Virginia Shoreline Inventory - Shoreline Structures

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Comprehensive Coastal Inventory, Virginia Institute of Marine Science
Publication_Date: 2009
Title:
Virginia Shoreline Inventory - Shoreline Structures
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publication_Place: Gloucester Point, Virginia
Publisher: Virginia Institute of Marine Science
Other_Citation_Details:
For shoreline inventories by county, please visit http://ccrm.vims.edu/gis_data_maps/shoreline_inventories/index.html
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.
This dataset is the result of combining the most recent digital shoreline inventories for Virginia.
Purpose:
To inventory Virginia's tidal shoreline conditions.
Supplemental_Information:
There are three shapefiles that are part of the Shoreline Inventory database: *_lubc, *_astru, *_sstru. The _lubc (land use and bank cover) is a linear shapefile containing data about land use, bank height, erosion, bank cover, Phragmites australis, tree fringe, canopy overhang, marsh, and beach status along the shoreline. The _sstru (shoreline structures) is a linear shapefile delineating hard structures at the shoreline (bulkhead, breakwater, dilapidated bulkhead, debris, jetty, marina, marsh toe revetment, unconventional, riprap, groin fields). The _astru (access structures) is a point shapefile with locations of docks, ramps,a dilapidated docks, outfalls, and boathouses. The attributes of these three shapefiles are explained in the Entity and Attribute Information section below.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1998
Ending_Date: 2009
Currentness_Reference:
ground condition at time of survey
Status:
Progress: Ongoing
Maintenance_and_Update_Frequency: Unknown
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -77.638282
East_Bounding_Coordinate: -75.257271
North_Bounding_Coordinate: 38.538059
South_Bounding_Coordinate: 36.690577
Keywords:
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: Shoreline conditions
Theme_Keyword: Shoreline structures
Theme_Keyword: Shoreline Inventory
Place:
Place_Keyword_Thesaurus: none
Place_Keyword: Virginia
Place_Keyword: Chesapeake Bay
Place_Keyword: Accomack County
Place_Keyword: Caroline County
Place_Keyword: City of Chesapeake
Place_Keyword: City of Portsmouth
Place_Keyword: Essex County
Place_Keyword: Gloucester County
Place_Keyword: King and Queen County
Place_Keyword: King George County
Place_Keyword: King William County
Place_Keyword: Lancaster County
Place_Keyword: Lynnhaven Bay
Place_Keyword: Mathews County
Place_Keyword: Middlesex County
Place_Keyword: New Kent Countiy
Place_Keyword: Newport News
Place_Keyword: Norfolk
Place_Keyword: Northumberland County
Place_Keyword: Poquoson
Place_Keyword: Richmond County
Place_Keyword: Stafford County
Place_Keyword: Westmoreland County
Place_Keyword: Pagan River
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.
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 (CCI)
Contact_Address:
Address_Type: P.O. Box 1346
Address:
Greate Road
City: Gloucester Point
State_or_Province: Virginia
Postal_Code: 23062
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
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The attributes were compared to original GPS data logs for accuracy.  Errors were corrected where noted.
Logical_Consistency_Report:
Chain-node topology present.  Linear coverages were built for lines and point coverages were built for points.
Completeness_Report:
All shoreline that has a minimum depth of 2 feet at mean low water was surveyed.  Some shorelines are coded remotely if access was restricted due to depth.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Shoreline structures were recorded with a GPS unit as the boat moved along the shoreline. 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 digital orthophoto quads were used as a background coverage to aid in data positioning. Dock and boathouse point data were aligned with docks on the images. 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 is  .3 meters (equivalent to image resolution). Data not visable on the imagery (bulkheads, riprap, etc.) has a positional accuracy of  11 meters. Accuracy was determined by comparing digitally processed data locations to onsite GPS ground surveys collected at random.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Comprehensive Coastal Inventory Program, Virginia Institute of Marine Science
Publication_Date: 1991
Title:
Mean High Water Shoreline Position, Virginia
Geospatial_Data_Presentation_Form: vector digital data
Source_Scale_Denominator: 24,000
Type_of_Source_Media: mylar
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1964
Ending_Date: 1987
Source_Currentness_Reference:
date of USGS map
Source_Citation_Abbreviation:
SHL
Source_Contribution:
Digital shoreline serves as base shoreline for shoreline conditions for the following counties: King and Queen, King William, Middlesex, and Poquoson.
