bay
Enumerated_Domain_Value_Definition:

Nunavachak Bay (Bristol Bay), Alaska; north inlet (approximately 58.86 N, 159.99 W); south inlet (approximately 58.84 N, 159.98 W)

Enumerated_Domain_Value_Definition_Source: USGS Geographic Names Information System (GNIS)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Ungalikthluk Bay
Enumerated_Domain_Value_Definition:

Ungalikthluk Bay (Bristol Bay), Alaska (approximately 58.91 N, 160.17 W)

Enumerated_Domain_Value_Definition_Source: USGS Geographic Names Information System (GNIS)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Togiak Bay (Rocky Point1)
Enumerated_Domain_Value_Definition:

Bay north of Ungalikthluk Bay (Kuskokwim Bay), Alaska (approximately 58.94 N, 160.27 W); corresponds to 'Rocky Pt (5)' in the file "eelgrass_ikonosQuickbirdDerived_togiak" included with this data package

Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Togiak Bay (Rocky Point2) through Togiak Bay (Rocky Point4)
Enumerated_Domain_Value_Definition:

Inlets within Togiak Bay (Kuskokwim Bay), Alaska; Point2 (approximately 58.94 N, 160.30 W); Point3 (approximately 58.96 N, 160.32 W); Point4 (approximately 58.97 N, 160.30 W). Not analyzed because no adequate imagery was located for these locations.

Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Togiak Bay
Enumerated_Domain_Value_Definition:

Bays within Togiak Bay (Kuskokwim Bay), Alaska (approximately 58.98 N, 160.27 W).

Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Tongue Point (Matogak Point)
Enumerated_Domain_Value_Definition:

Tongue Point (Bristol Bay), Alaska (approximately 58.85 N, 160.85 W)

Enumerated_Domain_Value_Definition_Source: USGS Geographic Names Information System (GNIS)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Estus Point (Osviakestus Pt)
Enumerated_Domain_Value_Definition:

Point at outlet of Osviak River (Bristol Bay), Alaska (approximately 58.79 N, 161.16 W)

Enumerated_Domain_Value_Definition_Source: USGS Geographic Names Information System (GNIS)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Estus Point (Osviakestus L)
Enumerated_Domain_Value_Definition:

Osviestus Lagoon, in Hagemeister Strait (Kuskokwim Bay), Alaska (approximately 58.785 N, 161.22 W)

Enumerated_Domain_Value_Definition_Source: USGS Geographic Names Information System (GNIS)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Hagemeister Straight
Enumerated_Domain_Value_Definition:

Hagemeister Strait (Bristol Bay), Alaska (approximately 58.72 N, 161.34 W). Not analyzed because no adequate imagery was located for these locations.

Enumerated_Domain_Value_Definition_Source: USGS Geographic Names Information System (GNIS)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Asigyakpuk Spit
Enumerated_Domain_Value_Definition:

Asigyakpuk Spit on mainland across from Hagemeister Spit (Bristol Bay), Alaska (approximately 58.68 N, 161.34 W)

Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Hagemeister Spit
Enumerated_Domain_Value_Definition:

Spit at west end of Hagemeister Island (Bristol Bay), Alaska (approximately 58.66 N, 161.09 W)

Enumerated_Domain_Value_Definition_Source: USGS Geographic Names Information System (GNIS)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Hagemeister Strait (North End)
Enumerated_Domain_Value_Definition:

North end of Hagemeister Island (Bristol Bay), Alaska; south inlet (approximately 58.77 N, 160.80 W); central inlet (approximately 58.78 N, 160.77 W); north inlet (approximately 58.80 N, 160.72 W)

Enumerated_Domain_Value_Definition_Source: USGS Geographic Names Information System (GNIS)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Nanvak Lagoon
Enumerated_Domain_Value_Definition:

Nanvak Bay (Kuskokwim Bay), Alaska (approximately 58.61 N, 161.73 W)

Enumerated_Domain_Value_Definition_Source: USGS Geographic Names Information System (GNIS)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Security Cove
Enumerated_Domain_Value_Definition:

Security Cove (Kuskokwim Bay), Alaska (approximately 58.65 N, 161.94 W)

