Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 2010 Title: DelmarvaS_SVA_baseline.shp - Offshore baseline for the Delmarva South/Southern Virginia region generated to calculate shoreline change rates from Wallops Island, Virginia to the Virginia/North Carolina border. 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: http://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: http://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 South/Southern Virginia region from Wallops Island, Virginia to the Virginia/North Carolina border. 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: -75.991630 East_Bounding_Coordinate: -75.420917 North_Bounding_Coordinate: 37.875581 South_Bounding_Coordinate: 36.550712 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: Virginia Place_Keyword: Wallops Island Place_Keyword: Assawoman Island Place_Keyword: Metompkin Island Place_Keyword: Cedar Island Place_Keyword: Parramore Island Place_Keyword: Hog Island Place_Keyword: Cobb Island Place_Keyword: Wreck Island Place_Keyword: Ship Shoal Island Place_Keyword: Myrtle Island Place_Keyword: Smith Island Place_Keyword: Fishermans Island Place_Keyword: Cape Henry Place_Keyword: Virginia Beach Place_Keyword: False Cape 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: http://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: http://pubs.usgs.gov/of/2008/1278/ Online_Linkage: http://woodshole.er.usgs.gov/project-pages/dsas/version4/index.html 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 South and Southern Virginia 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 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: 13 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: DelmarvaS_SVA_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: 13 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 South/Southern Virginia region from Wallops Island, Virginia to the Virginia/North Carolina border. File_Decompression_Technique: Use WinZip or pkUnzip Transfer_Size: 0.001 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/2010/1119/data/DelmarvaS_SVA_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