Metadata:
  Identification_Information:
    Citation:
      Citation_Information:
        Originator: Alexander C. Seymour
        Originator: Kara S. Doran
        Publication_Date: 20260310
        Title: North Carolina Dune Condition Codes
        Edition: 1.0
        Geospatial_Data_Presentation_Form: vector digital data
        Larger_Work_Citation:
          Citation_Information:
            Originator: Alexander C. Seymour
            Originator: Kara S. Doran
            Publication_Date: 20260310
            Title: Coastal Dune Condition Codes and Time Series Features, North Carolina
            Series_Information:
              Series_Name: U.S. Geological Survey data release
              Issue_Identification: doi:10.5066/P9WYA19U
            Publication_Information:
              Publication_Place: St. Petersburg, FL
              Publisher: U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center
            Online_Linkage: https://doi.org/10.5066/P9WYA19U
    Description:
      Abstract: The U.S. Geological Survey (USGS) supports multiple efforts to understand and predict storm impacts to our nation’s coastlines. The geospatial dataset (vector feature class) and comma-delimited American Standard Code for Information Interchange (ASCII) table describes the changes in the elevation and cross-shore position of the modern foredune crest from September 1997 to October 2018 across the North Carolina ocean-fronted coastline, as well as infrastructure distance, beach width, and total water level (TWL) elevation information. Results are provided as points at an alongshore resolution of 500 meters (m) and describe the dune crest elevation (classified as ‘low’, ‘moderate’, or ‘high’), the dune crest elevation trend (classified as ‘eroding’, ‘no net change’, or ‘accreting’), and the dune crest migration trend (classified as ‘landward’, ‘no net change’, or ‘seaward’). The cross-shore distance between the dune crest and line of first infrastructure at the end of the study period, average beach width, and 98% quantile total water level elevation for the study period are also provided. Individual dune condition code positions (points) represent the center of an alongshore “bin” and describe coastal trends within 250 m alongshore on either side of the point. An ArcGIS Pro Map Package file is also included, which displays dune condition code and time series features with specific symbology and graphing schema that aid the user in interpreting and visualizing some of the most important attributes in the data. The methods used to generate this data followed the process outlined in “Decadal-scale characteristics of natural and anthropogenic dune morphology along North Carolina barrier islands (SE Atlantic coast)” by Seymour and others (2026).
      Purpose: To provide information on the changes in the elevation and position of coastal dunes over the last two decades, along with beach width, total water level, and first infrastructure line distance data along the North Carolina coast.
    Time_Period_of_Content:
      Time_Period_Information:
        Range_of_Dates/Times:
          Beginning_Date: 19970915
          Ending_Date: 20181002
      Currentness_Reference: ground condition
    Status:
      Progress: Complete
      Maintenance_and_Update_Frequency: None planned
    Spatial_Domain:
      Bounding_Coordinates:
        West_Bounding_Coordinate: -78.541634
        East_Bounding_Coordinate: -75.460637
        North_Bounding_Coordinate: 36.546124
        South_Bounding_Coordinate: 33.844975
    Keywords:
      Theme:
        Theme_Keyword_Thesaurus: USGS Metadata Identifier
        Theme_Keyword: USGS:ff278ec5-35ce-415b-b0ae-652d7f91c337
      Theme:
        Theme_Keyword_Thesaurus: ISO 19115 Topic Category
        Theme_Keyword: geoscientificInformation
        Theme_Keyword: oceans
        Theme_Keyword: environment
        Theme_Keyword: structure
      Theme:
        Theme_Keyword_Thesaurus: USGS Thesaurus
        Theme_Keyword: hazards
        Theme_Keyword: marine geology
        Theme_Keyword: ocean sciences
        Theme_Keyword: coastal processes
        Theme_Keyword: erosion
        Theme_Keyword: floods
        Theme_Keyword: geospatial datasets
        Theme_Keyword: time series datasets
      Theme:
        Theme_Keyword_Thesaurus: None
        Theme_Keyword: U.S. Geological Survey
        Theme_Keyword: USGS
        Theme_Keyword: St. Petersburg Coastal and Marine Science Center
        Theme_Keyword: SPCMSC
        Theme_Keyword: Coastal and Marine Hazards and Resources Program
        Theme_Keyword: CMHRP
      Place:
        Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
        Place_Keyword: North Carolina
        Place_Keyword: Atlantic Ocean
    Access_Constraints: None
    Use_Constraints: Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. The U.S. Geological Survey requests to be acknowledged as originators of the data in future products or derivative research.
