DCpts, DTpts, SLpts: Dune crest, dune toe, and mean high water shoreline positions: Smith Island, VA, 2014

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Emily J. Sturdivant
Originator: Sara L. Zeigler
Originator: Benjamin T. Gutierrez
Originator: Kathryn M. Weber
Publication_Date: 20191220
Title:
DCpts, DTpts, SLpts: Dune crest, dune toe, and mean high water shoreline positions: Smith Island, VA, 2014
Edition: 1.0
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/P9V7F6UX
Publication_Information:
Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA
Publisher:
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program
Online_Linkage: https://doi.org/10.5066/P9V7F6UX
Online_Linkage: Larger_Work_Citation:
Citation_Information:
Originator: Emily J. Sturdivant
Originator: Sara L. Zeigler
Originator: Benjamin T. Gutierrez
Originator: Kathryn M. Weber
Publication_Date: 2019
Title:
Barrier island geomorphology and shorebird habitat metrics: Sixteen sites on the U.S. Atlantic Coast, 2013–2014
Edition: 1.0
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/P9V7F6UX
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Other_Citation_Details:
Suggested citation: Sturdivant, E.J., Zeigler, S.L., Gutierrez, B.T., and Weber, K.M., 2019, Barrier island geomorphology and shorebird habitat metrics—Sixteen sites on the U.S. Atlantic Coast, 2013–2014: U.S. Geological Survey data release, https://doi.org/10.5066/P9V7F6UX.
Online_Linkage: https://doi.org/10.5066/P9V7F6UX
Online_Linkage:
Description:
Abstract:
Understanding how sea-level rise will affect coastal landforms and the species and habitats they support is critical for crafting approaches that balance the needs of humans and native species. Given this increasing need to forecast sea-level rise effects on barrier islands in the near and long terms, we are developing Bayesian networks to evaluate and to forecast the cascading effects of sea-level rise on shoreline change, barrier island state, and piping plover habitat availability. We use publicly available data products, such as lidar, orthophotography, and geomorphic feature sets derived from those, to extract metrics of barrier island characteristics at consistent sampling distances. The metrics are then incorporated into predictive models and the training data used to parameterize those models. This data release contains the extracted metrics of barrier island geomorphology and spatial data layers of habitat characteristics that are input to Bayesian networks for piping plover habitat availability and barrier island geomorphology. These datasets and models are being developed for sites along the northeastern coast of the United States. This work is one component of a larger research and management program that seeks to understand and sustain the ecological value, ecosystem services, and habitat suitability of beaches in the face of storm impacts, climate change, and sea-level rise.
Purpose:
These datasets measure positions of geomorphic features, specifically dune crests, dune toes, and mean high water (MHW) shoreline pertaining to sandy beaches at Smith Island, VA in 2014. They can be used to calculate beach width and height. The source data were created for the purpose of modeling coastal hazards related to dune overtopping.
Supplemental_Information:
Another version of these datasets is available at https://doi.org/10.5066/f7gf0s0z (Doran and others, 2017). The data were made available to this project prior to being released by Doran and others (2017). Slight differences between the two versions may be caused by data clean-up that was performed by this project in some cases.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20140108
Ending_Date: 20140727
Currentness_Reference: Ground condition measured by source lidar data.
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -75.92402568
East_Bounding_Coordinate: -75.83143243
North_Bounding_Coordinate: 37.18093091
South_Bounding_Coordinate: 37.1108064
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:5daa37fce4b09fd3b0c9cf10
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: geoscientificInformation
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Barrier Island
Theme_Keyword: USGS
Theme_Keyword: CMHRP
Theme_Keyword: Geographic Information Systems
Theme_Keyword: GIS
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: Coastal and Marine Hazards and Resources Program
Theme_Keyword: Woods Hole Coastal and Marine Science Center
Theme_Keyword: St. Petersburg Coastal and Marine Science Center
Theme_Keyword: MHW
Theme_Keyword: Mean High Water
Theme_Keyword: Coastal Hazards
Theme_Keyword: Smith Island
Theme_Keyword: Virginia Coast Reserve
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: geospatial datasets
Theme_Keyword: geospatial analysis
Theme_Keyword: geomorphology
Theme_Keyword: transect sampling
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Virginia
Place_Keyword: VA
Place_Keyword: Delmarva Peninsula
Place_Keyword: Smith Island
Place_Keyword: Virginia Coast Reserve
Place_Keyword: North America
Place_Keyword: United States
Place_Keyword: USA
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. Please recognize the U.S. Geological Survey (USGS) as the source of this information.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Sara L. Zeigler
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: Mailing and Physical
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543
Country: United States
Contact_Voice_Telephone: 508-548-8700 x2290
Contact_Electronic_Mail_Address: szeigler@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name: Browse_Graphic_File_Description:
Example geomorphology points (mean high water shoreline, dune toe, and dune crest) overlain on the DEM. This example is for Assateague Island, MD and may not represent this dataset.