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 1994
Title:
Digital Orthophoto Quadrangles
Geospatial_Data_Presentation_Form: remote-sensing image
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Type_of_Source_Media: color infra-red digital imagery
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1994
Source_Currentness_Reference:
ground condition
Source_Citation_Abbreviation:
DOQQ
Source_Contribution:
Serves as a background coverage in some of the map portfolios. Used to accurately position land use and cover data. Used to create a new digital shoreline coverage that serves as the base shoreline for shoreline conditions. Counties that used this shoreline: Accomack, Caroline, Essex, Lancaster, Northumberland, Richmond, and Pagan River. Counties that used this in conjunction with another shoreline: Gloucester, King and Queen, King George, King William, Middlesex, New Kent, Newport News, and Poquoson.
Source_Information:
Source_Citation:
Citation_Information:
Originator: City of Norfolk
Publication_Date: 1999
Title:
Norfolk Hydrology
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publication_Place: Norfolk, VA
Publisher: City of Norfolk
Type_of_Source_Media: digital orthophotographs
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1999
Source_Citation_Abbreviation:
City of Norfolk
Source_Contribution:
Provided the base shoreline for the City of Norfolk
Source_Information:
Source_Citation:
Citation_Information:
Originator: Commonwealth of Virginia, through Virginia Geographic Network Division of its Department of Technology Planning (VGIN)
Publication_Date: 2003
Title:
Virginia Base Map Program (VBMP)
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publication_Place: Richmond, VA
Publisher: Virginia Geographic Information Network
Source_Scale_Denominator: 4800
Type_of_Source_Media: DVD
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2002
Source_Citation_Abbreviation:
VBMP 2002
Source_Contribution:
Imagery (2002) serves as a background in the map portfolio. Imagery is used to update land use and structure data as well as to remotely code areas not previously surveyed in the field.  The VBMP shoreline was also used and adjusted using the imagery where needed. This shoreline was used in the following counties: Gloucester, Lynnhaven Bay, Stafford, and Westmoreland.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Commonwealth of Virginia, through Virginia Geographic Network Division of its Department of Technology Planning (VGIN)
Publication_Date: 2006/2007
Title:
Virginia Base Map Program Imagery and Hydrology
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publication_Place: Richmond, VA
Source_Citation_Abbreviation:
VBMP 2006/07
Source_Contribution:
Imagery (2007) serves as a background in the map portfolio. Imagery is used to update land use and structure data as well as to remotely code areas not previously surveyed in the field.  The VBMP shoreline was also used and adjusted using the imagery where needed. This shoreline was used in the following counties: City of Chesapeake, City of Portsmouth, King George, New Kent, Newport News, and Mathews.
Process_Step:
Process_Description:
Data was collected by a three-person field crew (1989-2001) or a two-person field crew (2002 to present) (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_Date: 1998 - present
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_Date: 1998 - present
Process_Step:
Process_Description:
In the ArcMap environment, boat-track arcs and points were manually shifted to the base shoreline. Arcs were split and moved to locations on the shoreline perpendicular to the original locations on the boat-track. Points were also moved to locations on the shoreline perpendicular to the original locations on the boat-track.  Shoreline arc segments and points were coded, and the shapefiles were visually checked for attribute accuracy between coded shoreline and boat-track data.
Process_Date: 1998 - present
Process_Step:
Process_Description:
Land use, point structure, and linear structure locations were digitally checked and repositioned if necessary with imagery displayed in the background. This was done using ArcMap capabilities. Areas inaccessible by boat due to low tide were coded based on features observed on the imagery. The "remote" coded areas were given the item REMOTE = "yes" to distinquish them from GPS collected data.
Process_Date: 1998 - present
Process_Step:
Process_Description:
County inventories were merged together.
Process_Date: 2009
Process_Step:
Process_Description:
Metadata imported.
