Alabama: intersect points used in long-term (LT) shoreline change analysis

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Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Meredith G. Kratzmann
Publication_Date: 20260622
Title:

Alabama: intersect points used in long-term (LT) shoreline change analysis

Edition: 1.0
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P1JE2KSO

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/P1JE2KSO
Online_Linkage:

https://www.sciencebase.gov/catalog/item/69e2b090b66b0195694c11ed

Larger_Work_Citation:

Citation_Information:

Originator: Meredith G. Kratzmann
Originator: Amy S. Farris
Originator: Kathryn M. Weber
Publication_Date: 2026
Title:

National Shoreline Change—A GIS compilation of vector shorelines and associated shoreline change data from the 1800s to the 2020s for the coast of Alabama

Edition: 1.0
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P1JE2KSO

Publication_Information:

Publication_Place: Reston, VA
Publisher: U.S. Geological Survey

Other_Citation_Details:

suggested citation: Kratzmann, M.G., Farris, A.S., and Weber, K.M., 2026, National Shoreline Change—A GIS compilation of vector shorelines and associated shoreline change data from the 1800s to the 2020s for the coast of Alabama: U.S. Geological Survey data release, https://doi.org/10.5066/P1JE2KSO.

Online_Linkage: https://doi.org/10.5066/P1JE2KSO
Online_Linkage:

https://www.sciencebase.gov/catalog/item/69e2a7d5b66b0195694c1197

Description:

Abstract:

The U.S. Geological Survey (USGS) maintains shoreline positions for the United States coasts from various historical sources, such as aerial photographs or topographic surveys, and contemporary sources, such as lidar-point clouds and digital elevation models. Shorelines are compiled in a Geographic Information System (GIS) and analyzed in the USGS Digital Shoreline Analysis System (DSAS) software to calculate rates of change. Keeping a record of historical shoreline positions is an effective method to monitor change over time, enabling scientists to identify areas most susceptible to erosion or accretion. These data can help coastal managers understand which areas of the coast are vulnerable to change. The shoreline positions and shoreline change rates provide actionable information to homeowners, coastal communities, and managers of public and private properties to improve resiliency for coastal hazards.

Purpose:

Point data were created at the intersection of shoreline and transect locations during rate calculation by the Digital Shoreline Analysis System (DSAS) version 6.1 for the Alabama coastal region. Orthogonal transects cast by DSAS from a reference baseline intersect the shorelines, and the intersect data provide location and date information used to calculate long-term (century-scale) rates of change. These point data contain identifiers related to the DSAS transect (transorder), baseline (baselineid), and the shoreline (shoreline0 [date], decimalye0 [date in decimal year format]). Coordinates, uncertainty, and bias information are also included in the intersect point file.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2026

Currentness_Reference: publication date

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -88.333247
East_Bounding_Coordinate: -87.518560
North_Bounding_Coordinate: 30.281325
South_Bounding_Coordinate: 30.220701

Keywords:

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: environment
Theme_Keyword: geoscientificInformation

Theme:

Theme_Keyword_Thesaurus: None
Theme_Keyword: Intersects
Theme_Keyword: Intersect points
Theme_Keyword: Shoreline change
Theme_Keyword: Digital Shoreline Analysis System
Theme_Keyword: DSAS
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Hazards and Resources Program
Theme_Keyword: CMHRP
Theme_Keyword: Woods Hole Coastal and Marine Science Center
Theme_Keyword: WHCMSC

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: geospatial datasets
Theme_Keyword: coastal processes

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:69e2b090b66b0195694c11ed

Place:

Place_Keyword_Thesaurus: GNIS
Place_Keyword: State of Alabama
Place_Keyword: Dauphin Island
Place_Keyword: Fort Morgan Alabama
Place_Keyword: Gulf Shores

Place:

Place_Keyword_Thesaurus: None
Place_Keyword: Gulf Coast
Place_Keyword: Bon Secour National Wildlife Refuge
Place_Keyword: United States of America
Place_Keyword: North America

Access_Constraints:

No access constraints. Please see 'Distribution Information' for details.