Browse_Graphic_File_Type: PNG
Cross_Reference:
Citation_Information:
Originator: Sara L. Zeigler
Originator: Emily J. Sturdivant
Originator: Benjamin T. Gutierrez
Publication_Date: 2019
Title:
Evaluating barrier island characteristics and piping plover (Charadrius melodus) habitat availability along the U.S. Atlantic coast—Geospatial approaches and methodology
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2019–1071
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Other_Citation_Details:
Details the methods used to process these data for use in barrier island and piping plover habitat modeling.
Online_Linkage: https://doi.org/10.3133/ofr20191071
Cross_Reference:
Citation_Information:
Originator: Emily J. Sturdivant
Publication_Date: 2019
Title: bi-transect-extractor
Edition: 1.0
Series_Information:
Series_Name: software release
Issue_Identification: DOI:10.5066/P915UYMY
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Other_Citation_Details:
Custom-built package used for data processing. The Jupyter notebook file distributed with these data were part of the processing to create these data. The notebook relies on this software package.
Online_Linkage: https://doi.org/10.5066/P915UYMY
Online_Linkage: https://code.usgs.gov/cmgp/bi-transect-extractor
Cross_Reference:
Citation_Information:
Originator: Kathryn M. Weber
Originator: Jeffrey H. List
Originator: Karen L. M. Morgan
Publication_Date: 2005
Title:
An Operational Mean High Water Datum for Determination of Shoreline Position from Topographic Lidar Data
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2005-1027
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Other_Citation_Details:
Provides regional mean high water elevation used to determine shoreline position.
Online_Linkage: https://pubs.usgs.gov/of/2005/1027/
Cross_Reference:
Citation_Information:
Originator: Kara J. Doran
Originator: Joseph W. Long
Originator: Justin J Birchler
Originator: Owen T. Brenner
Originator: Matthew W. Hardy
Originator: Karen L. M. Morgan
Originator: Hilary F. Stockdon
Originator: Miguel L. Torres
Publication_Date: 2017
Title:
Lidar-derived Beach Morphology (Dune Crest, Dune Toe, and Shoreline) for U.S. Sandy Coastlines
Geospatial_Data_Presentation_Form: tabular digital data
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Other_Citation_Details:
Affiliated datasets created using the same methods. A version of this geomorphology points dataset is available as 14CNT01_morphology.zip. These data were made available to us prior to publication and as a result, processing steps may differ from what is described here.
Online_Linkage: https://doi.org/10.5066/F7GF0S0Z
Cross_Reference:
Citation_Information:
Originator: Hilary F. Stockdon
Originator: Kara J. Doran
Originator: D. M. Thompson
Originator: K. L. Sopkin
Originator: Nathaniel G. Plant
Originator: Asbury H. Sallenger
Publication_Date: 2012
Title:
National assessment of hurricane-induced coastal erosion hazards: Gulf of Mexico
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2012–1084
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Other_Citation_Details: Provides the methods for feature extraction (pp. 17–23).
Online_Linkage: https://pubs.usgs.gov/of/2012/1084/
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Horizontal and vertical accuracy were estimated and recorded automatically during processing (see sections Positional Accuracy and Entity and Attribute Information). All output feature positions were manually verified against external aerial imagery and elevation data; positions deemed incorrect were manually deleted or relocated.
