Accomack County: Access Structures 2016

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator:

Sharon Killeen, Coastal Inventory Program, Center For Coastal Resources Management, VIMS, GIS Programmer/Analyst

Publication_Date: 20160930

Title: Accomack County: Access Structures 2016

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 1970s 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 of the 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 report continues the process which updates and expands earlier reports. Data collected describes conditions in the immediate riparian zone, the bank, and along the shore.

Purpose: To inventory Virginia's tidal shoreline conditions.

Supplemental_Information:

There are five shapefiles assocaited with Accomack County Inventory database: AccomackCo_lubc_2016,AccomackCo_astru_2016, Accomack Co_sstru_2016, AccomackCo_tm_2016, and AccomackCo_beaches_2016. AccomackCo_lubc_2016 (land use and bank cover for Accomack County) is a linear shapefile containing data about land use, tree fringe, bank height, bank cover, bank stability and beach status along the shoreline. AccomackCo_sstru_2016 ( Accomack County shoreline structures) is a linear shapefile delineating hard structures in place at the shoreline (bulkhead, dilapidated bulkhead, riprap, wharf, unconentional, debris, marina < 50 slips, marina > 50 slips, jetty, marsh toe revetment, groinfield and breakwaters). AccomackCo_astru_2016 (Accomack County access structures) is a point shapefile with locations of docks, dilapidated docks, boathouses, and private and public boat ramps. Accomack County is unusual in there are many piers off of Tangier Island that have no mainland attached. These piers will be off shore but counted as access structures. AccomackCo_tm_2016 (Accomack County tidal marshes) shows the location, size, species and type of tidal marshes in Accomack County. AccomackCo_beaches_2016 is a linear shapefile showing the presence of beaches on the shoreline of Accomack County. The attributes of these five shapefiles are explained in the Entity and Attribute Information section below.

Status:

Progress: Complete

Maintenance_and_Update_Frequency: Unknown

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -76.000292

East_Bounding_Coordinate: -75.332941

North_Bounding_Coordinate: 38.007194

South_Bounding_Coordinate: 37.477118

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword:

Land use, Land cover, Shoreline conditions, Shoreline structures, Hardened structures, Access structures, Riparian land use, Shoreline Inventory

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Categories

Theme_Keyword: farming

Theme_Keyword: boundaries

Theme_Keyword: elevation

Theme_Keyword: inlandWaters

Theme_Keyword: location

Theme_Keyword: structure

Place:

Place_Keyword_Thesaurus: None

Place_Keyword:

Pocomoke River, Pocomoke Sound,Messongo Creek,Cattail Creek, Guilford Creek, The Thorofare, Chesconessex Creek,Onancock Creek,Pungoteague Creek,Nandua Creek,Occohannock Creek, Chesapeake Bay

Access_Constraints: None

Use_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.The Comprehensive Coastal Inventory Program (CCI) at VIMS performs a service by distributing data generated by either CCI or public agencies which offer data without restriction or charge. CCI assumes no responsibility for data accuracy or precision, metadata completeness or correctness for digital information. CCI assumes no liability for misuse of any data which may arise as a result of any alteration, conversion, or combination with other data sources. As well, the timeliness and scale of these products must be considered when evaluating appropriate use.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

Coastal Inventory Program, Center For Coastal Resources Management, VIMS

Contact_Person: Sharon Killeen

Contact_Position: GIS Programmer/Analyst

Contact_Address:

Address_Type: mailing and physical

Address: 1375 Greate Road, P.O.Box 1346

City: Gloucester Point

State_or_Province: Virginia

Postal_Code: 23062

Country: US

Contact_Voice_Telephone: 804-684-7534

Contact_Facsimile_Telephone: 804-684-7179

Contact_Electronic_Mail_Address: sharon@vims.edu

Native_Data_Set_Environment:

Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.4.0.5524

Data_Quality_Information:

Lineage:

Process_Step:

Process_Description:

A shoreline for Accomack County was created using the 2013 VBMP imagery as a backdrop and using ArcGis version 10.2. Using this as a baseline the shoreline inventory was remotely generated using two sources: Google Earth 2015 imagery , and 2013 high resolution imagery available through Bing Maps and 2013 high resolution imagery available from the Virginia Base Mapping Program (VBMP). The shoreline was coded for land use, bank height, bank condition, bank cover and the presence or absence of beach, access structures and hardened structures.