Use_Constraints:

These data are marked with a Creative Commons CC0 1.0 Universal License. These data are in the public domain and do not have any use constraints. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations. These data were automatically generated using the DSAS v6.1 software application. Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset. These data are not to be used for navigation.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: Meredith G. Kratzmann

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
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: [email protected]

Browse_Graphic:

Browse_Graphic_File_Name:

https://www.sciencebase.gov/catalog/file/get/69e2b090b66b0195694c11ed?name=AL_intersects_LT.png&allowOpen=true

Browse_Graphic_File_Description:

Map view of data. Green dots indicate the extent of the long-term (century-scale) shoreline intersect points for Alabama.

Browse_Graphic_File_Type: PNG

Native_Data_Set_Environment: Microsoft Windows 11 Enterprise; Esri ArcGIS Pro 3.5.5
Cross_Reference:

Citation_Information:

Originator: Rachel E. Henderson
Originator: Amy S. Farris
Originator: Meredith G. Kratzmann
Originator: Marie K. Bartlett
Originator: Ayhan Ergul
Originator: John McAndrews
Originator: Raison Cibaj
Originator: Jessica L. Zichichi
Originator: Emily A. Himmelstoss
Originator: E. Robert Thieler
Publication_Date: 2026
Title: Digital Shoreline Analysis System version 6.1
Geospatial_Data_Presentation_Form: publication
Series_Information:

Series_Name: software release
Issue_Identification: version 6.1.177

Publication_Information:

Publication_Place: Reston, VA
Publisher: U.S. Geological Survey

Other_Citation_Details:

Use the first link to access the publication page. The second link is to the current version of DSAS (v6.1). The third link directs to the DSAS project page.

Online_Linkage: https://doi.org/10.5066/P1NHMJNC
Online_Linkage: https://code.usgs.gov/cch/dsas
Online_Linkage:

https://www.usgs.gov/centers/whcmsc/science/digital-shoreline-analysis-system-dsas

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

The attributes of this dataset are based on the field requirements of the Digital Shoreline Analysis System and were automatically generated by the software during creation of the intersect points layer.

Logical_Consistency_Report:

These data were generated using DSAS, an automated software program, which does not perform checks for fidelity of the input features. Following generation of the rates and intersects by the DSAS software a visual inspection of the intersects was performed in map view to determine that no measurements were included that did not have a corresponding transect for the shoreline change analysis.

Completeness_Report:

This dataset contains all shoreline/transect intersect points used to compute shoreline change rates in the DSAS software application.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

The intersect points represent the location where transects cast by the DSAS software cross a historical shoreline position. The points can be used to visually display which shorelines were used in the rate calculation and capture details on the shoreline represented at the intersection. The distances between the reference baseline and each shoreline intersection along a transect are used by the DSAS software to compute the shoreline change metrics.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Meredith G. Kratzmann
Publication_Date: 2026
Title:

Alabama: baseline generated to calculate shoreline change rates in Kratzmann, M.G., Farris, A.S., and Weber, K.M., 2026, National Shoreline Change—A GIS compilation of vector shorelines and associated shoreline change data from the 1800s to the 2020s for the coast of Alabama: U.S. Geological Survey data release, https://doi.org/10.5066/P1JE2KSO

Edition: 1.0
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P1JE2KSO

Publication_Information:

Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey

Other_Citation_Details:

The first link is to the larger work, the second link is to the baseline dataset.

Online_Linkage: https://doi.org/10.5066/P1JE2KSO
Online_Linkage:

https://www.sciencebase.gov/catalog/item/69e2afc2b66b0195694c11e3

Type_of_Source_Media: digital data
Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2026

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: AL_baseline
Source_Contribution:

Baseline segments for Alabama (part of this same data release https://doi.org/10.5066/P1JE2KSO) are used by DSAS to cast measurement transects.

Source_Information:

Source_Citation:

Citation_Information:

Originator: Meredith G. Kratzmann
Originator: Amy S. Farris
Publication_Date: 2026
Title:

Alabama: shorelines (1849-2022) used to calculate shoreline change rates in Kratzmann, M.G., Farris, A.S., and Weber, K.M., 2026, National Shoreline Change—A GIS compilation of vector shorelines and associated shoreline change data from the 1800s to the 2020s for the coast of Alabama: U.S. Geological Survey data release, https://doi.org/10.5066/P1JE2KSO

Edition: 1.0
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P1JE2KSO

Publication_Information:

Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey

Other_Citation_Details:

The first link is to the larger work, the second link is to the shorelines dataset.