Logical_Consistency_Report:
This dataset consists of three point shapefile datasets produced from elevation data and tidal datum values through an automated process described below. It was not explicitly checked for topological consistency, but feature locations were verified by displaying them with aerial imagery and digital elevation models. Incorrect feature positions were manually deleted or relocated. Alongshore gaps of feature positions exist where the feature could not be accurately located along the profile. Additionally, shoreline points were removed where groups of three or fewer consecutive points were separated from the shoreline trend in the surrounding areas.
Dune crest positions may indicate the peak of the berm rather than a dune crest. Dune toe position is only determined for a given profile if certain criteria are met (see first process step for details). The shoreline elevation is considered the elevation of mean high water (MHW) as documented by Weber and others (2005).
Completeness_Report:
These data include dune crest positions and elevations (smi14_DCpts.shp), dune toe positions and elevations (smi14_DTpts.shp), and MHW shoreline positions (smi14_SLpts.shp). Processing attempted to locate positions every 10 m alongshore, but alongshore gaps greater than 10 m exist where features could not be accurately located along the cross-shore processing profile. Dune toe position is only determined for a given profile if certain criteria are met (see first process step for details). During post-processing, shoreline points were removed where groups of three or fewer consecutive points were separated from the shoreline trend in the surrounding areas.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Horizontal accuracy is dependent on the lidar point uncertainty and the density of and scatter in the lidar data points. For the shoreline points (smi14_SLpts.shp) cross-shore positional accuracy is estimated by calculating the 95% confidence interval of the linear regression of the shoreline position. It is reported in the field 'ci95_slx'.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Vertical accuracy is determined for each dune crest (smi14_DCpts.shp) feature and dune toe (smi14_DTpts.shp) feature based upon the scatter of data in the lidar grid cell. It is reported in the field 'z_error'.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator:
Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Geodetic Survey (NGS), Remote Sensing Division
Publication_Date: 20170320
Title:
2014 NOAA Post Hurricane Sandy Topobathymetric LiDAR Mapping for Shoreline Mapping
Online_Linkage: https://coast.noaa.gov/htdata/lidar1_z/geoid12b/data/4800
Type_of_Source_Media: digital data
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20140108
Ending_Date: 20140727
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: Lidar point cloud
Source_Contribution:
Lidar survey that was used to estimate dune morphology variables.
Process_Step:
Process_Description:
A customized MATLAB routine was used to extract beach and dune morphology. The routine determines the position of the mean high water (MHW) shoreline and the position and elevation of dune toe and dune crest. The routine is summarized below. Refer to Stockdon and others (2012) for details and figures. A version of these data was released in Doran and others (2017).
Processing was performed in MATLAB version 2017a. Source lidar point clouds were adjusted to NAVD88 through a MHW-offset correction factor. The NAVD88 elevation of MHW is 0.34 m for the region encompassing Smith Island (Weber and others, 2005).
First, lidar point cloud data are interpolated to 10 m (alongshore) by 2.5 m (cross-shore) grids oriented parallel to a roughly shore-parallel reference line that is used for all such feature extractions (Doran and others, 2017). Interpolation uses a Hanning window that is twice as wide as the grid resolution to minimize noise. Automated routines then identify the position of the three features (dune crest, shoreline, and dune toe) for each elevation profile. Each step is performed by a separate MATLAB program.
To determine the dune crest position, the algorithm selects the peak of the most seaward sand dune. It does so by classifying inflection points in cross-shore slope as morphologic crests and troughs and identifying the highest crest elevation as the primary dune. In the absence of a dune, the beach berm was extracted. The selection is limited to areas within 200 m of the shoreline, seaward of built structures, less than 0.5 m vertical error, and higher than the MHW elevation.
For each profile, the position of the MHW shoreline is determined. The cross-shore location of the MHW shoreline is automatically extracted with the incorporation of the RMS error surface. The probability that a grid cell elevation value is equal to MHW elevation is estimated from a normal distribution of beach elevation. The grid cell with the highest probability within a defined distance of a prior shoreline is selected as the most likely shoreline. A more precise location of MHW is interpolated from a linear regression of the selected point and adjacent grid cells. A confidence interval for the estimate is defined from the regression error.