Source_Used_Citation_Abbreviation:
C:\DOCUME~1\tamia\LOCALS~1\Temp\xmlDE7.tmp
Process_Date: 20090821
Process_Time: 14371400
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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: 36661
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Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 18
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -75.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000
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
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Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: va_sstru_2009
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: structure
Attribute_Definition:
erosion control
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: breakwater
Enumerated_Domain_Value_Definition:
Structures parallel to the shoreline
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: bulkhead
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: debris
Enumerated_Domain_Value_Definition:
Can include tires, tubes, rubble, etc
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: dilapidated bulkhead
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: groinfield
Enumerated_Domain_Value_Definition:
Structures perpendicular to the shoreline
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: jetty
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: marina
Enumerated_Domain_Value_Definition:
includes infrastructure such as piers, bulkhead, wharfs. Divided into two categories (<50 slips & >50 slips) beginning in the 2003 field season.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: marina, <50 slips
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: marina, >50 slips
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: marsh toe revetment
Enumerated_Domain_Value_Definition:
Placed in front of an eroding marsh
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: military wharf
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: miscellaneous
Enumerated_Domain_Value_Definition:
Miscellaneous was divided into two categories (debris & unconventional) beginning with the 2004 field season.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: riprap
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: seawall
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: shipyard
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: unconventional
Enumerated_Domain_Value_Definition:
Composed of non-traditional materials
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: wharf
Attribute:
Attribute_Label: GPS_DATE
Attribute_Definition:
Date of data capture
Attribute:
Attribute_Label: REMOTE
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: yes
Enumerated_Domain_Value_Definition:
Data coded in the lab using background imagery
Attribute:
Attribute_Label: COUNTY
Attribute_Definition:
county or waterbody inventoried
Attribute:
Attribute_Label: LENGTH
Attribute:
Attribute_Label: SURVEYED
Attribute_Definition:
year data collected
Attribute:
Attribute_Label: SHORELINE
Attribute_Definition:
base shoreline used (refer to lineage)
Overview_Description:
Entity_and_Attribute_Overview:
Two other shapefiles combine with _lubc to complete the Shoreline Inventory. The complete set includes _lubc, _astru, and _sstru. Attributes in the _lubc file include: FEATURE or land use may contain the following values: agriculture, bare, commercial, educational/school, family dwelling, forest, grass, industrial, military, multifamily dwelling, paved, residential, scrub-shrub, and timbered; HEIGHT is the bank height with 0 - 5 feet, 5 - 10 feet, and 10 - 30 feet, and >30; EROSION or bank erosion can have the values: low, high, undercut, erosional, erosional/undercut, stable, stable/undercut, transitional, or transition/undercut; MARSH values may be yes, no, yes(erosion), yes(no_erosion), embayed, extensive, and fringe <5, 5-10, 10-15 and >15; Beach values are the presence or absence of beach where "yes" indicates a beach and "no" or a null value indicates no beach;   Cover (bank cover) is defined as bare, partial, or total;  Tree Fringe is coded as 'Yes" for the presence of a tree buffer along the shoreline; Canopy overhang is "yes" if the tree fringe overhangs the shoreline; and REMOTE refers to how the data was gathered: a blank value indicates the data was collected with the GPS unit, a "y" indicates that the shoreline attributes where determined from imagery.  Phragmites australis is coded as 'yes' where its presence is noted.   Attributes in the _astru (access structure shapefile) are: PNTSTRUC contains access structures such as boathouse, dock, dilapidated dock, outfall, and public or private ramp; and REMOTE. Attributes found in the _sstru shapefile are: STRUCTURE (erosion control)with values such as breakwater, bulkhead, debris, dilapidated bulkhead, groinfield, jetty, marina, marsh toe revetment, military wharf, miscellaneous, riprap, seawall, shipyard, unconventional, and wharf; and REMOTE.
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Distribution_Information:
Resource_Description: Downloadable Data
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Transfer_Size: 38.108
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Metadata_Reference_Information:
Metadata_Date: 20090821
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Tami Rudnicky
Contact_Organization: Virginia Institute of Marine Science (VIMS)
Contact_Position: GIS Programmer/Analyst
Contact_Address:
Address_Type: P.O. Box 1346
Address:
Greate Road
City: Gloucester Point
State_or_Province: Virginia
Postal_Code: 23062
Contact_Voice_Telephone: 804-684-7181
Contact_Facsimile_Telephone: 804-684-7179
Contact_Electronic_Mail_Address: tamia@vims.edu
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
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