    Point_of_Contact:
      Contact_Information:
        Contact_Organization_Primary:
          Contact_Organization: U.S. Geological Survey
          Contact_Person: Kara S. Doran
        Contact_Address:
          Address_Type: mailing and physical
          Address: 600 4th Street South
          City: Saint Petersburg
          State_or_Province: FL
          Postal_Code: 33701
          Country: United States
        Contact_Voice_Telephone: 727-502-8117
        Contact_Facsimile_Telephone: 727-502-8001
        Contact_Electronic_Mail_Address: kdoran@usgs.gov
    Native_Data_Set_Environment: Windows 10 Enterprise 21H2 (Build 19044.1826); Esri ArcGIS Pro 2.7.1
    Cross_Reference:
      Citation_Information:
        Originator: Alexander C. Seymour
        Originator: Daniel J. Ciarletta 
        Originator: Kara S. Doran
        Originator: Kai Parker
        Originator: Margaret L. Palmsten
        Publication_Date: 20260305
        Title: Decadal-scale characteristics of natural and anthropogenic dune morphology along North Carolina barrier islands (SE Atlantic coast)
        Series_Information:
          Series_Name: Journal of Coastal Research
          Issue_Identification: Unknown
        Online_Linkage: https://doi.org/10.2112/JCOASTRES-D-25-00053.1
  Data_Quality_Information:
    Logical_Consistency_Report: Uncertainty estimates were produced for all results.
    Completeness_Report: This dataset is considered complete for the information presented, as described in the abstract section. Users are advised to read the rest of the metadata record carefully for additional details.
    Positional_Accuracy:
      Horizontal_Positional_Accuracy:
        Horizontal_Positional_Accuracy_Report: Uncertainties for rates of dune crest cross-shore migration are described by 95% confidence intervals. Uncertainties for time series beach slope and beach width are described by 95% confidence intervals. Confidence intervals are standard diagnostic metrics produced by generalized linear regressions. For more information on how these regressions were calculated, see Seymour and others (2024). Horizontal positions were projected to the World Geodetic System of 1984 (WGS 84) Universal Transverse Mercator Zone 18 North (UTM 18N) coordinate system.
      Vertical_Positional_Accuracy: 
        Vertical_Positional_Accuracy_Report: Uncertainties for final modeled dune elevations, as well as final modeled Q98 TWL (98% quantile total water level) elevations, are described by 95% prediction intervals for positions that are statistically increasing or decreasing, and by 95% confidence intervals for positions that are no net elevation change. Uncertainties for rates of dune crest elevation change are described by 95% confidence intervals. Uncertainties for mean time series dune crest elevation and Q98 TWL elevation are described by 95% confidence intervals. Confidence and prediction intervals are standard diagnostic metrics produced by generalized linear regressions. For more information on how these regressions were calculated, see Seymour and others (2024). Vertical positions were referenced to the North American Vertical Datum of 1988 (NAVD88).