Enumerated_Domain_Value_Definition_Source: USGS Geographic Names Information System (GNIS)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Chagvan Lagoon
Enumerated_Domain_Value_Definition:

Chagvan Bay (Kuskokwim Bay), Alaska (approximately 58.78 N, 161.71 W)

Enumerated_Domain_Value_Definition_Source: USGS Geographic Names Information System (GNIS)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Goodnews Bay (South Spit)
Enumerated_Domain_Value_Definition:

South Goodnews Bay (Kuskokwim Bay), Alaska (approximately 59.03 N, 161.80 W); corresponds to 'S Goodnews Bay' in the file "eelgrass_ikonosQuickbirdDerived_togiak" included with this data package.

Enumerated_Domain_Value_Definition_Source: USGS Geographic Names Information System (GNIS)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Goodnews Bay (North Spit)
Enumerated_Domain_Value_Definition:

Northwest Goodnews Bay (Kuskokwim Bay), Alaska (approximately 59.08 N, 161.86 W); corresponds to 'NW Goodnews Bay' in the file "eelgrass_ikonosQuickbirdDerived_togiak" included with this data package.

Enumerated_Domain_Value_Definition_Source: USGS Geographic Names Information System (GNIS)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Goodnews Bay (Central)
Enumerated_Domain_Value_Definition:

Northeast Goodnews Bay (Kuskokwim Bay), Alaska (approximately 59.08 N, 161.76 W); corresponds to 'NE Goodnews Bay' in the file "eelgrass_ikonosQuickbirdDerived_togiak" included with this data package

Enumerated_Domain_Value_Definition_Source: USGS Geographic Names Information System (GNIS)

Attribute:

Attribute_Label: Image_Source
Attribute_Definition: Source of imagery
Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Aerial photography
Enumerated_Domain_Value_Definition: Aerial photographic imagery provided by Togiak NWR
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Ikonos-2
Enumerated_Domain_Value_Definition:

Ikonos-2 satellite downloaded from Digital Globe https://discover.digitalglobe.com

Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Quickbird-2
Enumerated_Domain_Value_Definition:

Quickbird-2 satellite downloaded from Digital Globe https://discover.digitalglobe.com

Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: None
Enumerated_Domain_Value_Definition: No adequate imagery was located for this location
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute:

Attribute_Label: Date_Acquired
Attribute_Definition: Date of image acquisition
Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 2002-06-30
Range_Domain_Maximum: 2013-08-05
Attribute_Units_of_Measure: Date (YYYY-MM-DD)

Attribute:

Attribute_Label: Timestamp
Attribute_Definition: Date and time (UTC) of image acquisition
Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 2002-06-30T22:21:28Z
Range_Domain_Maximum: 2004-06-29T22:03:19.287246Z
Attribute_Units_of_Measure: Date Time UTC (YYYY-MM-DDTHH:mm:ss.ssssss)

Attribute:

Attribute_Label: Image_Identifier
Attribute_Definition: Unique identifier for each satellite image
Attribute_Definition_Source: EROS_Landsat
Attribute_Domain_Values:

Unrepresentable_Domain:

Unique identifier for each satellite image. A concatenation of Timestamp and an identifying number.

Attribute:

Attribute_Label: DigitalGlobe_ID
Attribute_Definition: Unique identifier for each Landsat image
Attribute_Definition_Source: EROS_Landsat
Attribute_Domain_Values:

Unrepresentable_Domain:

Unique identifier for each satellite image downloaded from Digital Globe.

Detailed_Description:

Entity_Type:

Entity_Type_Label: eelgrass_aerialPhotoDerived_togiak_ward
Entity_Type_Definition:

Vector polygon geospatial file delineating eelgrass beds in waters adjacent to Togiak National Wildlife Refuge. Eelgrass beds were determined by interpretation of photomosaiced aerial photos (Hogrefe et al 2014). Presented in both Esri shapefile (SHP) and Keyhole Markup Language (KML) formats. Additionally, a JPG browse map is provided for convenience of viewing.