Online_Linkage: https://doi.org/10.5066/P1JE2KSO
Online_Linkage:

https://www.sciencebase.gov/catalog/item/69e2b013b66b0195694c11e7

Type_of_Source_Media: digital data
Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2026

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: AL_shorelines
Source_Contribution:

Shoreline data for Alabama (part of this same data release https://doi.org/10.5066/P1JE2KSO).

Source_Information:

Source_Citation:

Citation_Information:

Originator: Meredith G. Kratzmann
Originator: Amy S. Farris
Publication_Date: 2026
Title:

Alabama: bias feature containing proxy-datum bias information used in shoreline change rate calculations in Kratzmann, M.G., Farris, A.S., and Weber, K.M., 2026, National Shoreline Change—A GIS compilation of vector shorelines and associated shoreline change data from the 1800s to the 2020s for the coast of Alabama: U.S. Geological Survey data release, https://doi.org/10.5066/P1JE2KSO

Edition: 1.0
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P1JE2KSO

Publication_Information:

Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey

Other_Citation_Details:

The first link is to the larger work, the second link is to the bias feature dataset.

Online_Linkage: https://doi.org/10.5066/P1JE2KSO
Online_Linkage:

https://www.sciencebase.gov/catalog/item/69e2b0f0b66b0195694c11f1

Type_of_Source_Media: digital data
Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2026

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: AL_bias
Source_Contribution:

Bias feature for Alabama (part of this same data release https://doi.org/10.5066/P1JE2KSO) used by DSAS to calculate rates that account for the offset between proxy-based HWL/WDL (wet dry line) and datum-based MHW shorelines.

Process_Step:

Process_Description:

Overview of the workflow used to calculate shoreline change rates and intersection points as part of the shoreline change analysis using DSAS v6.1: 1) Transects were generated at 50-meter spacing using a manually created baseline and shorelines compiled for Alabama (see source citations in the shorelines metadata file); 2) Manual edits to transects performed; 3) Transects and shorelines were used to generate intersection points and calculate rates of change. The following process steps describe these actions.
For more details on the DSAS software, please visit: https://www.usgs.gov/centers/whcmsc/science/digital-shoreline-analysis-system-dsas
This and the following process steps were performed by the same person: Meredith Kratzmann.

Process_Date: 2026
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: Meredith Kratzmann

Contact_Address:

Address_Type: Mailing and Physical
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543

Contact_Voice_Telephone: 508-548-8700
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: [email protected]

Process_Step:

Process_Description:

DSAS v6.1 was used to create transect features using the baseline and shorelines shapefiles for Alabama. Input parameters: shoreline layer = Shorelines_AL, baseline layer= Baseline_AL, transect spacing= 50 meters, transect length= 1500 meters, smoothing distance= 2000 meters, clip transects to shoreline extent= unchecked. File produced= AL_transects_ALL. Some transects were manually edited for length, moved, or deleted in an edit session using standard editing tools in ArcGIS Pro 3.5.5. Edited transect shapefile was renamed= AL_transects.

Source_Used_Citation_Abbreviation: Baseline_AL
Source_Used_Citation_Abbreviation: Shorelines_AL
Process_Date: 2026
Source_Produced_Citation_Abbreviation: AL_transects

Process_Step:

Process_Description:

To calculate long-term (LT) shoreline change rates, Alabama shorelines from 1849 to 2022 were utilized with the DSAS-generated transects to create shoreline intersect points and perform rate calculations. Input parameters: shoreline layer= Shorelines_AL, transects layer= AL_transects, bias feature= AL_bias, date range= full range (all shorelines), shoreline intersection threshold= 2, calculate= EPR (end point rate), LRR (linear regression rate), NSM (net shoreline movement), SCE (shoreline change envelope), confidence interval=90%, create DSAS summary report= checked. Shapefiles produced= al_transects_intersect_20260114_141331, al_transects_rates_20260114_141331.

