Metadata: Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 20170616 Title: Transects_OpenOcean.shp - Digital Shoreline Analysis System version 4.3 Transects with Linear Regression Rate Calculations for the Open Ocean coast of Dauphin Island, Alabama. Edition: first Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: U.S. Geological Survey Data Release Issue_Identification: doi:10.5066/F7T43RB5 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/F7T43RB5 Description: Abstract: Rates of shoreline change for Dauphin Island, Alabama were generated for three analysis periods, using two different shoreline proxy datasets. Mean High Water line (MHW) shorelines were generated from 14 lidar datasets (1998-2014) and Wet Dry Line (WDL) shorelines were digitized from ten sets of georeferenced aerial images (1940-2015). Rates of change were generated for three groups of shorelines: MHW (lidar), WDL (aerial) and MHW and WDL shorelines combined. These data will aid in developing an understanding of the evolution of the barrier island position, size and shape as well as documenting spatially-variable patterns in erosion and accretion of different sections of the island. Purpose: This dataset consists of shore perpendicular transects and associated shoreline change rates from lidar and aerial imagery sources for the open ocean (south-facing) coast of Dauphin Island Alabama. Rate calculations were computed within a GIS using the Digital Shoreline Analysis System (DSAS) version 4.3, an ArcGIS extension developed by the U.S. Geological Survey. A reference baseline was used as the originating point for the orthogonal transects cast by the DSAS software. The transects intersect each shoreline establishing measurement points, which are then used to calculate long-term rates. Long-term rates of shoreline change were calculated using a linear regression rate based on available shoreline data. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19401027 Ending_Date: 20151112 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -88.347875 East_Bounding_Coordinate: -88.070575 North_Bounding_Coordinate: 30.287079 South_Bounding_Coordinate: 30.222462 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:5ce9fe77-24c9-40ee-96c6-e9ee5b347395 Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: Boundaries Theme_Keyword: GeoscientificInformation Theme_Keyword: Oceans Theme_Keyword: Environment Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: geology Theme_Keyword: geomorphology Theme_Keyword: coastal processes Theme_Keyword: unconsolidated deposits Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Vectorization Theme_Keyword: Digital Shoreline Analysis System (DSAS) Theme_Keyword: DSAS Theme_Keyword: Transects Theme_Keyword: Shoreline Change Theme_Keyword: Shoreline Theme_Keyword: Mean High Water (MHW) Theme_Keyword: Lidar Theme_Keyword: Coastal Theme_Keyword: Wet Dry Line (WDL) Theme_Keyword: Georeferenced Aerial Imagery Theme_Keyword: Historic Shoreline Theme_Keyword: Long-Term Shoreline Change Rate Theme_Keyword: Erosion Theme_Keyword: Accretion Theme_Keyword: Linear Regression Rate Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: SPCMSC Theme_Keyword: St. Petersburg Coastal and Marine Science Center Place: Place_Keyword_Thesaurus: None Place_Keyword: Alabama Place_Keyword: Dauphin Island Place_Keyword: Gulf of Mexico Place_Keyword: USA Place_Keyword: AL Access_Constraints: None Use_Constraints: These data were automatically generated using the DSAS v4.3 software application and should only be used for purposes explicitly stated by the originating organization. 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. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, St. Petersburg, Florida Contact_Person: Rachel E. Henderson Contact_Address: Address_Type: mailing address Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727)-502-8000 Contact_Electronic_Mail_Address: rehenderson@usgs.gov Data_Set_Credit: St. Petersburg Coastal and Marine Science Center Native_Data_Set_Environment: Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.0.5.4400 Cross_Reference: Citation_Information: Originator: E.R. Thieler Originator: E.A. Himmelstoss Originator: J.L. Zichichi Originator: A. Ergul Publication_Date: 2009 Title: Digital Shoreline Analysis System (DSAS) version 4.0 - An ArcGIS extension for calculating shoreline change Series_Information: Series_Name: Open-File Report Issue_Identification: 2008-1278 Publication_Information: Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Other_Citation_Details: Current version of software at time of