    Lineage:
      Process_Step:
        Process_Description: Methods for deriving spatial and time series data and attributes in this data release can be found in Seymour and others (2026). For final predicted dune crest elevations, if the dune crest was classified as increasing or decreasing in elevation across the time series, this value is the final dune crest elevation predicted by the regression at the end of the time series and the uncertainty is represented by the 95% prediction interval. If the dune crest was classified as no net change in elevation across the time series, this value is the mean dune crest elevation across the time series, and the uncertainty is represented by the 95% confidence interval for the time series mean. Final predicted dune crest cross-shore positions are not an independent attribute but were used during the calculation of the dune crest to infrastructure distance. For final predicted dune crest cross-shore positions, if the dune crest was classified as migrating seaward or landward across the time series, this value is the final dune crest position predicted by the regression at the end of the time series. If the dune crest was classified as no net change in position across the time series, this value is the mean dune crest position across the time series. For the final predicted 98% quantile total water level elevation, if 98% quantile total water level elevation was classified as increasing or decreasing across the time series, this value is the final elevation predicted by the time series regression, and the uncertainty is represented by the 95% prediction interval. If the 98% quantile total water level elevation was classified as no net change across the time series, this value is the mean 98% quantile total water level elevation across the time series, and the uncertainty is represented by the 95% confidence interval for the time series mean. In the above attributes, final predicted values and time series means were used because they correct for interannual dune elevation, position, and Q98 TWL variance better than the observed dune elevations from the latest survey year. See Seymour and others (2026) for more information. Additionally, after the dune condition code features were generated, an analyst manually removed select positions that occurred in inlets where the elevation of shoals was contributing datapoints to the time series. This sometimes occurs after the erosive loss of the subaerial beach and results in inaccurate dune elevation and migration change trends. Additional points were removed that were calculated from transects that diverged from shore-normal orientations. Specifically, this could occur most often directly on cape headlands, or on spits adjoined to cape headlands.
        Process_Date: 20221013
        Source_Produced_Citation_Abbreviation: NC_Dune_Condition_Codes_GDB
        Process_Contact: 
          Contact_Information:
            Contact_Person_Primary:
                Contact_Person: Alexander C. Seymour
                Contact_Organization: U.S. Geological Survey
            Contact_Position: Physical Scientist
            Contact_Address:
              Address_Type: mailing and physical
              Address: 600 4th Street South
              City: Saint Petersburg
              State_or_Province: FL
              Postal_Code: 33701
              Country: United States
            Contact_Voice_Telephone: 727-502-8122
            Contact_Facsimile_Telephone: 727-502-8001
            Contact_Electronic_Mail_Address: aseymour@usgs.gov
      Process_Step:
        Process_Description: The data included in this release is a point feature class of the dune condition codes stored in a file geodatabase (.gdb), along with a comma-delimited ASCII table (.csv) for users that do not have the ability to open and view Geographic Information Systems (GIS) file formats. The dune condition code ASCII table was generated by inputting the geodatabase feature class into the ‘Feature Class to ASCII’ ArcGIS Pro geoprocessing tool. 
        Source_Used_Citation_Abbreviation: NC_Dune_Condition_Codes_GDB        
        Process_Date: 20221013
        Source_Produced_Citation_Abbreviation: NC_Dune_Condition_Codes_ASCII
        Process_Contact: 
          Contact_Information:
            Contact_Person_Primary:
                Contact_Person: Alexander C. Seymour
                Contact_Organization: U.S. Geological Survey
            Contact_Position: Physical Scientist
            Contact_Address:
              Address_Type: mailing and physical
              Address: 600 4th Street South
              City: Saint Petersburg
              State_or_Province: FL
              Postal_Code: 33701
              Country: United States
            Contact_Voice_Telephone: 727-502-8122
            Contact_Facsimile_Telephone: 727-502-8001
