DelmarvaN_baseline.shp - Offshore baseline for Delmarva North coastal region generated to calculate shoreline change rates from Cape Henlopen, Delaware to the southern end of Assateague Island, Virginia

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: U.S. Geological Survey

Publication_Date: 2010

Title:

DelmarvaN_baseline.shp - Offshore baseline for Delmarva North coastal region generated to calculate shoreline change rates from Cape Henlopen, Delaware to the southern end of Assateague Island, Virginia

Geospatial_Data_Presentation_Form: vector digital data

Series_Information:

Series_Name: Open-File Report

Issue_Identification: 2010-1119

Publication_Information:

Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA

Publisher: U.S. Geological Survey, Coastal and Marine Geology Program

Online_Linkage: <https://pubs.usgs.gov/of/2010/1119/>

Larger_Work_Citation:

Citation_Information:

Originator: Emily Himmelstoss

Originator: Meredith Kratzmann

Originator: Cheryl Hapke

Originator: E. Robert Thieler

Originator: Jeffrey List

Publication_Date: 2010

Title:

National Assessment of Shoreline Change: A GIS Compilation of Vector Shorelines and Associated Shoreline Change Data for the New England and Mid-Atlantic Coasts

Series_Information:

Series_Name: Open-File Report

Issue_Identification: 2010-1119

Publication_Information:

Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA

Publisher: U.S. Geological Survey, Coastal and Marine Geology Program

Online_Linkage: <https://pubs.usgs.gov/of/2010/1119/>

Description:

Abstract:

Sandy ocean beaches are a popular recreational destination, often surrounded by communities containing valuable real estate. Development is on the rise despite the fact that coastal infrastructure is subjected to flooding and erosion. As a result, there is an increased demand for accurate information regarding past and present shoreline changes. To meet these national needs, the Coastal and Marine Geology Program of the U.S. Geological Survey (USGS) is compiling existing reliable historical shoreline data along open-ocean sandy shores of the conterminous United States and parts of Alaska and Hawaii under the National Assessment of Shoreline Change project.

There is no widely accepted standard for analyzing shoreline change. Existing shoreline data measurements and rate calculation methods vary from study to study and prevent combining results into state-wide or regional assessments. The impetus behind the National Assessment project was to develop a standardized method of measuring changes in shoreline position that is consistent from coast to coast. The goal was to facilitate the process of periodically and systematically updating the results in an internally consistent manner.

Purpose:

This dataset includes a reference baseline used by the Digital Shoreline Analysis System (DSAS) to calculate rate-of-change statistics for the Delmarva North region from Cape Henlopen, Delaware to the southern end of Assateague Island, Virginia. This baseline layer serves as the starting point for all transects cast by the DSAS application. The transects intersect each shoreline and establish measurement points used to calculate shoreline-change rates.

Rates of long-term and short-term shoreline change were generated in a GIS using the DSAS version 4.1- An ArcGIS extension for calculating shoreline change: U.S. Geological Survey Open-File Report 2008-1278, Thieler, E.R., Himmelstoss, E.A., Zichichi, J.L., and Ergul, Ayhan.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2010

Currentness_Reference: publication date

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -75.419152

East_Bounding_Coordinate: -75.046925

North_Bounding_Coordinate: 38.806040

South_Bounding_Coordinate: 37.845021

Keywords:

Theme:

Theme_Keyword_Thesaurus: General

Theme_Keyword: Baseline

Theme_Keyword: Shoreline Change Rate

Theme_Keyword: Linear Regression Rate

Theme_Keyword: Endpoint Rate

Theme_Keyword: Digital Shoreline Analysis System

Theme_Keyword: DSAS

Theme_Keyword: U.S. Geological Survey

Theme_Keyword: USGS

Theme_Keyword: Coastal and Marine Geology Program

Theme_Keyword: CMGP

Theme_Keyword: Woods Hole Coastal and Marine Science Center

Theme_Keyword: WHCMSC

Theme_Keyword: National Assessment of Shoreline Change Project

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category

Theme_Keyword: oceans

Theme_Keyword: oceans and estuaries

Theme_Keyword: oceans and coastal

Theme_Keyword: environment

Theme_Keyword: geoscientificInformation

Place:

Place_Keyword_Thesaurus: General

Place_Keyword: Atlantic Coast

Place_Keyword: United States

Place_Keyword: Mid-Atlantic

Place_Keyword: Delmarva

Place_Keyword: Delaware

Place_Keyword: Rehoboth Beach

Place_Keyword: Bethany Beach

Place_Keyword: Maryland

Place_Keyword: Ocean City

Place_Keyword: Assateague Island

Place_Keyword: Virginia

Place_Keyword: Chincoteague Island

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 as the originator of the dataset.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

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: 508-547-2310

Native_Data_Set_Environment:

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.1850

Cross_Reference:

Citation_Information:

Originator: Cheryl Hapke

Originator: Emily Himmelstoss

Originator: Meredith Kratzmann

Originator: Jeffrey List

Originator: E. Robert Thieler

Publication_Date: 2010

Title:

National Assessment of Shoreline Change: Historical Shoreline Change along the New England and Mid-Atlantic Coasts

Series_Information:

Series_Name: Open-File Report

Issue_Identification: 2010-1118

Publication_Information:

Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA

Publisher: U.S. Geological Survey, Coastal and Marine Geology Program

Online_Linkage: <https://pubs.usgs.gov/of/2010/1118/>

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

Other_Citation_Details: Current version of software at time of use was 4.1

Online_Linkage: <https://pubs.usgs.gov/of/2008/1278/>

Online_Linkage:

<http://woodshole.er.usgs.gov/project-pages/dsas/version4/>

Online_Linkage: <http://woodshole.er.usgs.gov/project-pages/dsas/>

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

The attribute in this layer is based on the requirements for use within the Digital Shoreline Analysis System (DSAS) software (USGS Open-File Report 2008-1278). The data have been quality checked and the attribute value (ID) increments sequentially alongshore.

Logical_Consistency_Report:

All polylines have a unique identification attribute (ID) used to designate the alongshore order of baselines. Adjacent baseline segments do not overlap and are not necessarily continuous.

Completeness_Report:

This baseline file is complete and contains all baseline segments used to cast transects along sections of the Delmarva North coastal region where lidar shoreline position data were available and additional shoreline data are present to calculate either a short- or long-term rate.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

The baseline serves as a reference point for transects cast by the Digital Shoreline Analysis System (DSAS) software. It does not correspond to any real-world feature.

Lineage:

Process_Step:

Process_Description:

A baseline was constructed offshore from the time series of shoreline positions using standard editing tools in ArcMap v.9.3. The baseline was positioned to conform to changes in the combined orientation of the shorelines alongshore. This was done so that the transects, which are generated by the Digital Shoreline Analysis System v4.1 from the baseline, would intersect perpendicular to the general trend of the shorelines. Baseline features were constructed along sections of the coast containing sandy shoreline features greater than 1 kilometer in length that met at least one of the following requirements: 1) they contained the two shorelines required to compute short-term (~30 year) shoreline change analysis (typically a shoreline from the 1970-1980's and the lidar-derived shoreline from 1997 or 2000); or 2) they contain at least four shorelines, one of which must be the lidar-derived shoreline, that can be used to compute long-term (~100 year) shoreline change rates. This process step and all subsequent process steps were performed by the same person: Emily Himmelstoss.

Process_Date: 2009

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Emily Himmelstoss

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

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 x2262

Contact_Facsimile_Telephone: 508-457-2310

Contact_Electronic_Mail_Address: ehimmelstoss@usgs.gov

Process_Step:

Process_Description:

The baseline feature class was exported from a personal geodatabase to a shapefile in ArcCatalog (v.9.3) by performing a right-mouse click on the data layer > export > to shapefile (single).

Process_Date: 20100216

Process_Step:

Process_Description:

The baseline shapefile was projected in ESRI's ArcToolbox (v.9.3) > Data Management Tools > Projections and Transformations > Feature > Project. Parameters: input projection - UTM zone 18N (NAD 83); output projection - geographic coordinates (WGS 84); transformation - NAD_1983_To_WGS_1984_1.

Process_Date: 20100216

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: 4

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.000001

Longitude_Resolution: 0.000001

Geographic_Coordinate_Units: Decimal degrees

Geodetic_Model:

Horizontal_Datum_Name: D_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: DelmarvaN_baseline

Entity_Type_Definition:

Reference baseline used by the Digital Shoreline Analysis System (DSAS) to calculate rate-of-change statistics

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: ID

Attribute_Definition:

Field required by the Digital Shoreline Analysis System (DSAS) software. DSAS uses this value to determine the ordering sequence of transects when the baseline feature contains multiple segments. Individual segments are numbered sequentially alongshore.

Attribute_Definition_Source: U.S. Geological Survey

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1

Range_Domain_Maximum: 4

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

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

Resource_Description: Downloadable Data

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 the baseline shapefile for use generating transects within the Digital Shoreline Analysis System for the Delmarva North region from Cape Henlopen, Delaware to the southern end of Assateague Island, Virginia.

File_Decompression_Technique: Use WinZip or pkUnzip

Transfer_Size: 0.001

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: <https://pubs.usgs.gov/of/2010/1119/data/DelmarvaN_baseline.zip>

Access_Instructions: Data are downloadable via the World Wide Web (WWW).

Fees: None

Technical_Prerequisites:

This zip file contains data available in Environmental Systems Research Institute (ESRI) polyline shapefile format. The user must have ArcGIS or ArcView 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing the data. A free data viewer, ArcExplorer, capable of displaying the data is available from ESRI at www.esri.com.

Metadata_Reference_Information:

Metadata_Date: 20100428

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Emily Himmelstoss

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

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 x2262

Contact_Facsimile_Telephone: 508-547-2310

Contact_Electronic_Mail_Address: ehimmelstoss@usgs.gov

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time

Metadata_Extensions:

Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>

Profile_Name: ESRI Metadata Profile