use was 4.3 Online_Linkage: https://pubs.er.usgs.gov/publication/ofr20081278 Online_Linkage: https://woodshole.er.usgs.gov/project-pages/DSAS/ Online_Linkage: https://woodshole.er.usgs.gov/project-pages/DSAS/version4/index.html 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 the generation of the transect layer or during the calculation of shoreline change rates performed by the software. Logical_Consistency_Report: These data were generated using DSAS v4.3, an automated software program, which does not perform checks for fidelity of the input features. Transects were visually inspected and sometimes manually adjusted within a standard ArcMap edit session to adjust the position at which an individual transect intersected the shorelines. Completeness_Report: This dataset contains transects automatically generated by the DSAS software application that were used to calculate shoreline change rates for the region. Lineage: Process_Step: Process_Description: Transect features generated using DSAS v4.3 in ArcMap v10.0. Parameters used: baseline layer=Baseline_OpenOcean, baseline group field=NULL, transect spacing=100 meters, transect length=1200 meters, cast direction=AUTO-DETECT, baseline location=offshore, cast method=smoothed, smoothing distance=50 meters, flip baselines=not selected. For additional details on these parameters, please see the DSAS help file distributed with the DSAS software, or visit the USGS website at: https://woodshole.er.usgs.gov/project-pages/DSAS/ Source_Used_Citation_Abbreviation: Baseline_OpenOcean Process_Date: 20160901 Source_Produced_Citation_Abbreviation: DI_Transects_OpenOcean Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, St. Petersburg, Florida Contact_Person: Rachel E. Henderson Contact_Address: Address_Type: mailing address Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727)-502-8000 Contact_Electronic_Mail_Address: rehenderson@usgs.gov Process_Step: Process_Description: Some transects did not intersect all shorelines at the default transect length. These transects were manually lengthened or moved in an edit session, using standard editing tools in ArcMap v10.0, such that each transect intersects all desired shorelines. Source_Used_Citation_Abbreviation: DI_Transects_OpenOcean Process_Date: 20160901 Source_Produced_Citation_Abbreviation: DI_Transects_OpenOcean2 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, St. Petersburg, Florida Contact_Person: Rachel E. Henderson Contact_Address: Address_Type: mailing address Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727)-502-8000 Contact_Electronic_Mail_Address: rehenderson@usgs.gov Process_Step: Process_Description: Shorelines, transects and baselines were imported into a personal geodatabase, which was stored in the Microsoft Access file, DI_MHW_1998_2014.mdb Rate calculations performed on MHW (lidar) shorelines, using DSAS v4.3 in ArcMap v10.0. Open-ocean shorelines (including "Open-Ocean (Dauphin Island)", and "Open-Ocean(Little Dauphin Island)")were selected from the MHW_shorelines attribute table, and resulting selected shorelines were used in the following DSAS analysis: Parameters used: baseline layer=DI_Baseline_OpenOcean, shoreline layer=Lidar_MHW_Shorelines_1998_2014 (open ocean ONLY), shoreline date field=DATE_, shoreline uncertainty field name=UNCERTY, shoreline intersection parameters=closest, Transect layer= DI_Transects_OpenOcean2, stats calculations=[Linear Regression Rate (LRR)], confidence interval=90% Source_Used_Citation_Abbreviation: DI_Transects_OpenOcean2 Source_Used_Citation_Abbreviation: Lidar_Shorelines_1998_2014 Source_Used_Citation_Abbreviation: Baseline_OpenOcean Process_Date: 20170324 Source_Produced_Citation_Abbreviation: DI_Ocean_trans_MHW_rates_20170324_150108.dbf Source_Produced_Citation_Abbreviation: DI_Ocean_trans_MHW_intersect_20170324_150108.dbf Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, St. Petersburg, Florida Contact_Person: Rachel E. Henderson Contact_Address: Address_Type: mailing address Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727)-502-8000 Contact_Electronic_Mail_Address: rehenderson@usgs.gov Process_Step: Process_Description: Shorelines, transects and baseline data were imported into a personal geodatabase, which was stored in the Microsoft Access file, DI_WDL_1940_2015.mdb Rate calculations performed on WDL (aerial) shorelines using DSAS v4.3 in ArcMap v10.0. Open-ocean shorelines (including "Open Ocean", and "Open Ocean(Little Dauphin Island)")were selected from the WDL_shorelines attribute table, and resulting selected shorelines were used in the following