            Contact_Electronic_Mail_Address: aseymour@usgs.gov
      Process_Step:
        Process_Description: To include additional visualizations of the feature class data, an ArcGIS Pro Map Package (.mpkx) was generated, which contains specific symbolization of the feature classes and charts that aid the user in interpreting and visualizing some of the most important attributes in the data. The geodatabase feature classes, both the dune condition code described in this metadata record (NC_Dune_Condition_Codes_GDB), and time series features (NC_Time_Series_Features_GDB, described in NC_Time_Series_Features_Metadata) were added to a new ArcGIS Pro map. Map symbology was established by setting the symbology type to Unique Values and selecting the ‘Elevation Condition’, ‘Elevation Trend’, and ‘Migration Trend’ fields, and classifying/coloring those symbol classes. The rational for the symbol types and colors are described in Seymour and Others (2024). Scatterplots displaying interannual dune elevation and cross shore position change were created by selecting the time series features and clicking on the scatter plot option under the Create Charts button within the Data toolbar tab. The ‘Survey Year’ field was chosen as the x-axis and the ‘Mean Dune Elevation’ or ‘Mean Dune Position’ was chosen as the y-axis. Bar charts displaying the frequency of dune condition codes were created by selecting the dune condition code features and clicking on the Bar Chart option under the Create Charts button within the Data toolbar tab. The ‘Condition Code’ field was chosen as the category variable and the Count option was chosen for aggregation. The Hybrid Reference Layer and World Imagery basemaps were also added to the map layout. For more information about these basemaps, refer to: Hybrid Reference Layer (https://www.arcgis.com/home/item.html?id=30d6b8271e1849cd9c3042060001f425) and World Imagery (https://services.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer). The map and its associated schema were then exported to a Map Package by clicking the ‘New Map Package’ command in the ‘Share’ tab in ArcGIS Pro.
        Source_Used_Citation_Abbreviation: NC_Dune_Condition_Codes_Time_Series.gdb
        Source_Used_Citation_Abbreviation: NC_Dune_Condition_Codes_GDB
        Source_Used_Citation_Abbreviation: NC_Time_Series_Features_GDB
        Process_Date: 20221013
        Source_Produced_Citation_Abbreviation: NC_Dune_Condition_Codes_Time_Series_Map_Pack.mpkx
        Source_Produced_Citation_Abbreviation: NC_Dune_Condition_Codes_Time_Series.zip
        Process_Contact: 
          Contact_Information:
            Contact_Person_Primary:
                Contact_Person: Alexander C. Seymour
                Contact_Organization: U.S. Geological Survey
            Contact_Position: Physical Scientist
            Contact_Address:
              Address_Type: mailing and physical
              Address: 600 4th Street South
              City: Saint Petersburg
              State_or_Province: FL
              Postal_Code: 33701
              Country: United States
            Contact_Voice_Telephone: 727-502-8122
            Contact_Facsimile_Telephone: 727-502-8001
            Contact_Electronic_Mail_Address: aseymour@usgs.gov
  Spatial_Data_Organization_Information:
    Direct_Spatial_Reference_Method: Point
    Point_and_Vector_Object_Information:
      SDTS_Terms_Description:
        SDTS_Point_and_Vector_Object_Type: Point
        Point_and_Vector_Object_Count: 987
  Spatial_Reference_Information:
    Horizontal_Coordinate_System_Definition:
      Planar:
        Grid_Coordinate_System:
          Grid_Coordinate_System_Name: Universal Transverse Mercator
          Universal_Transverse_Mercator:
            UTM_Zone_Number: 18N
            Transverse_Mercator:
              Scale_Factor_at_Central_Meridian: 0.9996
              Longitude_of_Central_Meridian: -75.0
              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: 0.001
            Ordinate_Resolution: 0.001
          Planar_Distance_Units: meters
      Geodetic_Model:
        Horizontal_Datum_Name: WGS 1984
        Ellipsoid_Name: WGS 1984
        Semi-major_Axis: 6378137.0
        Denominator_of_Flattening_Ratio: 298.257223563
    Vertical_Coordinate_System_Definition: 
      Altitude_System_Definition: 
        Altitude_Datum_Name: North American Vertical Datum 1988
        Altitude_Resolution: 0.01
        Altitude_Distance_Units: meters
        Altitude_Encoding_Method: Attribute values
  Entity_and_Attribute_Information:
    Detailed_Description:
      Entity_Type:
        Entity_Type_Label: NC_Dune_Condition_Codes_GDB.gdb, NC_Dune_Condition_Codes_ASCII.csv
        Entity_Type_Definition: File geodatabase feature class (.gdb) and comma-separated values file (.csv) of the dune condition codes for North Carolina.