Once the dune crest position is established, the dune toe position is determined. First, if the dune crest position is understood to represent a beach berm because the elevation is less than the high water line (HWL), dune toe position is not determined for the given profile. In the remainder of cases, dune toe is identified as the point of maximum slope change between the shoreline and the dune crest unless the elevation of that point is within 0.5 m of the dune crest elevation or the curvature of the profile around the dune toe was negative.
The feature positions resulting from the automated routine are manually verified by overlaying the horizontal positions on high-resolution coastal imagery. Profiles with identified inconsistencies are viewed in a customized MATLAB Graphical User Interface (GUI) that displays the features with the lidar data (interpolated and point cloud) and allows the operator to relocate or delete feature positions. High density of built structures and complex topography often cause errors in the feature positions that require manual editing.
The positions are exported from Matlab with geographic coordinate values (WGS84) in a table of comma-separated values and converted to an Esri shapefile in NAD83 UTM Zone 18N (Make XY Event Layer tool in ArcGIS 10.5). Coordinates were transformed from WGS84 to NAD83 using the transformation WGS_1984_(ITRF00)_To_NAD_1983 (WKID: 108190, accuracy: 0.1 m).
Source_Used_Citation_Abbreviation: Lidar point cloud
Process_Date: 2017
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Kara Doran
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing address
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: United States
Contact_Voice_Telephone: 727-502-8117
Contact_Facsimile_Telephone: 727-502-8182
Contact_Electronic_Mail_Address: kdoran@usgs.gov
Process_Step:
Process_Description:
Positions were converted from a table of comma-separated values to a shapefile using the function functions_warcpy.MorphologyCSV_to_FCsByFeature in the python package bi-transect-extractor (Sturdivant, 2019; version 1.0).
The dune crest, dune toe, and shoreline positions were overlaid on the DEM in ArcGIS 10.5 to check for incongruences between the morphology points and the elevation. Features that displayed logical inconsistency relative to the other features were flagged. For example, dune toe and crest points located seaward of shoreline points would be flagged and evaluated with reference to the DEM to determine which of the features were the more accurate. Shoreline points were removed where groups of three or fewer consecutive points (occupying 20 m or less alongshore) were separated from the shoreline trend in the surrounding areas (a general line suggested by the rest of the shoreline points and inferred by the operator). This is because sandy shorelines are expected to be generally linear features and these irregularities are often caused by an adjoining bar.
Finally, the points were converted from shapefile format to comma-separated text using the ArcGIS tool Export Table (version 10.5). Both the shapefile and the CSV files are included in this data release.
Process_Date: 2018
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Emily J Sturdivant
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543
Country: US
Contact_Voice_Telephone: 508-457-8700 x2230
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: esturdivant@usgs.gov
Process_Step:
Process_Description:
Added keywords section with USGS persistent identifier as theme keyword.
Process_Date: 20200810
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_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 18
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -75
Latitude_of_Projection_Origin: 0
False_Easting: 500000.0
False_Northing: 0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.6096
Ordinate_Resolution: 0.6096
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: North_American_Datum_1983
Ellipsoid_Name: GRS_1980
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257222101
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name: NAVD88
Altitude_Resolution: 0.000001
Altitude_Distance_Units: meter
Altitude_Encoding_Method: Attribute values
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: smi14_DCpts
Entity_Type_Definition:
Attribute values of 1197 dune crest positions recorded in the Esri shapefile smi14_DCpts.shp.
Entity_Type_Definition_Source: USGS
Attribute:
Attribute_Label: FID
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.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: state
Attribute_Definition: State segment file identification (ID) number.
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 12
Enumerated_Domain_Value_Definition: Virginia
Enumerated_Domain_Value_Definition_Source: Producer defined
Attribute:
Attribute_Label: seg
Attribute_Definition: Segment ID number used in processing (also labeled "segment").
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 22
Range_Domain_Maximum: 32
Attribute:
Attribute_Label: profile
Attribute_Definition:
Grid row number corresponding to a cross-shore profile location within the given segment.