DSAS analysis: Parameters Used: baseline layer=DI_Baseline_OpenOcean, shoreline layer=Aerial_WDL_Shorelines_1940_2015 (open ocean ONLY), shoreline date field=DATE_, shoreline uncertainty field name=UNCERT, shoreline intersection parameters=closest, Transect layer= DI_Transects_OpenOcean2, stats calculations=[Linear Regression Rate (LRR)], confidence interval=90% Source_Used_Citation_Abbreviation: DI_Transects_OpenOcean2 Source_Used_Citation_Abbreviation: Aerial_Shorelines_1940_2015 Source_Used_Citation_Abbreviation: Baseline_OpenOcean Process_Date: 20170324 Source_Produced_Citation_Abbreviation: DI_Ocean_trans_WDL_rates_20170324_141626.dbf Source_Produced_Citation_Abbreviation: DI_Ocean_trans_WDL_intersect_20170324_141626.dbf Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, St. Petersburg, Florida Contact_Person: Rachel E. Henderson Contact_Address: Address_Type: mailing address Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727)-502-8000 Contact_Electronic_Mail_Address: rehenderson@usgs.gov Process_Step: Process_Description: MHW (lidar) and WDL (aerial) shorelines were combined (copy and paste) into one feature class. Source_Used_Citation_Abbreviation: Aerial_Shorelines_1940_2015 Source_Used_Citation_Abbreviation: Lidar_Shorelines_1998_2014 Process_Date: 20170324 Source_Produced_Citation_Abbreviation: MHW_WDL_shorelines.shp Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, St. Petersburg, Florida Contact_Person: Rachel E. Henderson Contact_Address: Address_Type: mailing address Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727)-502-8000 Contact_Electronic_Mail_Address: rehenderson@usgs.gov Process_Step: Process_Description: Shorelines, transects and baselines were imported into a personal geodatabase, which was stored in the Microsoft Access file, DI_MHW_WDL_1940_2015.mdb Rate calculations performed on WDL (aerial) and MHW (lidar) shorelines using DSAS v4.3 in ArcMap v10.0. Open-ocean shorelines (including "Open Ocean", "Open Ocean (Dauphin Island)", and "Open Ocean(Little Dauphin Island)")were selected from the MHW_WDL_shorelines attribute table, and resulting selected shorelines were used in the following DSAS analysis: Parameters used: baseline layer=DI_Baseline_OpenOcean, shoreline layer=WDL_MHW_Shorelines_1940_2015 (open ocean ONLY), shoreline date field=DATE_, shoreline uncertainty field name=UNCERT, shoreline intersection parameters=closest, Transect layer= DI_Transects_OpenOcean2, stats calculations=[Linear Regression Rate (LRR)], confidence interval=90% Source_Used_Citation_Abbreviation: DI_Transects_OpenOcean2 Source_Used_Citation_Abbreviation: MHW_WDL_shorelines Source_Used_Citation_Abbreviation: Baseline_OpenOcean Process_Date: 20170324 Source_Produced_Citation_Abbreviation: DI_Ocean_trans_ALL_rates_20170324_151043.dbf Source_Produced_Citation_Abbreviation: DI_Ocean_trans_ALL_intersect_20170324_151043.dbf Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, St. Petersburg, Florida Contact_Person: Rachel E. Henderson Contact_Address: Address_Type: mailing address Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727)-502-8000 Contact_Electronic_Mail_Address: rehenderson@usgs.gov Process_Step: Process_Description: DI_Transects_OpenOcean file exported to a new geodatabase - Trans_ALL.mdb New fields added to attribute table include TCD (double), MHW_LRR (double), MHW_LR2 (double), MHW_LSE (double), MHW_LCI90 (double), WDL_LRR (double), WDL_LR2 (double), WDL_LSE (double), WDL_LCI90 (double), ALL_LRR (double), ALL_LR2(double), ALL_LSE(double), ALL_LCI90 (double). Source_Used_Citation_Abbreviation: DI_Transects_OpenOcean2 Process_Date: 20170327 Source_Produced_Citation_Abbreviation: Transects_OpenOcean Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, St. Petersburg, Florida Contact_Person: Rachel E. Henderson Contact_Address: Address_Type: mailing address Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727)-502-8000 Contact_Electronic_Mail_Address: rehenderson@usgs.gov Process_Step: Process_Description: Shoreline change rates from each shoreline analysis (MHW, WDL, and combined MHW+WDL) were appended to one transect file as follows: DI_Ocean_trans_MHW_rates_20170324_150108.dbf were joined to Transects_OpenOcean.shp by TransectID/ TransOrder, and values for LRR, LR2, LSE, LCI90 were copied to the corresponding attribute fields - MHW_LRR, MHW_LR2, MHW_LSE, MHW_LCI90. DI_Ocean_trans_WDL_rates_20170324_141626.dbf were joined to Transects_OpenOcean.shp by TransectID/ TransOrder, and values for LRR, LR2, LSE, LCI90 were copied to the corresponding attribute fields - WDL_LRR, WDL_LR2, WDL_LSE, WDL_LCI90. DI_Ocean_trans_ALL_rates_20170324_151043.dbf were joined to Transects_OpenOcean.shp by TransectID/ TransOrder, and values for LRR, LR2, LSE, LCI90 were copied to the corresponding attribute fields - ALL_LRR, ALL_LR2, ALL_LSE, ALL_LCI90. Source_Used_Citation_Abbreviation: Transects_OpenOcean Source_Used_Citation_Abbreviation: DI_Ocean_trans_MHW_rates_20170324_150108.dbf Source_Used_Citation_Abbreviation: DI_Ocean_trans_WDL_rates_20170324_141626.dbf Source_Used_Citation_Abbreviation: DI_Ocean_trans_ALL_rates_20170324_151043.dbf Process_Date: 20170327 Source_Produced_Citation_Abbreviation: Transects_OpenOcean Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, St. Petersburg, Florida Contact_Person: Rachel E. Henderson Contact_Address: Address_Type: mailing address Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727)-502-8000 Contact_Electronic_Mail_Address: rehenderson@usgs.gov Process_Step: Process_Description: The transect feature class Transect_OpenOcean was exported to a shapefile in ArcMap v10.0 by right clicking on the dataset in the geodatabase >> Export >> To Shapefile (single). Source_Used_Citation_Abbreviation: Transects_OpenOcean Process_Date: 20170327 Source_Produced_Citation_Abbreviation: Transects_OpenOcean.shp Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, St. Petersburg, Florida Contact_Person: Rachel E. Henderson Contact_Address: Address_Type: mailing address Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727)-502-8000 Contact_Electronic_Mail_Address: rehenderson@usgs.gov Process_Step: Process_Description: Added keywords section with USGS persistent identifier as theme keyword. Process_Date: 20201013 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: VeeAnn A. Cross Contact_Position: Marine Geologist Contact_Address: Address_Type: Mailing and Physical Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2251 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 342 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 16 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -87.0 Latitude_of_Projection_Origin: 0.0 False_Easting: 500000.0 False_Northing: 0.0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.6096 Ordinate_Resolution: 0.6096 Planar_Distance_Units: Meter Geodetic_Model: Horizontal_Datum_Name: D_North_American_1983 Ellipsoid_Name: GRS_1980 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257222101 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: Transects_OpenOcean Entity_Type_Definition: Transects are automatically generated by DSAS at a 90 degree angle to the user-specified baseline. Entity_Type_Definition_Source: U.S. Geological Survey, Woods Hole Science Center 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: BaselineID Attribute_Definition: Unique identification number of the baseline segment. If BaselineID=0 no transects will be generated. Used by DSAS to determine transect ordering alongshore if multiple baseline segments exist. Attribute_Definition_Source: U.S. Geological Survey, Woods Hole Science Center Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 1 Attribute: Attribute_Label: TransOrder Attribute_Definition: Assigned by DSAS based on ordering of transects along the baseline. Used to allow user to sort transect data along the baseline from baseline start to baseline end. Attribute_Definition_Source: U.S. Geological Survey, Woods Hole Science Center Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 342 Attribute: Attribute_Label: ProcTime Attribute_Definition: Assigned by DSAS, automatically, to record the date and time a transect was processed. Attribute_Definition_Source: U.S. Geological Survey, Woods Hole Science Center Attribute_Domain_Values: Unrepresentable_Domain: Values based on time and date of user operations Attribute: Attribute_Label: Autogen Attribute_Definition: Assigned by DSAS to indicate whether or not a transect was automatically created by DSAS (1= transect was auto generated by DSAS; 0=transect was not auto-generated). Attribute_Definition_Source: U.S. Geological Survey, Woods Hole Science Center Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 1 Attribute: Attribute_Label: StartX Attribute_Definition: Assigned by DSAS, automatically, to record the X coordinate of the beginning of the transect. Attribute_Definition_Source: U.S. Geological Survey, Woods Hole Science Center Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 370367.07 Range_Domain_Maximum: 396976.26 Attribute_Units_of_Measure: NAD 83 UTM Zone 16N meters Attribute: Attribute_Label: StartY Attribute_Definition: Assigned by DSAS, automatically, to record the Y coordinate of the beginning of the transect. Attribute_Definition_Source: U.S. Geological Survey, Woods Hole Science Center Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3344203.44 Range_Domain_Maximum: 3351082.51 Attribute_Units_of_Measure: NAD 83 UTM Zone 16N meters Attribute: Attribute_Label: EndX Attribute_Definition: Assigned by DSAS, automatically, to record the X coordinate of the end of the transect. Attribute_Definition_Source: U.S. Geological Survey, Woods Hole Science Center Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 370922.88 Range_Domain_Maximum: 395629.38 Attribute_Units_of_Measure: NAD 83 UTM Zone 16N meters Attribute: Attribute_Label: EndY Attribute_Definition: Assigned by DSAS, automatically, to record the Y coordinate of the end of the transect. Attribute_Definition_Source: U.S. Geological Survey, Woods Hole Science Center Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3345703.42 Range_Domain_Maximum: 3349804.74 Attribute_Units_of_Measure: NAD 83 UTM Zone 16N meters Attribute: Attribute_Label: Azimuth Attribute_Definition: Assigned by DSAS to record the azimuth of the transect, measured in degrees clockwise from North. Attribute_Definition_Source: U.S. Geological Survey, Woods Hole Science Center Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.1 Range_Domain_Maximum: 359.9 Attribute: Attribute_Label: TCD Attribute_Definition: The transect change distance - or distance of the transect along shore, in meters. Attribute_Definition_Source: U.S. Geological Survey, Woods Hole Science Center Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 34100 Attribute: Attribute_Label: MHW_LRR Attribute_Definition: For all MHW (lidar) shorelines from 1998-2014: A linear regression rate-of-change statistic was calculated by fitting a least-squares regression line to all shoreline points for a particular transect. The best-fit regression line is placed so that the sum of the squared residuals (determined by squaring the offset distance of each data point from the regression line and adding the squared residuals together) is minimized. The linear regression rate is the slope of the line. The rate is reported in meters per year with positive values indicating accretion and negative values indicating erosion. Null values are locations where there were not enough shoreline data (minimum of four shorelines) present to generate a linear regression rate of change (or any associated statistics) and are identified as 9999. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -52.67 Range_Domain_Maximum: 14.79 Attribute: Attribute_Label: MHW_LR2 Attribute_Definition: For all MHW (lidar) shorelines from 1998-2014: The R-squared statistic, or coefficient of determination, is the percentage of variance in the data that is explained by a regression. It is a dimensionless index that ranges from 1.0 to 0.0 and measures how successfully the best-fit line accounts for variation in the data. The smaller the variability of the residual values around the regression line relative to the overall variability, the better the prediction (and closer the R-squared value is to 1.0). Null values are locations where there were not enough shoreline data (minimum of four shorelines) present to generate a linear regression rate of change (or any associated statistics) and are identified as 9999. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 1 Attribute: Attribute_Label: MHW_LSE Attribute_Definition: For all MHW (lidar) shorelines from 1998-2014: The predicted (or estimated) values of y (the distance from baseline in meters) are computed for each shoreline point by using the values of x (the shoreline date) and solving the equation for the best-fit regression line (y=mx+b). The standard error is also called the standard deviation. Null values are locations where there were not enough shoreline data (minimum of four shorelines) present to generate a linear regression rate of change (or any associated statistics) and are identified as 9999. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.07 Range_Domain_Maximum: 255.87 Attribute: Attribute_Label: MHW_LCI90 Attribute_Definition: For all MHW (lidar) shorelines from 1998-2014: The standard error of the slope with confidence interval describes the uncertainty of the reported rate. The LRR rates are determined by a best-fit regression line for the shoreline data at each transect. The slope of this line is the reported rate of change (in meters/year). The confidence interval (LCI) is calculated by multiplying the standard error (also called the standard deviation) of the slope by the two-tailed test statistic at the user-specified 90 percent confidence. This value is often reported in conjunction with the slope to describe the confidence of the reported rate. For example: LRR = 1.2 LCI90 = 0.7 could be reported as a rate of 1.2 (+/-) 0.7 meters/year. Null values are locations where there were not enough shoreline data (minimum of four shorelines) present to generate a linear regression rate of change (or any associated statistics) and are identified as 9999. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.065 Range_Domain_Maximum: 127.116 Attribute: Attribute_Label: WDL_LRR Attribute_Definition: For all WDL (aerial) shorelines from 1940-2015: A linear regression rate-of-change statistic was calculated by fitting a least-squares regression line to all shoreline points for a particular transect. The best-fit regression line is placed so that the sum of the squared residuals (determined by squaring the offset distance of each data point from the regression line and adding the squared residuals together) is minimized. The linear regression rate is the slope of the line. The rate is reported in meters per year with positive values indicating accretion and negative values indicating erosion. Null values are locations where there were not enough shoreline data (minimum of four shorelines) present to generate a linear regression rate of change (or any associated statistics) and are identified as 9999. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -5.4 Range_Domain_Maximum: 11.66 Attribute: Attribute_Label: WDL_LR2 Attribute_Definition: For all WDL (aerial) shorelines from 1940-2015: The R-squared statistic, or coefficient of determination, is the percentage of variance in the data that is explained by a regression. It is a dimensionless index that ranges from 1.0 to 0.0 and measures how successfully the best-fit line accounts for variation in the data. The smaller the variability of the residual values around the regression line relative to the overall variability, the better the prediction (and closer the R-squared value is to 1.0). Null values are locations where there were not enough shoreline data (minimum of four shorelines) present to generate a linear regression rate of change (or any associated statistics) and are identified as 9999. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: .99 Attribute: Attribute_Label: WDL_LSE Attribute_Definition: For all WDL (aerial) shorelines from 1940-2015: The predicted (or estimated) values of y (the distance from baseline in meters) are computed for each shoreline point by using the values of x (the shoreline date) and solving the equation for the best-fit regression line (y=mx+b). The standard error is also called the standard deviation. Null values are locations where there were not enough shoreline data (minimum of four shorelines) present to generate a linear regression rate of change (or any associated statistics) and are identified as 9999. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3.84 Range_Domain_Maximum: 153.33 Attribute: Attribute_Label: WDL_LCI90 Attribute_Definition: For all WDL (aerial) shorelines from 1940-2015: The standard error of the slope with confidence interval describes the uncertainty of the reported rate. The LRR rates are determined by a best-fit regression line for the shoreline data at each transect. The slope of this line is the reported rate of change (in meters/year). The confidence interval (LCI) is calculated by multiplying the standard error (also called the standard deviation) of the slope by the two-tailed test statistic at the user-specified 90 percent confidence. This value is often reported in conjunction with the slope to describe the confidence of the reported rate. For example: LRR = 1.2 LCI90 = 0.7 could be reported as a rate of 1.2 (+/-) 0.7 meters/year. Null values are locations where there were not enough shoreline data (minimum of four shorelines) present to generate a linear regression rate of change (or any associated statistics) and are identified as 9999. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.101 Range_Domain_Maximum: 8.453 Attribute: Attribute_Label: ALL_LRR Attribute_Definition: For all WDL (aerial) and MHW (lidar) shorelines from 1940-2015: A linear regression rate-of-change statistic was calculated by fitting a least-squares regression line to all shoreline points for a particular transect. The best-fit regression line is placed so that the sum of the squared residuals (determined by squaring the offset distance of each data point from the regression line and adding the squared residuals together) is minimized. The linear regression rate is the slope of the line. The rate is reported in meters per year with positive values indicating accretion and negative values indicating erosion. Null values are locations where there were not enough shoreline data (minimum of four shorelines) present to generate a linear regression rate of change (or any associated statistics) and are identified as 9999. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -19.57 Range_Domain_Maximum: 11.15 Attribute: Attribute_Label: AL_LR2 Attribute_Definition: For all WDL (aerial) and MHW (lidar) shorelines from 1940-2015: The R-squared statistic, or coefficient of determination, is the percentage of variance in the data that is explained by a regression. It is a dimensionless index that ranges from 1.0 to 0.0 and measures how successfully the best-fit line accounts for variation in the data. The smaller the variability of the residual values around the regression line relative to the overall variability, the better the prediction (and closer the R-squared value is to 1.0). Null values are locations where there were not enough shoreline data (minimum of four shorelines) present to generate a linear regression rate of change (or any associated statistics) and are identified as 9999. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 1 Attribute: Attribute_Label: ALL_LSE Attribute_Definition: For all WDL (aerial) and MHW (lidar) shorelines from 1940-2015: The predicted (or estimated) values of y (the distance from baseline in meters) are computed for each shoreline point by using the values of x (the shoreline date) and solving the equation for the best-fit regression line (y=mx+b). The standard error is also called the standard deviation. Null values are locations where there were not enough shoreline data (minimum of four shorelines) present to generate a linear regression rate of change (or any associated statistics) and are identified as 9999. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3.52 Range_Domain_Maximum: 186.54 Attribute: Attribute_Label: ALL_LCI90 Attribute_Definition: For all WDL (aerial) and MHW (lidar) shorelines from 1940-2015: The standard error of the slope with confidence interval describes the uncertainty of the reported rate. The LRR rates are determined by a best-fit regression line for the shoreline data at each transect. The slope of this line is the reported rate of change (in meters/year). The confidence interval (LCI) is calculated by multiplying the standard error (also called the standard deviation) of the slope by the two-tailed test statistic at the user-specified 90 percent confidence. This value is often reported in conjunction with the slope to describe the confidence of the reported rate. For example: LRR = 1.2 LCI90 = 0.7 could be reported as a rate of 1.2 (+/-) 0.7 meters/year. Null values are locations where there were not enough shoreline data (minimum of four shorelines) present to generate a linear regression rate of change (or any associated statistics) and are identified as 9999. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.079 Range_Domain_Maximum: 74.314 Attribute: Attribute_Label: Shape_Leng Attribute_Definition: Length of feature in meter units. Attribute_Definition_Source: Esri Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1499.99999638 Range_Domain_Maximum: 1500.00000366 Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: Florida Postal_Code: 33701 Country: US Contact_Voice_Telephone: (727)-502-8000 Contact_Electronic_Mail_Address: rehenderson@usgs.gov Resource_Description: Transects_OpenOcean.shp 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. Any use of trade, product, or firm 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: WinZip Format_Version_Number: 9.0 Format_Specification: Esri polyline shapefile Format_Information_Content: This WinZip file contains polyline shapefiles of of DSAS generated shore normal transects for the open-ocean shoreline from 1940-2014 for Dauphin Island, Alabama. File_Decompression_Technique: Use WinZip or pkUnzip Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-F7T43RB5/data/Transects_OpenOcean.zip Fees: None Metadata_Reference_Information: Metadata_Date: 20201013 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Rachel Henderson Contact_Address: Address_Type: mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: Florida Postal_Code: 33701 Country: US Contact_Voice_Telephone: (727)-502-8000 Contact_Electronic_Mail_Address: rehenderson@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time