        Entity_Type_Definition_Source: USGS
      Attribute:
        Attribute_Label: OBJECTID
        Attribute_Definition: Internal feature number.
        Attribute_Definition_Source: Esri
        Attribute_Domain_Values:
          Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated.
      Attribute:
        Attribute_Label: Shape
        Attribute_Definition: Feature geometry. This attribute is only present in the feature class dataset.
        Attribute_Definition_Source: Esri
        Attribute_Domain_Values:
          Unrepresentable_Domain: Vector type (Point M).
      Attribute:
        Attribute_Label: AlongshoreID
        Attribute_Definition: Unique ID for the alongshore bin.
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 1
            Range_Domain_Maximum: 1033
      Attribute:
        Attribute_Label: ConditionCode
        Attribute_Definition: A three-digit code describing the dune height class, dune elevation trend, and dune position trend. 
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Unrepresentable_Domain: The first digit describes the dune crest height class (1 = low, 2 = moderate, 3 = high), the second digit describes the dune crest elevation trend (1 = eroding, 2 = no net change, 3 = accreting), and the third digit describes the dune crest position trend (1 = transgressing, 2 = no net change, 3 = prograding).
      Attribute:
        Attribute_Label: ElevationCondition
        Attribute_Definition: A string describing the dune crest elevation condition class.
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Low
            Enumerated_Domain_Value_Definition: Dune crests that have a low time series mean elevation (less than 3.82 m).
            Enumerated_Domain_Value_Definition_Source: USGS
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Moderate
            Enumerated_Domain_Value_Definition: Dune crests that have a moderate time series mean elevation (3.82 – 5.65 m).
            Enumerated_Domain_Value_Definition_Source: USGS
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: High
            Enumerated_Domain_Value_Definition: Dunes crests that have a high time series mean elevation (greater than 5.65 m).
            Enumerated_Domain_Value_Definition_Source: USGS
      Attribute:
        Attribute_Label: MeanDuneElevation
        Attribute_Definition: Spatiotemporal average dune crest elevation within each alongshore bin and across the entire time series, in meters NAVD88.
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 1.380703
            Range_Domain_Maximum: 9.745357
      Attribute:
        Attribute_Label: MeanDuneElevationUncertainty
        Attribute_Definition: 95% confidence interval describing the time series mean dune crest elevation uncertainty, in meters.
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 0.055937
            Range_Domain_Maximum: 2.070284
      Attribute:
        Attribute_Label: DuneElevationSTD
        Attribute_Definition: Standard deviation of the bin-averaged dune crest elevation across the entire time series, in meters.
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 0.076808
            Range_Domain_Maximum: 1.972759
      Attribute:
        Attribute_Label: DuneElevationTrend
        Attribute_Definition: A string describing the dune crest elevation trend.
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Eroding
            Enumerated_Domain_Value_Definition: Dune crests that are decreasing in elevation across the time series.
            Enumerated_Domain_Value_Definition_Source: USGS
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: No net change
            Enumerated_Domain_Value_Definition: Dune crests that are no net change in elevation across the time series.
            Enumerated_Domain_Value_Definition_Source: USGS
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Accreting
            Enumerated_Domain_Value_Definition: Dune crests that are increasing in elevation across the time series.
            Enumerated_Domain_Value_Definition_Source: USGS
      Attribute:
        Attribute_Label: DuneElevationChangeRate
        Attribute_Definition: Estimated bin-averaged dune crest elevation change rate across the time series, in meters/year. If the rate was not statistically significant, the rate was recorded as zero.
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: -0.184645
            Range_Domain_Maximum: 0.163274
      Attribute:
        Attribute_Label: DuneElevationChangeRateUnfilt
        Attribute_Definition: Estimated bin-averaged dune crest elevation change rate across the time series, in meters/year. Rates were unfiltered and not set to zero when not statistically significant. This attribute was included specifically to compare with the dune elevation change rate uncertainty, because rate uncertainties cannot be accurately applied to rates set to zero. 