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 336
Attribute:
Attribute_Label: lon
Attribute_Definition:
Longitude in WGS 84. Negative values indicate western hemisphere.
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -75.922984
Range_Domain_Maximum: -75.831726
Attribute_Units_of_Measure: decimal degrees
Attribute:
Attribute_Label: lat
Attribute_Definition: Latitude in WGS 84
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 37.112017
Range_Domain_Maximum: 37.180282
Attribute_Units_of_Measure: decimal degrees
Attribute:
Attribute_Label: easting
Attribute_Definition: Easting in NAD 83 UTM Zone 18N
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 417996.746151
Range_Domain_Maximum: 426168.508577
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: northing
Attribute_Definition: Northing in NAD 83 UTM Zone 18N
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 4107694.908855
Range_Domain_Maximum: 4115197.608298
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: dhigh_x
Attribute_Definition:
Cross-shore feature location relative to the generalized reference line, only relevant during processing.
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -696.857387
Range_Domain_Maximum: -34.235049
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: dhigh_z
Attribute_Definition: Feature elevation (NAVD88).
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1.184877
Range_Domain_Maximum: 3.330039
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: z_error
Attribute_Definition: Root mean squared vertical error of feature elevation (NAVD88).
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.00686
Range_Domain_Maximum: 0.431492
Attribute_Units_of_Measure: meters
Detailed_Description:
Entity_Type:
Entity_Type_Label: smi14_DTpts
Entity_Type_Definition:
Attributes for 813 dune toe positions recorded in the Esri shapefile smi14_DTpts.shp.
Entity_Type_Definition_Source: USGS
Attribute:
Attribute_Label: FID
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.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: state
Attribute_Definition: State segment file identification (ID) number.
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 12
Enumerated_Domain_Value_Definition: Virginia
Enumerated_Domain_Value_Definition_Source: Producer defined
Attribute:
Attribute_Label: seg
Attribute_Definition: Segment ID number used in processing (also labeled "segment").
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 22
Range_Domain_Maximum: 30
Attribute:
Attribute_Label: profile
Attribute_Definition:
Grid row number corresponding to a cross-shore profile location within the given segment.
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 233
Attribute:
Attribute_Label: lon
Attribute_Definition:
Longitude in WGS 84. Negative values indicate western hemisphere.
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -75.922821
Range_Domain_Maximum: -75.832888
Attribute_Units_of_Measure: decimal degrees
Attribute:
Attribute_Label: lat
Attribute_Definition: Latitude in WGS 84
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 37.111889
Range_Domain_Maximum: 37.17508
Attribute_Units_of_Measure: decimal degrees
Attribute:
Attribute_Label: easting
Attribute_Definition: Easting in NAD 83 UTM Zone 18N
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 418010.930025
Range_Domain_Maximum: 426062.488373
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: northing
Attribute_Definition: Northing in NAD 83 UTM Zone 18N
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 4107681.513317
Range_Domain_Maximum: 4114619.577049
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: dlow_x
Attribute_Definition:
Cross-shore feature location relative to the generalized reference line, only relevant during processing.
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -294.4679
Range_Domain_Maximum: -17.985049
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: dlow_z
Attribute_Definition: Feature elevation (NAVD88).
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1.00026
Range_Domain_Maximum: 1.980449
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: z_error
Attribute_Definition: Root mean squared vertical error of feature elevation (NAVD88).
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.01221
Range_Domain_Maximum: 0.456769
Attribute_Units_of_Measure: meters
Detailed_Description:
Entity_Type:
Entity_Type_Label: smi14_SLpts
Entity_Type_Definition:
Attribute values for 1094 shoreline positions recorded in the Esri shapefile smi14_SLpts.shp.
Entity_Type_Definition_Source: USGS
Attribute:
Attribute_Label: FID
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.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: state
Attribute_Definition: State segment file identification (ID) number.
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 12
Enumerated_Domain_Value_Definition: Virginia
Enumerated_Domain_Value_Definition_Source: Producer defined
Attribute:
Attribute_Label: seg
Attribute_Definition: Segment ID number used in processing (also labeled "segment").
