Metadata: Identification_Information: Citation: Citation_Information: Originator: Joseph F. Terrano Originator: Kathryn E.L. Smith Originator: Jonathan Pitchford Originator: Julius McIlwain Originator: Michael Archer Publication_Date: 20180911 Title: Vectorized Marsh Shorelines for the Grand Bay National Estuarine Research Reserve in Mississippi and Alabama from 1848 to 2017 Geospatial_Data_Presentation_Form: Vector Digital Data Set (Polyline) Series_Information: Series_Name: U.S. Geological Survey Data Release Issue_Identification: doi:10.5066/P9JMA8WK Publication_Information: Publication_Place: St. Petersburg, FL Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/P9JMA8WK Description: Abstract: This dataset represents a compilation of vector shorelines in the Grand Bay National Estuarine Research Reserve (Mississippi and Alabama) from 1848 to 2017. Shoreline data were obtained from multiple data sources, including the U.S. Geological Survey (USGS), the National Oceanic and Atmospheric Administration (NOAA), the Grand Bay National Estuarine Research Reserve (GBNERR), and the Mississippi Office of Geology (MOG). All shoreline data types have uncertainty associated with delineating the shoreline location, particularly with vegetated coastlines. For this study, the "apparent shoreline" was mapped for all data sources. The "apparent shoreline" is defined as "where the actual shoreline is obscured by marsh, mangrove, cypress, or other type of marine vegetation, the outer edge of the vegetation is mapped” (Shalowitz, 1964). In the case of aerial imagery, vegetation-water boundary was digitized. Field-surveys identified the edge of the dominate vegetation or the eroding scarp line. Shorelines were obtained from the original provider, or digitized, and merged into a single file, in order to conduct shoreline change analyses. Datasets were compiled and analyzed using the R package Analyzing Moving Boundaries Using R (AMBUR) program. Rates of shoreline change can be used for evaluating living shoreline resources, decision-making for future resource planning, and restoration of both protected and open-ocean shorelines. This data release contains shorelines from 1848-2017 along with transects with rates of change joined to the data table. This metadata record should be reviewed in its entirety to ensure specific data is suitable for other studies as some shorelines were specifically digitized for use with transects in this study. Shorelines from 1942, 1975, 1986, 1992, 2004, 2006, 2014 have limited spatial resolution. All shorelines labeled GBNERR in the “Source” field of the attribute table, and 2016 and 2017 GPS shorelines from the USGS, are previously unpublished data sets. Purpose: The purpose of these data is for the calculation of shoreline change for marsh shorelines of the GBNERR from 1848 to 2017. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 18480101 Ending_Date: 20171017 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -88.524070 East_Bounding_Coordinate: -88.299698 North_Bounding_Coordinate: 30.426350 South_Bounding_Coordinate: 30.316734 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:2d96b343-7559-4b06-a38c-a33428331b6e Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Shoreline data Theme_Keyword: Shoreline map Theme_Keyword: topographic map Theme_Keyword: global positioning system Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: coastal processes Theme_Keyword: aerial photography Theme_Keyword: digitization Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: oceans Theme_Keyword: environment Theme_Keyword: boundaries Theme_Keyword: geoscientificInformation Place: Place_Keyword_Thesaurus: None Place_Keyword: Grand Bay National Estuarine Reserch Reserve Place_Keyword: Gulf of Mexico Place_Keyword: USA Place_Keyword: Mississippi Place_Keyword: Alabama Place_Keyword: MS Place_Keyword: AL Access_Constraints: None Use_Constraints: The U.S. Geological Survey requests to be acknowledged as originator of the data in future products or derivative research. This metadata record should be reviewed in its entirety to ensure specific data is suitable for other studies as some shorelines (1942, 1975, 1986, 1992, 2004, 2006, and 2014) were specifically digitized for use with transects in this study. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey St Petersburg Coastal and Marine Science Center Contact_Person: Joseph F. Terrano Contact_Position: Contractor Contact_Address: Address_Type: Mailing Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Contact_Voice_Telephone: 727-502-8047 Contact_Facsimile_Telephone: 727-502-8182 Contact_Electronic_Mail_Address: terranoj@usgs.gov Data_Set_Credit: Acknowledgment of the U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, as a data source would be appreciated in products developed from these data, and such acknowledgment as is standard for citation and legal practices. Sharing of new data layers developed directly from these data would also be appreciated by the U.S. Geological Survey staff. Users should be aware that comparisons with other datasets for the same area from other time periods may be inaccurate due to inconsistencies resulting from changes in photointerpretation, mapping conventions, and digital processes over time. These data are not legal documents and are not to be used as such. Native_Data_Set_Environment: Environment as of Metadata Creation: Microsoft Windows 10 Version 1709 (Build 16299.431); Esri ArcGIS 10.5.1 (Build 7333) Service Pack N/A (Build N/A) Cross_Reference: Citation_Information: Originator: Hapke, C.J., Himmelstoss, E.A., Kratzmann, M.G., List, J.H. and Thieler, E.R. Publication_Date: 2011 Title: National assessment of shoreline change: Historical shoreline change along the New England and Mid-Atlantic coasts Series_Information: Series_Name: U.S Geological Survey Open-File Report Issue_Identification: 2010-1118 Publication_Information: Publication_Place: St.Petersburg Publisher: U.S. Geological Survey Online_Linkage: https://pubs.er.usgs.gov/publication/ofr20101118 Cross_Reference: Citation_Information: Originator: Jackson, C.W., Jr. Publication_Date: 2010 Title: Basic User Guide for the AMBUR package for R, version 1.0a. Publication_Information: Publication_Place: Unknown Publisher: Unknown Other_Citation_Details: User guide includes requirements for shorelines that are to be run through AMBUR Online_Linkage: http://ambur.r-forge.r-project.org/user/ambur%20basic%20user%20guide%201_0a.pdf. Cross_Reference: Citation_Information: Originator: Aaron L. Shalowitz Publication_Date: 1964 Title: Shore and Sea Boundries (Volume 2) Publication_Information: Publication_Place: Washington D.C. Publisher: US Government Printing Office. Other_Citation_Details: Defines an "apparent shoreline" on page 177. Online_Linkage: https://nauticalcharts.noaa.gov/publications/docs/shore-and-sea-boundaries/shore-and-sea-boundaries-vol-2.pdf Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: No formal attribute accuracy tests were conducted. Logical_Consistency_Report: Vector shoreline features and attributes were checked for completeness and accuracy. Completeness_Report: Dataset is considered complete for the information presented. Some dated shorelines do not have complete coverage over the entire study area (for example, 2017 shorelines were collected using a GPS system and are only available for select study areas); however, this was acceptable as the analysis method accounts for the available dates only. In addition, select shoreline dates (1848, 1942, 1975, 1986, 1992, 2004, 2006, and 2014) were created using a point intersection of shoreline and transect, and are intended for use only with the transects also published in this data release. Users are advised to read the rest of the metadata record carefully for additional details. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: A formal accuracy assessment of the horizontal positional information in the dataset has not been conducted. Elevation and water levels were not addressed in this study. For additional information on data collection techniques see the source metadata. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Several factors may influence the accuracy and uncertainty of shoreline position for vegetated shorelines, such as water level. Water level at the time of imagery collection is largely unknown for most historical imagery, therefore we cannot account for shoreline positional errors associated with water level. Published uncertainty estimates for sandy shorelines were used for all shorelines in this study, with the exception of 1993, 1995, 1999, 2001, 2010, 2012, and 2017. Shorelines in this study, with the exception of the dates above, should be regarded as less conservative than errors that may account for uncertainty in digitization of vegetated shorelines from aerial imagery. For additional information on data collection techniques see the source metadata. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: National Oceanic and Atmospheric Administration Publication_Date: Unknown Title: Vectorized Shorelines of Mississippi and Alabama coastlines for 1848, 1917 and 1957– Shorelines derived from NOAA NOS Coastal Survey Maps Geospatial_Data_Presentation_Form: vector digital data Publication_Information: Publication_Place: Silver Spring, Maryland Publisher: U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Ocean Service Online_Linkage: https://shoreline.noaa.gov/data/datasheets/t-sheets.html Type_of_Source_Media: digital data Source_Time_Period_of_Content: Time_Period_Information: Multiple_Dates/Times: Single_Date/Time: Calendar_Date: 1848 Single_Date/Time: Calendar_Date: 1917 Single_Date/Time: Calendar_Date: 1957 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: T10743, T10744, T10745, T10746, T10752 T03702, T10753, T10754, T10755 and T00273. Source_Contribution: Historical shoreline data source Source_Information: Source_Citation: Citation_Information: Originator: Paul R. Nelson, Craig Felson, and Joseph F. Terrano Publication_Date: 20180911 Title: Vectorized transect based shorelines of Mississippi and Alabama coastlines for 1942, 1975, 1986, 1992, 2004, 2006, and 2014 Geospatial_Data_Presentation_Form: vector digital data Publication_Information: Publication_Place: Saint Petersburg, FL Publisher: U.S. Geological Survey Coastal and Marine Science Center Online_Linkage: https://doi.org/10.5066/P9JMA8WK Type_of_Source_Media: digital data Source_Time_Period_of_Content: Time_Period_Information: Multiple_Dates/Times: Single_Date/Time: Calendar_Date: 19420401 Single_Date/Time: Calendar_Date: 19751001 Single_Date/Time: Calendar_Date: 19860101 Single_Date/Time: Calendar_Date: 19920201 Single_Date/Time: Calendar_Date: 20040801 Single_Date/Time: Calendar_Date: 20060901 Single_Date/Time: Calendar_Date: 20141001 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: transect based shorelines Source_Contribution: Shorelines were digitized based on transect/shoreline intersect locations and are published as part of this data release (https://doi.org/10.5066/P9JMA8WK) Source_Information: Source_Citation: Citation_Information: Originator: Mississippi Office of Geology Publication_Date: 20030501 Title: Vectorized Shoreline of the GBNERR derived from MOG GPS shorelines for 1993, 1995, 1999, and 2001 Geospatial_Data_Presentation_Form: vector digital data Publication_Information: Publication_Place: Jackson, Mississippi Publisher: Mississippi Office of Geology Online_Linkage: https://geology.deq.ms.gov/coastal/Shorelines-GPS.htm Type_of_Source_Media: digital data Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19930101 Ending_Date: 20011001 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: 1993_MS_Coastline, 1995_MS_Coastline, 1999_MS_Coastline, 2001_MS_Coastline Source_Contribution: Historical GPS shoreline data source Source_Information: Source_Citation: Citation_Information: Originator: Paul R. Nelson, Stephen T. Bosse, and Christopher G. Smith Publication_Date: 20180518 Title: A GIS Compilation of Vector Shorelines Derived from Aerial Imagery for the Grand Bay Region of Mississippi and Alabama: 2010 and 2012 Geospatial_Data_Presentation_Form: vector digital data Publication_Information: Publication_Place: Saint Petersburg, FL Publisher: U.S. Geological Survey Coastal and Marine Science Center Online_Linkage: https://doi.org/10.5066/F7VT1R8Q Type_of_Source_Media: digital data Source_Time_Period_of_Content: Time_Period_Information: Multiple_Dates/Times: Single_Date/Time: Calendar_Date: 20100330 Single_Date/Time: Calendar_Date: 20100524 Single_Date/Time: Calendar_Date: 20120924 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: GrandBay_2010_Shoreline.shp and GrandBay_2012_Shoreline.shp Source_Contribution: Historical shoreline data source Source_Information: Source_Citation: Citation_Information: Originator: Jonathan Pichford, Julius McIlwain, and Michael Archer Publication_Date: 20180911 Title: Historical GPS Shorelines the Grand Bay National Estuarine Research Reserve from 2013 to 2017 Geospatial_Data_Presentation_Form: vector digital data Publication_Information: Publication_Place: St Petersburg, Florida Publisher: U.S. Geological Survey Other_Citation_Details: Shorelines were published with permission from the Grand Bay National Estuarine Research Reserve. Data contact for all GBNERR shorelines is Jonathan Pitchford (jonathan.pitchford@dmr.ms.gov). Online_Linkage: https://doi.org/10.5066/P9JMA8WK Type_of_Source_Media: digital data Source_Time_Period_of_Content: Time_Period_Information: Multiple_Dates/Times: Single_Date/Time: Calendar_Date: 20130919 Single_Date/Time: Calendar_Date: 20140313 Single_Date/Time: Calendar_Date: 20140520 Single_Date/Time: Calendar_Date: 20140910 Single_Date/Time: Calendar_Date: 20141117 Single_Date/Time: Calendar_Date: 20150224 Single_Date/Time: Calendar_Date: 20150608 Single_Date/Time: Calendar_Date: 20150611 Single_Date/Time: Calendar_Date: 20150922 Single_Date/Time: Calendar_Date: 20151210 Single_Date/Time: Calendar_Date: 20160301 Single_Date/Time: Calendar_Date: 20160512 Single_Date/Time: Calendar_Date: 20160815 Single_Date/Time: Calendar_Date: 20161107 Single_Date/Time: Calendar_Date: 20170208 Single_Date/Time: Calendar_Date: 20170501 Single_Date/Time: Calendar_Date: 20170814 Single_Date/Time: Calendar_Date: 20171108 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: erosion_20130919.shp, erosion_20140313.shp, erosion_20140520.shp, erosion_20140910.shp, erosion_20141117.shp, erosion_20150224.shp, erosion_20150608.shp, erosion_20150611.shp, erosion_20150922.shp, erosion_20151210.shp, erosion_20160301.shp, erosion_20160512.shp, erosion_20160815.shp, erosion_20161107.shp, erosion_20170208.shp, erosion_20170501.shp, erosion_20170814.shp, and erosion_20171108.shp Source_Contribution: Historical GPS shoreline data source- provided by the GBNERR staff and published as part of this study (https://doi.org/10.5066/P9JMA8WK) Source_Information: Source_Citation: Citation_Information: Originator: Joseph F. Terrano, Kathryn E.L. Smith, Nicole Khan, and Chelsea Stalk Publication_Date: 20180911 Title: 2017 GPS shorelines for the Grand Bay National Estuarine Research Reserve Geospatial_Data_Presentation_Form: vector digital data Publication_Information: Publication_Place: Saint Petersburg, FL Publisher: U.S. Geological Coastal and Marine Science Center Online_Linkage: https://doi.org/10.5066/P9JMA8WK Type_of_Source_Media: digital data Source_Time_Period_of_Content: Time_Period_Information: Multiple_Dates/Times: Single_Date/Time: Calendar_Date: 20170120 Single_Date/Time: Calendar_Date: 20170420 Single_Date/Time: Calendar_Date: 20170722 Single_Date/Time: Calendar_Date: 20171005 Single_Date/Time: Calendar_Date: 20171017 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: GPS_Shorelines_2017_USGS Source_Contribution: GPS shoreline data for select areas of Grand Bay Process_Step: Process_Description: Shorelines for 1942, 1975, 1986, 1992, 2004, 2006, and 2014 were downloaded from various internet sources and digitized within ArcGIS 10.5.1 at locations where the transects (also available at, https://doi.org/10.5066/P9JMA8WK) and shorelines intersected. Using XTools Pro (v.17) "polylines from points" tool, vector shorelines were created. The location between each point was interpolated so the specific shoreline location between each point might not represent the actual shoreline position. To see the transect intersection locations, the ArcGIS editor toolbar can be used. Shorelines are not previously published and are available through this data release webpage (https://doi.org/10.5066/P9JMA8WK). Source_Used_Citation_Abbreviation: Vectorized transect based shorelines for 1942, 1975, 1986, 1992, 2004, 2006, and 2014. Process_Date: 2018 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Joseph Terrano Contact_Position: Researcher III Contact_Address: Address_Type: mailing and physical Address: 600 4th Street South City: St.Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: 727-502-8047 Contact_Electronic_Mail_Address: jterrano@usgs.gov Process_Step: Process_Description: GPS shorelines from various dates in 2013, 2014, 2015, 2016, and 2017 were generated by the Grand Bay National Estuarine Research Reserve Staff. Shoreline locations were derived by walking along the shoreline with a GPS unit. GPS points were processed by the GBNERR staff and converted to vector lines by the USGS using XTools Pro (v.17) "polylines from points" tool. The location between each point was interpolated so the specific shoreline location between each point might not represent the actual shoreline position. To see the transect intersection locations, the ArcGIS editor toolbar can be used. Shorelines are not previously published and are available through this data release webpage (https://doi.org/10.5066/P9JMA8WK). Process_Date: 2018 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Jonathan Pitchford Contact_Position: Stewardship Coordinator Contact_Address: Address_Type: mailing and physical Address: 6005 Bayou Heron Road City: Moss Point State_or_Province: MS Postal_Code: 39562 Country: USA Contact_Voice_Telephone: 228-523-4009 Contact_Electronic_Mail_Address: jonathan.pitchford@dmr.ms.gov Process_Step: Process_Description: GPS shorelines were generated by the U.S. Geological Survey using Ashtech Z-Xtreme DGPS units from various collection dates in 2017. Shorelines were collected by walking along the shoreline with a GPS receiver at roughly 1-meter intervals and taking measurements along the marsh scarp. GPS points were processed and turned into an ArcGIS shapefile. The points were converted into vector shorelines using XTools Pro (v.17) "polylines from points" tool. The location between each point was interpolated so the specific shoreline location between each point might not represent the actual shoreline position. To see the transect intersection locations, the ArcGIS editor toolbar can be used. Shorelines are not previously published and are available through this data release webpage (https://doi.org/10.5066/P9JMA8WK). Process_Date: 2018 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Joseph Terrano Contact_Position: Researcher III Contact_Address: Address_Type: mailing and physical Address: 600 4th Street South City: St.Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: 727-502-8047 Contact_Electronic_Mail_Address: jterrano@usgs.gov Process_Step: Process_Description: Shorelines were compiled from all available data sources as both previously published shorelines or ones created for this study. Reguardless of the data source, shorelines were edited in ArcGIS (version 10.5) so that only the desired shorelines were included in the final dataset. For example, historical shorelines derived from T-sheets included lines for map boundaries and features not designated as shorelines. These features were deleted. Once shorelines were edited and checked, all dated shorelines were merged into a single dataset. Attributes were edited to include information regarding the date and source of the original data. Compiled shorelines were processed using the AMBUR (Analyzing Moving Boundaries Using R) statistical package for R (version 3.4.3) tool to add required missing attributes. AMBUR performs shoreline change analysis on vector digital shorelines. All necessary attribute fields must be present in order to run various AMBUR functions; the following fields are required for boundaries: "Id", "DATE_", "ACCURACY", "SHORE_LOC", "CLASS_1", "CLASS_2", "CLASS_3", and "GROUP". In order to determine if all the required fields were present in the merged boundary datasets, an AMBUR sub-routine (ambur.check) was used to check all shoreline shapefiles for missing attribute fields. For more information about the AMBUR shoreline requirements see the AMBUR user manual at http://ambur.r-forge.r-project.org/user/ambur%20basic%20user%20guide%201_0a.pdf. After the AMBUR analysis was finished, extra fields ("SHORE_LOC", "CLASS_1", "CLASS_2", "CLASS_3", and "GROUP") were removed as they were not necessary. Process_Date: 2018 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Joseph Terrano Contact_Position: Researcher III Contact_Address: Address_Type: mailing and physical Address: 600 4th Street South City: St.Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: 727-502-8047 Contact_Electronic_Mail_Address: jterrano@usgs.gov Process_Step: Process_Description: Added keywords section with USGS persistent identifier as theme keyword. Process_Date: 20201013 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: VeeAnn A. Cross Contact_Position: Marine Geologist Contact_Address: Address_Type: Mailing and Physical Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2251 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov Spatial_Data_Organization_Information: 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: 16 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -87.0 Latitude_of_Projection_Origin: 0.0 False_Easting: 500000.0 False_Northing: 0.0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.6096 Ordinate_Resolution: 0.6096 Planar_Distance_Units: Meter Geodetic_Model: Horizontal_Datum_Name: D_North_American_1983 Ellipsoid_Name: GRS_1980 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257222101 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: Shorelines_1848_2017 Entity_Type_Definition: Table containing attribute information associated with the 1848 to 2017 Grand Bay MS/AL vectorized marsh shorelines. Entity_Type_Definition_Source: USGS Attribute: Attribute_Label: Date_ Attribute_Definition: Date imagery was collected for the Mississippi and Alabama coast using the "MM/DD/YYYY HH:MM:SS" format. Additional information can be found in the "Year" field. The HH:MM:SS was set at 3:00:00 PM for all shorelines as a general placeholder. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 01/01/1848 3:00:00PM Range_Domain_Maximum: 10/17/2017 3:00:00 PM Attribute: Attribute_Label: Year Attribute_Definition: 4-digit year in which the imagery was collected. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1848 Range_Domain_Maximum: 2017 Attribute_Units_of_Measure: Year Attribute: Attribute_Label: Accuracy Attribute_Definition: A value representing the shoreline position uncertainty associated with the imagery type, aerial imagery, which was used in the shoreline change statistical computations reported by Hapke and other (2011). See cross reference section of this metadata for more information. As stated above, several factors may influence the accuracy and uncertainty of shoreline position for vegetated shorelines, such as water level. Water level at the time of imagery collection is largely unknown for most historical imagery, therefore we cannot account for shoreline positional errors associated with water level. Published uncertainty estimates in Hapke and other (2011) are for sandy shorelines, but were used for (1942, 1975, 1986, 1992, 2004, 2006, and 2014). These values should be regarded as less conservative than errors that may account for uncertainty in digitization of vegetated shorelines from aerial imagery. The 2017 USGS GPS shoreline accuracy was calculated based on the average positional error of the GPS points for each line segment. The MOG and GBNERR GPS data was assigned a 5 meter uncertainty value based on reported values in the MOG source metadata. The 2010 and 2012 uncertainty values were computed as the square root of the sum of squares of the image resolution, image uncertainty, and the maximum digitization error of 1 meter. For additional information see the source metadata. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0054 Range_Domain_Maximum: 10.8 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Source Attribute_Definition: An identifier for the source of the vector shoreline data. Attribute_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: NOAA Enumerated_Domain_Value_Definition: NOAA digitized topographic sheet (t-sheet) shorelines. Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: MOG Enumerated_Domain_Value_Definition: Mississippi Office of Geology digitized shorelines. Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: GBNERR Enumerated_Domain_Value_Definition: Data from the Grand Bay National Estuarine Research Reserve. Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: USGS Enumerated_Domain_Value_Definition: Data digitized by the USGS Coastal and Marine Science Center- St.Petersburg, FL. Enumerated_Domain_Value_Definition_Source: USGS Attribute: Attribute_Label: Orig_Name Attribute_Definition: The original name of the downloaded file. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: A text string describing the name of the file as it was downloaded from the original source. Attribute: Attribute_Label: Download Attribute_Definition: The web link for the source of the original data. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: A text string describing the web address, if available at the time of publication. Attribute: Attribute_Label: Notes Attribute_Definition: Any data documentation notes. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: A text string describing the notation. Attribute: Attribute_Label: Id Attribute_Definition: Automatically generated number that ranges between 0 and 2251. Attribute_Definition_Source: AMBUR Attribute_Domain_Values: Unrepresentable_Domain: Sequential, unique whole numbers that are automatically generated by AMBUR. Attribute is required by AMBUR program. Attribute: Attribute_Label: SHAPE_Leng Attribute_Definition: System-generated attribute field, which was automatically created by ArcGIS to indicate the feature length. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0138841639081 Range_Domain_Maximum: 108319.648526 Attribute_Units_of_Measure: Meters Overview_Description: Entity_and_Attribute_Overview: The entity and attribute information provided here describes the tabular data associated with the dataset. Please review the detailed descriptions that are provided (the individual attribute descriptions) for information on the values that appear as fields/table entries of the dataset. Entity_and_Attribute_Detail_Citation: The entity and attribute information was generated by the individual and/or agency identified as the originator of the data-set. Please review the rest of the metadata record for additional details and information. For details on AMBUR fields and analysis requirements, see: Jackson, C.W., Jr., 2010. Basic User Guide for the AMBUR package for R, version 1.0a. http://ambur.r-forge.r-project.org/user/ambur%20basic%20user%20guide%201_0a.pdf. Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey St Petersburg Coastal and Marine Science Center Contact_Person: Joseph F. Terrano Contact_Position: Contractor Contact_Address: Address_Type: Mailing Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Contact_Voice_Telephone: 727-502-8047 Contact_Facsimile_Telephone: 727-502-8182 Contact_Electronic_Mail_Address: jterrano@usgs.gov Resource_Description: Shorelines_1848_2017.shp Distribution_Liability: This digital publication was prepared by an agency of the United States Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, nor shall the act of distribution imply any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ArcGIS Shapefile Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9JMA8WK/data/Shorelines_1848_2017.zip Fees: None. No fees are applicable for obtaining the data-set. Metadata_Reference_Information: Metadata_Date: 20201013 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey St Petersburg Coastal and Marine Science Center Contact_Person: Joseph F. Terrano Contact_Position: Contractor Contact_Address: Address_Type: Mailing Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Contact_Voice_Telephone: 727-502-8047 Contact_Facsimile_Telephone: 727-502-8182 Contact_Electronic_Mail_Address: jterrano@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time