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: -0.184645
            Range_Domain_Maximum: 0.163274
      Attribute:
        Attribute_Label: DuneElevationChangeRateUncert
        Attribute_Definition: One-tailed 95% confidence interval describing the dune crest elevation change rate uncertainty, in meters/year.
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 0.003921
            Range_Domain_Maximum: 0.314643
      Attribute:
        Attribute_Label: MigrationTrend
        Attribute_Definition: A string describing the dune crest migration trend.
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Landward
            Enumerated_Domain_Value_Definition: Dune crests that are migrating landward across the time series (transgressing).
            Enumerated_Domain_Value_Definition_Source: USGS
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: No net change
            Enumerated_Domain_Value_Definition: Dune crests that are no net change in position across the time series.
            Enumerated_Domain_Value_Definition_Source: USGS
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Seaward
            Enumerated_Domain_Value_Definition: Dune crests that are migrating seaward across the time series (prograding).
            Enumerated_Domain_Value_Definition_Source: USGS
      Attribute:
        Attribute_Label: DuneMigrationRate
        Attribute_Definition: Cross-shore migration rate of bin-averaged dune crest positions across the time series, in meters/year. Negative rates indicate landward migration, and positive rates indicate seaward migration. If the rate was not statistically significant, the rate was recorded as zero.
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: -30.384809
            Range_Domain_Maximum: 19.207479
      Attribute:
        Attribute_Label: DuneMigrationRateUnfiltered
        Attribute_Definition: Cross-shore migration rate of bin-averaged dune crest positions across the time series, in meters/year. Rates were unfiltered and not set to zero when not statistically significant. This attribute was included specifically to compare with the dune migration rate uncertainty, because rate uncertainties cannot be accurately applied to rates set to zero. Negative rates indicate landward migration, and positive rates indicate seaward migration.
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: -30.384809
            Range_Domain_Maximum: 19.207479
      Attribute:
        Attribute_Label: DuneMigrationRateUncertainty
        Attribute_Definition: 95% percent confidence interval for the dune crest migration change rate, in meters/year.
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 0.035645
            Range_Domain_Maximum: 24.040369
      Attribute:
        Attribute_Label: DunePositionSTD
        Attribute_Definition: Standard deviation of the bin-averaged dune crest cross-shore position across the time series, in meters.
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 0.349312
            Range_Domain_Maximum: 262.262146
      Attribute:
        Attribute_Label: MeanBeachWidth
        Attribute_Definition: Mean bin-averaged beach width across the time series, in meters. Beach width was defined as the cross-shore planar distance between the mean high water shoreline and the dune toe.
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 20.517197
            Range_Domain_Maximum: 259.278687
      Attribute:
        Attribute_Label: MeanBeachWidthUncertainty
        Attribute_Definition: 95% confidence interval describing the time series mean beach width uncertainty, in meters.
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 1.837929
            Range_Domain_Maximum: 221.239273
      Attribute:
        Attribute_Label: MeanBeachSlope
        Attribute_Definition: Mean bin-averaged beach slope across the time series, in angular degrees. Beach slope was measured using the mean high water and dune toe position.
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 0.770043
            Range_Domain_Maximum: 7.148379
      Attribute:
        Attribute_Label: MeanBeachSlopeUncertainty
        Attribute_Definition: 95% confidence interval describing the time series mean beach slope uncertainty, in angular degrees.
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 0.112394
            Range_Domain_Maximum: 5.998414
      Attribute:
        Attribute_Label: MeanDistDuneToInfrastructure
        Attribute_Definition: The mean cross-shore distance between the final predicted dune crest position at the end of the time series and the bin-averaged position of the line of first infrastructure, in meters. Negative values indicate that the line of first infrastructure is seaward of the dune crest. Null values indicate that there was no infrastructure within 500 m of the shoreline.
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: -55.180721
            Range_Domain_Maximum: 435.653908
      Attribute:
        Attribute_Label: MedianDistDuneToInfrastructur
        Attribute_Definition: The median cross-shore distance between the final predicted dune crest position and the bin-averaged position of the line of first infrastructure, in meters. Negative values indicate that the line of first infrastructure is seaward of the dune crest. Null values indicate that there was no infrastructure within 500 m of the shoreline.
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: -57.157335
            Range_Domain_Maximum: 471.220059
      Attribute:
        Attribute_Label: STDDuneToInfrastructure
        Attribute_Definition: The standard deviation of the cross-shore distance between the final predicted dune crest position and the bin-averaged line of first infrastructure position, in meters. Null values indicate that there was no infrastructure within 500 m of the shoreline.
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 0.683446
            Range_Domain_Maximum: 205.610771
      Attribute:
        Attribute_Label: FinalPredictedDuneElevation
        Attribute_Definition: Predicted dune crest elevation at the end of the time series, in meters NAVD88. This is represented by either a regression prediction or a time series mean. Final predicted values and time series means were used because they correct for interannual dune elevation variance better than the observed dune elevations from the latest survey year. See Seymour and others (2024) for more information.
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 1.076
            Range_Domain_Maximum: 10.222
      Attribute:
        Attribute_Label: FinalPredictedDuneElevUncerta
        Attribute_Definition: Uncertainty for the final predicted dune elevation. This is represented by either a prediction interval or a confidence interval. See the Vertical_Positional_Accuracy_Report section of this metadata for more information.
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 0.051
            Range_Domain_Maximum: 3.184
      Attribute:
        Attribute_Label: TWLQ98MeanElevation
        Attribute_Definition: The temporal mean of the 98% quantile total water level elevation across the time series, in meters NAVD88. Null values represent bins where no total water level information existed within 1 km of the bin. This condition existed for only one of the 987 bins.
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 1.587
            Range_Domain_Maximum: 3.732
      Attribute:
        Attribute_Label: TWLQ98MeanElevationUncertaint
        Attribute_Definition: 95% confidence interval describing uncertainty of the 98% quantile total water level elevation mean, in meters. Null values represent bins where no total water level information existed within 1 km of the bin. This condition existed for only one of the 987 bins.
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 0.042
            Range_Domain_Maximum: 0.119
      Attribute:
        Attribute_Label: TWLQ98FinalElevationPredictio
        Attribute_Definition: Predicted 98% quantile total water level elevation at the end of the TWL time series (12/31/2018), in meters NAVD88. This is represented by either a regression prediction or a time series mean. See the Vertical_Positional_Accuracy_Report section of this metadata for more information. Null values represent bins where no total water level information existed within 1 km of the bin. This condition existed for only one of the 987 bins.
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 1.587
            Range_Domain_Maximum: 4.024
      Attribute:
        Attribute_Label: TWLQ98FinalElevationUncertain
        Attribute_Definition: Uncertainty for the final predicted 98% quantile total water level elevation, in meters. This is represented by either a prediction interval or a confidence interval. See the Vertical_Positional_Accuracy_Report in this metadata for more information. Null values represent bins where no total water level information existed within 1 km of the bin. This condition existed for only one of the 987 bins.
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 0.046
            Range_Domain_Maximum: 1.243
      Attribute:
        Attribute_Label: ElevDiff_FinDuneElevAndTWLQ98
        Attribute_Definition: The vertical difference between the final predicted dune crest elevation at the end of the time series and the final predicted 98% quantile total water level elevation, in meters. Negative values indicate that the final predicted 98% quantile total water level elevation was higher than the final predicted dune crest elevation. Null values represent bins where no total water level information existed within 1 km of the bin. This condition existed for only one of the 987 bins.
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: -1.571
            Range_Domain_Maximum: 7.444
      Attribute:
        Attribute_Label: SurveyRange
        Attribute_Definition: String recording the date of the first and last survey of the time series with valid dune crest data at this location.