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 22
Range_Domain_Maximum: 32
Attribute:
Attribute_Label: profile
Attribute_Definition:
Grid row number corresponding to a cross-shore profile location within the given segment.
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 336
Attribute:
Attribute_Label: sl_x
Attribute_Definition:
Cross-shore feature location relative to the generalized reference line, only relevant during processing.
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -498.499095
Range_Domain_Maximum: 24.101831
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: ci95_slx
Attribute_Definition: 95% confidence interval for the shoreline position
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 2.7e-05
Range_Domain_Maximum: 0.426702
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: slope
Attribute_Definition:
Mean beach slope calculated between dune toe and shoreline (NAVD88).
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -0.097215
Range_Domain_Maximum: -0.000977
Attribute_Units_of_Measure: radians
Attribute:
Attribute_Label: easting
Attribute_Definition: Easting in NAD 83 UTM Zone 18N
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 417902.309156
Range_Domain_Maximum: 426197.360871
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: northing
Attribute_Definition: Northing in NAD 83 UTM Zone 18N
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 4107564.04714
Range_Domain_Maximum: 4115267.554952
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: MHW
Attribute_Definition: Mean high water offset in meters.
Attribute_Definition_Source: Weber and others (2005)
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.34
Range_Domain_Maximum: 0.34
Attribute_Units_of_Measure: meters
Overview_Description:
Entity_and_Attribute_Overview:
This section provides a separate detailed entity and attribute information section for each dataset described in these metadata. Each shapefile has a companion CSV file that contains the same information. The first row of the CSV is a header line and corresponds to the attributes described in the detailed entity and attribute section for that particular dataset. Fields may be reordered and the FID field may be replaced by a software-specific OBJECTID value, in which values do not directly match. The Shape attribute is unique to the shapefile format and is populated with NoData values in the CSV.
Entity_and_Attribute_Detail_Citation: Methods Open-File Report by Zeigler and others, 2019
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey - ScienceBase
Contact_Address:
Address_Type: mailing address
Address: Denver Federal Center, Building 810, Mail Stop 302
City: Denver
State_or_Province: CO
Postal_Code: 80225
Country: United States
Contact_Voice_Telephone: 1-888-275-8747
Contact_Electronic_Mail_Address: sciencebase@usgs.gov
Resource_Description:
These datasets contain three individual shapefile point and corresponding CSV datasets: Dune crest points (smi14_DCpts.shp and other shapefile components, smi14_DCpts.csv), dune toe points (smi14_DTpts.shp and other shapefile components, smi14_DTpts.csv) and shoreline points (smi14_SLpts.shp and other shapefile components, smi14_SLpts.csv). Additionally, the CSDGM FGDC metadata (smi14_DC_DT_SLpts_meta.xml) in XML format and the browse graphic (DC_DT_SLpts_asis_browse.png) in PNG format are included. These datasets can be downloaded individually or packaged on-demand in a zip file (see the Digital Transfer Option section).
Distribution_Liability:
Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), and have been processed successfully on a computer system at the USGS, no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. The USGS or the U.S. Government shall not be held liable for improper or incorrect use of the data described and/or contained herein. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: Shapefile
Format_Version_Number: ArcGIS 10.5
Format_Specification:
Esri point shapefile and corresponding comma-separated values files
Format_Information_Content:
This dataset contains the point shapefiles and corresponding CSV files of the dune crest, dune toe, and shoreline positions. Also included is the CSDGM metadata and browse graphic.
Transfer_Size: 0.6
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: Access_Instructions:
The first link is to the page containing the data. The second is a direct link to download all data available from the page as a zip file. The final link is to the publication landing page. The data page (first link) may have additional data access options, including web services.
Fees: None
Technical_Prerequisites:
To utilize these data, the user must have software capable of reading shapefile or CSV format.
Metadata_Reference_Information:
Metadata_Date: 20200810
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Sara L. Zeigler
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: Mailing and Physical
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2290
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: szeigler@usgs.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

This page is <https://cmgds.marine.usgs.gov/catalog/whcmsc/SB_data_release/DR_P9V7F6UX/smi14_DC_DT_SLpts_meta.html>
Generated by mp version 2.9.50 on Tue Sep 21 18:20:11 2021