Process_Date: 20160130

Process_Step:

Process_Description:

All processing steps for the shoreline inventory were generated using ArcGIS - ArcMap v10.2.2 while viewing conditions observed in 2015 Bing high resolution oblique imagery and 2013 imagery from the Virginia Base Mapping Program (VBMP). Using the latest VBMP 2013 imagery as a background, conditions visible on shore were used to code a digital shoreline created using VBMP 2013 imagery at a scale of 1:1000. Conditions were also verified using Bing Birds Eye, VBMP 2011, and VBMP 2009 imagery. For the land use/bank cover shapefile arcs were split and coded for land use, bank height, bank cover, tree fringe and presence or absence of beach, for the access structure shapefile arcs were coded for dock, dilapidated dock, boathouse, and public and private ramps, for the shoreline structure shapefile arcs were coded for bulkhead, delapidated bulkhead, riprap, unconventional, debris, wharf, breakwater, groinfield, jetty, marsh toe revetment and marina >50 and <50 slips.

Process_Date: 20160630

Process_Step:

Process_Description:

The first and second step in the QAQC process involves complete checks of shoreline coding by a GIS Programmer/Analyst and a Marine Scientist.

Process_Date: 20160831

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Entity point

Point_and_Vector_Object_Count: 1915

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name: NAD 1983 UTM Zone 18N

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.9996

Longitude_of_Central_Meridian: -75.0

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: 0.000000002220024164500956

Ordinate_Resolution: 0.000000002220024164500956

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: AccomackCo_astru_2016

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: PNTSTRU

Attribute_Definition:

Access structure type: Dock, Dilapidated Dock, Boathouse, Private Ramp and Public Ramp. Structures that allow access to the water.

Attribute_Definition_Source:

VIMS Shoreline & Tidal Marsh Inventory Glossary, Center for Coastal Resources Management

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Dock/Pier

Enumerated_Domain_Value_Definition:

In this survey, a dock or pier is a structure, generally constructed of wood, which is built perpendicular or parallel to the shore. These are typical on private property, particularly residential areas. However, there are exceptions where they are used in working waterfront communities, and may be disconnected from the shore. In general docks provide access to the water, a mooring for vessels, and a venue for recreational activities. They are mapped as point features. Pier length is not surveyed.

Enumerated_Domain_Value_Definition_Source:

VIMS Shoreline & Tidal Marsh Inventory Glossary, Center for Coastal Resources Management

Enumerated_Domain:

Enumerated_Domain_Value: Dilapidated Dock

Enumerated_Domain_Value_Definition:

A pier which has failed due to deterioration from age or storm damage is classified as a dilapidated pier. The remnants of this structure may be original pilings only.

Enumerated_Domain_Value_Definition_Source:

VIMS Shoreline & Tidal Marsh Inventory Glossary, Center for Coastal Resources Management

Enumerated_Domain:

Enumerated_Domain_Value: Private Ramp

Enumerated_Domain_Value_Definition:

Boat ramps are used to launch vessels of all types. They are usually constructed of concrete, but wood and gravel ramps are also found. Point identification of boat ramps does not discriminate based on type, size, material, or quality of the launch. This inventory attempts to distinguish, when possible, private versus public ramps. Ramps located in privately owned, commercial marinas and residential communities are classified as private.

Enumerated_Domain_Value_Definition_Source:

VIMS Shoreline & Tidal Marsh Inventory Glossary, Center for Coastal Resources Management

Enumerated_Domain:

Enumerated_Domain_Value: Public Ramp

Enumerated_Domain_Value_Definition:

Boat ramps are used to launch vessels of all types. They are usually constructed of concrete, but wood and gravel ramps are also found. Point identification of boat ramps does not discriminate based on type, size, material, or quality of the launch. This inventory attempts to distinguish, when possible, private versus public ramps. Ramps located in privately owned, commercial marinas and residential communities are classified as private.

Enumerated_Domain_Value_Definition_Source:

VIMS Shoreline & Tidal Marsh Inventory Glossary, Center for Coastal Resources Management

Enumerated_Domain:

Enumerated_Domain_Value: Boathouse

Enumerated_Domain_Value_Definition:

A boathouse is considered any covered structure alongside a dock or pier built to cover a boat. They include true “houses” for boats with roof and siding, as well as awnings that offer only overhead protection. Since nearly all boathouses have adjoining piers, piers are not surveyed separately, but are assumed. Boathouses may be difficult to see in aerial photography.

Enumerated_Domain_Value_Definition_Source:

VIMS Shoreline & Tidal Marsh Inventory Glossary, Center for Coastal Resources Management

Attribute:

Attribute_Label: Inv_Update

Metadata_Reference_Information:

Metadata_Date: 20160929

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

Coastal Inventory Program, Center For Coastal Resources Management, VIMS

Contact_Person: Sharon Killeen

Contact_Position: GIS Programmer/Analyst

Contact_Address:

Address_Type: mailing and physical

Address: 1375 Greate Road, P.O.Box 1346

City: Gloucester Point

State_or_Province: Virginia

Postal_Code: 23062

Country: US

Contact_Voice_Telephone: 804-684-7534

Contact_Facsimile_Telephone: 804-684-7179

Contact_Electronic_Mail_Address: sharon@vims.edu

Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time