Source_Used_Citation_Abbreviation: Shorelines_AL
Source_Used_Citation_Abbreviation: AL_transects
Source_Used_Citation_Abbreviation: AL_bias
Process_Date: 2026
Source_Produced_Citation_Abbreviation: al_transects_intersect_20260114_141331
Source_Produced_Citation_Abbreviation: al_transects_rates_20260114_141331

Process_Step:

Process_Description:

The intersect point layer was exported from DSAS using the Export Data tool and renamed= AL_intersects_LT.

Source_Used_Citation_Abbreviation: al_transects_intersect_20260114_141331
Process_Date: 2026
Source_Produced_Citation_Abbreviation: AL_intersects_LT

Process_Step:

Process_Description:

The intersects shapefile was projected in ArcGIS Pro v3.5.5 > Geoprocessing > Data Management Tools > Projections and Transformations > Project. Parameters: Input Coordinate System - NAD_1983_2011_UTM_Zone_16N; Output Coordinate System - GCS_WGS_1984; transformation = WGS_1984_(ITRF08)_To_NAD_1983_2011.

Process_Date: 2026

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 27402

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.0000001
Longitude_Resolution: 0.0000001
Geographic_Coordinate_Units: Decimal degrees

Geodetic_Model:

Horizontal_Datum_Name: WGS_1984
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257224

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: AL_intersects_LT.shp
Entity_Type_Definition:

The intersection points are generated by DSAS where each DSAS-generated transect crosses a shoreline. The points were used to compute long-term shoreline change rates in Alabama.

Entity_Type_Definition_Source: U.S. Geological Survey

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: Feature type.

Attribute:

Attribute_Label: transorder
Attribute_Definition:

Number assigned by DSAS based on the ordering of transects from baseline start to baseline end.

Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 37
Range_Domain_Maximum: 1819

Attribute:

Attribute_Label: baselineid
Attribute_Definition:

Values in this field correlate to the baseline attribute field DSAS_ID and are assigned by DSAS to identify the baseline segment used to generate the measurement transect. Baseline segments assigned an ID = 0 are ignored by DSAS and no transects will be cast along those line segments.

Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1
Range_Domain_Maximum: 4

Attribute:

Attribute_Label: shoreline0
Attribute_Definition:

Date of shoreline position; date of survey as determined from shoreline layer. Text field.

Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Unrepresentable_Domain: Date of the shoreline in MM/DD/YYYY

Attribute:

Attribute_Label: decimalye0
Attribute_Definition:

Date of shoreline position in decimal year format. A decimal year is a representation of time expressed as the year plus the time elapsed since the beginning of the year as a fraction of the whole year. Since there are 365 days in one common year, a tenth of the common year is equal to 36.5 days (36 days and 12 hours). For example, the date 11/05/2019 is expressed as the decimal year 2019.846575.

Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1849.498630
Range_Domain_Maximum: 2022.547945

Attribute:

Attribute_Label: distance
Attribute_Definition:

The distance in meters between the DSAS reference baseline and the shoreline intersection point along a DSAS transect. Negative decimal values indicate that the intersect point is located landward of the baseline. Positive decimal values indicate that the intersect point is located seaward of the baseline.

Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -1453.81
Range_Domain_Maximum: -103.77
Attribute_Units_of_Measure: meters

Attribute:

Attribute_Label: intersectx
Attribute_Definition:

The X-coordinate location in eastings of the intersect point in NAD_1983_2011_UTM_Zone_16N.

Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 371702.276286
Range_Domain_Maximum: 450127.073701
Attribute_Units_of_Measure: meters

Attribute:

Attribute_Label: intersecty
Attribute_Definition:

The Y-coordinate location in northings of the intersect point in NAD_1983_2011_UTM_Zone_16N.

Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 3343684.405995
Range_Domain_Maximum: 3350074.637824
Attribute_Units_of_Measure: meters

Attribute:

Attribute_Label: uncertain0
Attribute_Definition:

The uncertainty of the shoreline position at the intersect point, as defined by the positional uncertainty attribute value (Uncy) of the shoreline dataset.

Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.99
Range_Domain_Maximum: 13.00

Attribute:

Attribute_Label: dsas_type
Attribute_Definition:

Shoreline type field used to specify the shoreline proxy or datum to which the shoreline (at the intersection point) is referenced.

Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: MHW
Enumerated_Domain_Value_Definition: Mean High Water (datum-based shoreline).
Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: HWL
Enumerated_Domain_Value_Definition: High Water Line (proxy-based shoreline).
Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: WDL
Enumerated_Domain_Value_Definition: Wet-Dry Line (proxy-based shoreline).
Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey

Attribute:

Attribute_Label: bias_x
Attribute_Definition:

The X coordinate of the intersect point with the bias applied, NAD_1983_2011_UTM_Zone_16N.

Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 371702.276286
Range_Domain_Maximum: 450127.073701
Attribute_Units_of_Measure: meters

Attribute:

Attribute_Label: bias_y
Attribute_Definition:

The Y coordinate of the intersect point with the bias applied, NAD_1983_2011_UTM_Zone_16N.

Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 3343679.938298
Range_Domain_Maximum: 3350069.973385
Attribute_Units_of_Measure: meters

Attribute:

Attribute_Label: bias
Attribute_Definition:

The proxy-datum bias value describing the unidirectional horizontal offset (in meters) between the MHW elevation of the lidar data and HWL shoreline proxy position.

Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 4.33
Range_Domain_Maximum: 5.99
Attribute_Units_of_Measure: meters

Attribute:

Attribute_Label: bias_dist0
Attribute_Definition:

The distance in meters along the transect from the baseline to the intersect point, with the proxy-datum bias applied.

Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -1449.07
Range_Domain_Maximum: -103.77
Attribute_Units_of_Measure: meters

Attribute:

Attribute_Label: bias_unce0
Attribute_Definition:

The uncertainty in the position of the HWL associated with the calculated proxy-datum bias value.

Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.99
Range_Domain_Maximum: 13.00

Overview_Description:

Entity_and_Attribute_Overview:

The entity and attribute information provided here describes the tabular data associated with the intersect points needed to calculate long-term shoreline change rates for Alabama. Please review the individual attribute descriptions for detailed information. All calculations for length are in meter units, NAD_1983_2011_UTM_Zone_16N.

Entity_and_Attribute_Detail_Citation: U.S. Geological Survey

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey - GS ScienceBase

Contact_Address:

Address_Type: mailing and physical 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: [email protected]

Resource_Description:

The dataset contains the point intersections used for the analysis of shoreline data (SHP and other shapefile components), browse graphic, and the FGDC CSDGM metadata.

Distribution_Liability:

Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (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.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: Shapefile
Format_Version_Number: ArcGIS Pro version 3.5.5
Format_Specification: Esri point shapefile (compressed to ZIP format)
Format_Information_Content:

These files (.cpg, .dbf, .prj, .sbn, .sbx, .shp, .html, and .shx) are a collection of files with a common filename prefix and must be downloaded and stored in the same directory. Together they are the components of the shapefile and include FGDC CSDGM-compliant metadata in HTML format. Transfer size is in MB.

File_Decompression_Technique: Unzip
Transfer_Size: 1.56

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: https://doi.org/10.5066/P1JE2KSO
Network_Resource_Name:

https://www.sciencebase.gov/catalog/item/69e2b090b66b0195694c11ed

Network_Resource_Name:

https://www.sciencebase.gov/catalog/file/get/69e2b090b66b0195694c11ed

Access_Instructions:

The first link is to the USGS publication page, the second link is to the dataset page, and the third link downloads the data.

Fees: None

Technical_Prerequisites:

These data are available in a point shapefile format. The user must have software to read and process the data components of a shapefile.

Metadata_Reference_Information:

Metadata_Date: 20260622
Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Meredith G. Kratzmann
Contact_Organization: U.S. Geological Survey

Contact_Address:

Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA

Contact_Voice_Telephone: 508-548-8700
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: [email protected]
Contact_Instructions:

The metadata contact email address is a generic address in the event the person is no longer with USGS.

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time

This page is <https://cmgds.marine.usgs.gov/catalog/whcmsc/SB_data_release/DR_P1JE2KSO/AL_intersects_LT_metadata.html>