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Unrepresentable_Domain: The month, day, and year (MM/DD/YYYY) of the first and last survey in the time series, separated by a hyphen.
      Attribute:
        Attribute_Label: XCoord
        Attribute_Definition: Easting (x) coordinate (WGS 84 UTM 18N).
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 172289.1866
            Range_Domain_Maximum: 458262.4674
      Attribute:
        Attribute_Label: YCoord
        Attribute_Definition: Northing (y) coordinate (WGS 84 UTM 18N). 
        Attribute_Definition_Source: USGS
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 3748925.4136
            Range_Domain_Maximum: 4044873.0271
    Overview_Description:
      Entity_and_Attribute_Overview: NC_Dune_Condition_Codes_Time_Series_Map_Pack.mpkx: ArcGIS Pro Map Package containing the dune condition codes (NC_Dune_Condition_Codes) and time series features (NC_Time_Series_Features) feature classes, stored inside a file geodatabase (NC_Dune_Condition_Codes_Time_Series.gdb). The Map Package also contains the Hybrid Reference Layer and World Imagery basemaps published by Esri in the Living Atlas. These basemaps are accessible via ArcGIS Online: Hybrid Reference Layer (https://www.arcgis.com/home/item.html?id=30d6b8271e1849cd9c3042060001f425) and World Imagery (https://services.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer). Scatterplots in the map pack are designed to only display plots from singular condition code points selected by the user. The user must bandbox select a desired condition code point with the Select interactive tool for a scatterplot to display data.
      Entity_and_Attribute_Detail_Citation: The entity and attribute information were generated by the individual and/or agency identified originator of the dataset. Please review the metadata records associated with this data release for additional details and information.
  Distribution_Information:
    Distributor:
      Contact_Information:
        Contact_Organization_Primary:
          Contact_Organization: U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center
          Contact_Person: USGS SPCMSC Data Management
        Contact_Address:
          Address_Type: mailing and physical
          Address: 600 4th Street South
          City: Saint Petersburg
          State_or_Province: FL
          Postal_Code: 33701
          Country: United States
        Contact_Voice_Telephone: 727-502-8000
        Contact_Electronic_Mail_Address: gs-g-spcmsc_data_inquiries@usgs.gov
    Resource_Description: NC_Dune_Condition_Codes_GDB.gdb, NC_Dune_Condition_Codes_ASCII.csv, NC_Dune_Condition_Codes_Time_Series_Map_Pack.mpkx
    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: comma-delimited text, file geodatabase (Esri), ArcGIS Pro Map Package
          Format_Version_Number: ArcGIS Pro 3.0.3
          File_Decompression_Technique: The data download file is compressed and must be unzipped using software such as WinZip, 7Zip, etc. before use.
        Digital_Transfer_Option:
          Online_Option:
            Computer_Contact_Information:
              Network_Address:
                Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9WYA19U/data/NC_Dune_Condition_Codes_Time_Series.zip
      Fees: None
    Technical_Prerequisites: The geodatabase feature class and ArcGIS Map Package were created for the use within Esri ArcGIS Pro software (3.0.3 or newer). The ASCII table data were created for the use within Microsoft Excel, or similar text viewers, such as Notepad.
  Metadata_Reference_Information:
    Metadata_Date: 20260310
    Metadata_Contact:
      Contact_Information:
        Contact_Organization_Primary:
          Contact_Organization: U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center
          Contact_Person: USGS SPCMSC Data Management
        Contact_Address:
          Address_Type: mailing and physical
          Address: 600 4th Street South
          City: Saint Petersburg
          State_or_Province: FL
          Postal_Code: 33701
          Country: United States
        Contact_Voice_Telephone: 727-502-8000
        Contact_Electronic_Mail_Address: gs-g-spcmsc_data_inquiries@usgs.gov
    Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
    Metadata_Standard_Version: FGDC-STD-001-1998
    Metadata_Time_Convention: local time