Entity_Type_Definition_Source: Author defined

Attribute:

Attribute_Label: Id
Attribute_Definition: Sequential numerical identifier of feature assigned by ArGIS
Attribute_Definition_Source: Esri
Attribute_Domain_Values:

Unrepresentable_Domain: Sequential numerical identifier of feature

Attribute:

Attribute_Label: grid_code
Attribute_Definition: Raster value from classified raster grid, generated by ArcGIS
Attribute_Definition_Source: Esri
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1
Range_Domain_Maximum: 1

Attribute:

Attribute_Label: Location
Attribute_Definition: Name of the bay or connecting section of coastline.
Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Chagvan Lagoon
Enumerated_Domain_Value_Definition:

Chagvan Bay (Kuskokwim Bay), Alaska (approximately 58.78 N, 161.71 W)

Enumerated_Domain_Value_Definition_Source: USGS Geographic Names Information System (GNIS)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Hagemeister Spit
Enumerated_Domain_Value_Definition:

Spit at west end of Hagemeister Island (Bristol Bay), Alaska (approximately 58.66 N, 161.09 W)

Enumerated_Domain_Value_Definition_Source: USGS Geographic Names Information System (GNIS)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Matogak Point
Enumerated_Domain_Value_Definition:

Tongue Point (Bristol Bay), Alaska (approximately 58.85 N, 160.85 W)

Enumerated_Domain_Value_Definition_Source: USGS Geographic Names Information System (GNIS)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Metervik Bay
Enumerated_Domain_Value_Definition:

Metervik Bay (Bristol Bay), Alaska (approximately 58.84 N, 159.80 W)

Enumerated_Domain_Value_Definition_Source: USGS Geographic Names Information System (GNIS)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Nanvak Lagoon
Enumerated_Domain_Value_Definition:

Nanvak Bay (Kuskokwim Bay), Alaska (approximately 58.61 N, 161.73 W)

Enumerated_Domain_Value_Definition_Source: USGS Geographic Names Information System (GNIS)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Nunavachak Bay
Enumerated_Domain_Value_Definition:

Nunavachak Bay (Bristol Bay), Alaska; north inlet (approximately 58.86 N, 159.99 W); south inlet (approximately 58.84 N, 159.98 W)

Enumerated_Domain_Value_Definition_Source: USGS Geographic Names Information System (GNIS)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Security Cove
Enumerated_Domain_Value_Definition:

Security Cove (Kuskokwim Bay), Alaska (approximately 58.65 N, 161.94 W)

Enumerated_Domain_Value_Definition_Source: USGS Geographic Names Information System (GNIS)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Togiak Bay
Enumerated_Domain_Value_Definition:

Togiak Bay (Bristol Bay), Alaska (approximately 58.98 N, 160.27 W)

Enumerated_Domain_Value_Definition_Source: USGS Geographic Names Information System (GNIS)

Attribute:

Attribute_Label: Shape_Length
Attribute_Definition: Length of polygon perimeter in internal units.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 4
Range_Domain_Maximum: 909536

Attribute:

Attribute_Label: Shape_Area
Attribute_Definition: Area of feature in internal units squared.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1
Range_Domain_Maximum: 17835069

Detailed_Description:

Entity_Type:

Entity_Type_Label: eelgrass_ikonosQuickbirdDerived_togiak_ward
Entity_Type_Definition:

Vector polygon geospatial file delineating eelgrass beds in waters adjacent to Togiak National Wildlife Refuge. Eelgrass beds were determined by interpretation of satellite imagery from the Ikonos-2 and Quickbird-2 satellites. Presented in both Esri shapefile (SHP) and Keyhole Markup Language (KML) formats. Additionally, a JPG browse map is provided for convenience of viewing.

Entity_Type_Definition_Source: Author defined

Attribute:

Attribute_Label: Id
Attribute_Definition: Sequential numerical identifier of feature assigned by ArGIS
Attribute_Definition_Source: Esri
Attribute_Domain_Values:

Unrepresentable_Domain: Sequential numerical identifier of feature

Attribute:

Attribute_Label: grid_code
Attribute_Definition: Raster value from classified raster grid, generated by ArcGIS.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1
Range_Domain_Maximum: 1

Attribute:

Attribute_Label: Location
Attribute_Definition: Name of the bay or connecting section of coastline.
Attribute_Definition_Source: Author defined
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Asigyakpuk Spit
Enumerated_Domain_Value_Definition:

Asigyakpuk Spit on mainland across from Hagemeister Spit (Bristol Bay), Alaska (approximately 58.68 N, 161.34 W)

Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Hagemeister Straight
Enumerated_Domain_Value_Definition:

North end of Hagemeister Island (Bristol Bay), Alaska; south inlet (approximately 58.77 N, 160.80 W); central inlet (approximately 58.78 N, 160.77 W); north inlet (approximately 58.80 N, 160.72 W)

Enumerated_Domain_Value_Definition_Source: USGS Geographic Names Information System (GNIS)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: NE Goodnews Bay
Enumerated_Domain_Value_Definition:

Northeast Goodnews Bay (Kuskokwim Bay), Alaska (approximately 59.08 N, 161.76 W); corresponds to 'Goodnews Bay (Central)' in the file "remoteImagery_imageIdentifiers_togiak.csv" included with this data package

Enumerated_Domain_Value_Definition_Source: USGS Geographic Names Information System (GNIS)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: NW Goodnews Bay
Enumerated_Domain_Value_Definition:

Northwest Goodnews Bay (Kuskokwim Bay), Alaska (approximately 59.08 N, 161.86 W); corresponds to 'Goodnews Bay (North Spit)' in the file "remoteImagery_imageIdentifiers_togiak.csv" included with this data package.

Enumerated_Domain_Value_Definition_Source: USGS Geographic Names Information System (GNIS)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: S Goodnews Bay
Enumerated_Domain_Value_Definition:

South Goodnews Bay (Kuskokwim Bay), Alaska (approximately 59.03 N, 161.80 W); corresponds to 'Goodnews Bay (South Spit)' in the file "remoteImagery_imageIdentifiers_togiak.csv" included with this data package.

Enumerated_Domain_Value_Definition_Source: USGS Geographic Names Information System (GNIS)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Osviestus Lagoon
Enumerated_Domain_Value_Definition:

Osviestus Lagoon, in Hagemeister Strait (Kuskokwim Bay), Alaska (approximately 58.785 N, 161.22 W)

Enumerated_Domain_Value_Definition_Source: USGS Geographic Names Information System (GNIS)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Osviestus Point
Enumerated_Domain_Value_Definition:

Point at outlet of Osviak River (Bristol Bay), Alaska (approximately 58.79 N, 161.16 W)

Enumerated_Domain_Value_Definition_Source: USGS Geographic Names Information System (GNIS)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Rocky Pt (5)
Enumerated_Domain_Value_Definition:

Bay north of Ungalikthluk Bay (Kuskokwim Bay), Alaska (approximately 58.94 N, 160.27 W); corresponds to 'Togiak Bay (Rocky Point1)' in the file "remoteImagery_imageIdentifiers_togiak.csv" included with this data package.

Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Ungalikthluk Bay
Enumerated_Domain_Value_Definition:

Ungalikthluk Bay (Bristol Bay), Alaska (approximately 58.91 N, 160.17 W)

Enumerated_Domain_Value_Definition_Source: USGS Geographic Names Information System (GNIS)

Attribute:

Attribute_Label: Shape_Length
Attribute_Definition: Length of polygon perimeter in internal units.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 7
Range_Domain_Maximum: 272456

Attribute:

Attribute_Label: Shape_Area
Attribute_Definition: Area of feature in internal units squared.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 3
Range_Domain_Maximum: 5091984

Detailed_Description:

Entity_Type:

Entity_Type_Label: aerialPhotomosaic_togiak_ward
Entity_Type_Definition:

Folder with ortho-rectified aerial photomosaics of twelve bays adjacent to Togiak National Wildlife Refuge. Photos taken July-August 2005-2013; dates are provided in the table "remoteImage_identifiers_togiak_ward.csv" included with this data package. Photomosaics were used for delineating the seagrass and seaweed classifications provided in this data package. Presented in GeoTIFF format.

Filenames: aerialPhotomosaic_[bay name].tif

Entity_Type_Definition_Source: Author defined

Mapping Data of Eelgrass (Zostera marina) Distribution, Togiak National Wildlife Refuge, Alaska

Metadata: