York County Shoreline Structures (yorkco_sstru_13)

Metadata also available as

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator:
Comprehensive Coastal Inventory, Virginia Institute of Marine Science
Publication_Date: 2013
Title: York County Shoreline Structures (yorkco_sstru_13)
Geospatial_Data_Presentation_Form: vector digital data
Online_Linkage:
<http://ccrm.vims.edu//gis_data_maps/shoreline_inventories/index.html>
Description:
Abstract:
Shoreline Situation Reports (SSR) were first generated by VIMS in the 1970's to report the condition and status of the shore lands. The SSR series were published in hardcopy on a county by county basis for each Tidewater Virginia localities. The reports were intended to assist planners, managers, and regulators in decisions pertaining to management of coastal areas and natural resources therein. This Shoreline Inventory report continues a process which updates and expands the earlier reports. Data collected reports conditions surveyed in the immediate riparian zone, the bank, and along the shoreline.
Purpose: To inventory Virginia's tidal shoreline conditions.
Supplemental_Information:
There are four shapefiles that are part of the 2013 York County Shoreline Inventory database: yorkco_lubc_13, yorkco_astru_13, yorkco_sstru and yorkco_tm_2013. Yorkco_lubc_13 (land use and bank cover for York County) is a linear shapefile containing data about land use, tree fringe, bank height, bank cover, erosion, and beach status along the shoreline. Yorkco_sstru _13 (York County shoreline structures) is a linear shapefile delineating hard structures in place at the shoreline (bulkhead, breakwater,debris, dilapidated bulkhead, riprap, jetty, marina, marsh toe revetment, wharf, unconventional, groinfields). Yorkco_astru _13 (York County access structures) is a point shapefile with locations of docks, public and private ramps, dilapidated docks, and boathouses.Yorkco_tm_2013 is a polygon shapefile delineating tidal marshes in York County The attributes of these four shapefiles are explained in the Entity and Attribute Information section below.
Time_Period_of_Content:
Time_Period_Information:
Multiple_Dates/Times:
Currentness_Reference:
With the exception of the tidal marsh inventory, the currentness of this product is coincident with the year(s) of the images used in the data development phase. Tidal marshes also used comparable image year classes but were ground-truthed.
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -76.710395
East_Bounding_Coordinate: -76.381903
North_Bounding_Coordinate: 37.373679
South_Bounding_Coordinate: 37.088003
Keywords:
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: Erosion control structures
Theme_Keyword: Access structures
Theme_Keyword: Shoreline conditions
Theme_Keyword: Shoreline Inventory
Place:
Place_Keyword_Thesaurus: none
Place_Keyword: Virginia
Place_Keyword: Chesapeake Bay
Place_Keyword: York County
Place_Keyword: Back River
Place_Keyword: Bay Tree Creek
Place_Keyword: Carter Creek
Place_Keyword: Chisman Creek
Place_Keyword: Felgates Creek
Place_Keyword: Goodwin Islands
Place_Keyword: Indian Creek
Place_Keyword: King Creek
Place_Keyword: Poquoson River
Place_Keyword: Queen Creek
Place_Keyword: Skimino Creek
Place_Keyword: Wormley Creek
Place_Keyword: York River
Place_Keyword: Back Creek
Access_Constraints:
These data should not be used for jurisdictional permit determinations beyond providing general shoreline condition or status information. These data have not been surveyed to property boundaries.
Use_Constraints: none
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Marcia Berman
Contact_Organization: Virginia Institute of Marine Science (VIMS)
Contact_Position: Director of Comprehensive Coastal Inventory Program
Contact_Address:
Address_Type: mailing address
Address: P.O.Box 1346
City: Gloucester Point
State_or_Province: Virginia
Postal_Code: 23062
Country: USA
Contact_Voice_Telephone: 804-684-7188
Contact_Facsimile_Telephone: 804-684-7179
Contact_Electronic_Mail_Address: marcia@vims.edu
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.3000
Data_Quality_Information:
Logical_Consistency_Report:
Chain-node topology present. Linear coverages were built for lines and point coverages were built for points.
Completeness_Report:
All shoreline for York County was coded remotely using high resolution oblique imagery.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The York County shoreline inventory done in 2009 recorded shoreline attributes with a GPS unit as the boat moved along the shoreline with a horizontal accuracy of +/- 5 meters. Data was transferred from the GPS boat track to an existing digital shoreline coverage by projecting data to the shoreline at a 90 degree angle from the boat track. Rectified imagery were used as a background coverage to aid in data positioning. Land use features were placed along the shore so changes in land use were coincident with changes illustrated in the imagery. Positional accuracy for data that has been corrected with imagery which has a resolution of 2 meters or better. Accuracy limits of the field collected data, however, are set at 5 meters due to the short occupancy of GPS units. In many cases the image correction yields a final positional accuracy much closer to 2 meters or less, depending on image resolution. For the York County 2013 Shoreline Inventory the shoreline was coded remotely using recent high resolution color infra-red and natural color imagery with a resolution of 1 meter or better along with Bing oblique imagery to identify and code the shoreline for shoreline attributes.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator:
Commonwealth of Virginia, through the Virginia Geographic Information Network (VGIN) of the Virginia Information Technology Agency (VITA)
Title: Virginia Base Mapping Program (VBMP)
Publication_Information:
Publication_Place: Richmond, Virginia
Publisher: Virginia Geographic Information Network
Source_Time_Period_of_Content:
Time_Period_Information:
Multiple_Dates/Times:
Process_Step:
Process_Description:
The original 2009 York County Shoreline Inventory was developed using these techniques: data was collected by a two-person field crew (one person collecting land use and bank condition data and one boat operator also collecting shoreline features) using two hand-held Trimble GeoExplorers GPS Units, while navigating along the shoreline. A data dictionary designed for the inventory was installed on each GPS Unit. One data collector records natural features including land use, bank height, presence of marsh or beach, and shoreline stability. A second person collects data on the hardened structures: riprap, bulkheads, docks, boatramps, etc. Point features (docks, boathouses, ramps) were surveyed with a six second observation recorded at 1 reading/second. Linear features were surveyed kinematically at a rate of one observation every 3 seconds.
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Sharon Killeen
Contact_Organization:
Comprehensive Coastal Inventory, Virginia Institute of Marine Science
Contact_Position: Senior Programmer/Analyst
Contact_Address:
Address_Type: mailing and physical address
Address: P.O.Box 1346 Greate Road
City: Gloucester Point
State_or_Province: Virginia
Postal_Code: 23062
Country: USA
Contact_Voice_Telephone: 804-684-7534
Contact_Facsimile_Telephone: 804-684-7179
Contact_Electronic_Mail_Address: sharon@vims.edu
Process_Step:
Process_Description:
Data from the GPS units were postprocessed on a PC with Trimble Pathfinder Office software. Postprocessing includes differential correction using base station data collected at the VIMS laboratory. Corrected data is converted to shapefiles for further processing.
Process_Step:
Process_Description:
In the ArcMap environment, boat-track arcs were manually shifted to the base shoreline (VBMP). Arcs were split and moved to locations on the shoreline perpendicular to the original locations on the boat-track. Shoreline arc segments were coded, and the shapefiles were visually checked for attribute accuracy between coded shoreline and boat-track data.
Process_Step:
Process_Description:
In ArcMap, boat-track points were manually shifted to the base shoreline (VBMP). Points were moved to locations on the shoreline perpendicular to the original locations on the boat-track. Points were coded and the access structure (astru) was visually checked for attribute accuracy between coded shoreline and boat-track data.
Process_Step:
Process_Description:
In ArcMap, boat-track points were manually shifted to the base shoreline (VBMP). Points were moved to locations on the shoreline perpendicular to the original locations on the boat-track. Points were coded and the access structure (astru) was visually checked for attribute accuracy between coded shoreline and boat-track data.
Process_Step:
Process_Description:
The 2009 York County Shoreline Inventory was updated for the 2013 York County Shoreline Inventory using on-screen, digitizing techniques in ArcMap ArcGis 10. The 1998, 2005 and 2007 data served as the baseline for the updates. These data were updated with any observable changes identified from the updated imagery. High resolution oblique imagery available through Bing and VBMP 2011 imagery provided the source data that allowed the inventory to be updated without additional field work. Bing imagery provides an excellent platform to assess changes in land use, presence of erosion control structures, and the location of private/public docks, boathouses, marinas, and boat ramps. The imagery is less suited to accurately assess changes in bank height or bank condition. By and large, these characteristics are relatively stable over time; the exception being areas with extreme exposure that may have been subject to intense storms since the original survey.
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Sharon Killeen
Contact_Organization:
Comprehensive Coastal Inventory Program, Viginia Institute of Marine Science
Contact_Position: GIS Programmer/Analyst
Contact_Address:
Address_Type: mailing and physical address
Address: P.O. Box 1346 Greate Road
City: Gloucester Point
State_or_Province: Virginia
Postal_Code: 23062
Country: USA
Contact_Voice_Telephone: 804-684-7534
Contact_Facsimile_Telephone: 804-684-7179
Contact_Electronic_Mail_Address: sharon@vims.edu
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.000000
Ordinate_Resolution: 0.000000
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: yorkco_sstru_13
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: LENGTH
Attribute_Definition: Applies to structure
Attribute:
Attribute_Label: STRUCTURE
Attribute_Definition:
erosion control conditions at the shoreline: breakwater, bulkhead, dilapidated bulkhead, debris, groinfield, jetty, marina, marina >50 slips, marina <50 slips, marsh toe revetment,riprap, unconventional
Attribute:
Attribute_Label: Inv_update
Attribute_Definition: Dates of Imagery used
Distribution_Information:
Resource_Description: Downloadable Data
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: Shapefile
Transfer_Size: 1.766
Metadata_Reference_Information:
Metadata_Date: 20131203
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Sharon Killeen
Contact_Organization:
Comprehensive Coastal Inventory, Virginia Institute of Marine Science
Contact_Position: GIS Programmer/Analyst
Contact_Address:
Address_Type: mailing and physical address
Address: P.O.Box 1346 Greate Road
City: Gloucester Point
State_or_Province: Virginia
Postal_Code: 23062
Country: USA
Contact_Voice_Telephone: 804-684-7534
Contact_Facsimile_Telephone: 804-684-7179
Contact_Electronic_Mail_Address: sharon@vims.edu
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Generated by mp version 2.9.6 on Wed Dec 04 11:06:07 2013