Caroline County, Virginia Shoreline Situation Report - 2004

Metadata also available as

Metadata:


Identification_Information:

Citation:
Citation_Information:
Originator:
Comprehensive Coastal Inventory, Virginia Institute of Marine Science
Publication_Date: 2004
Title: Caroline County, Virginia Shoreline Situation Report - 2004
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publication_Place: Gloucester Point, Virginia
Publisher: Virginia Institute of Marine Science
Online_Linkage: <URL:<http://www.vims.edu/ccrm/gis/gisdata.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 three coverages that are included in this metadata file; car_lubc, car_astru, car_sstru. Car_lubc (land use and bank cover for Caroline County) is an arc coverage containing data about the land use, bank height, bank cover, erosion, marsh, and beach status along the shoreline. Car_sstru (Caroline County shoreline structures) is an arc coverage delineating hard structures in place for shoreline protection (bulkhead, riprap, groin fields). Car_astru (Caroline County access structures) coverage is a point coverage with locations of docks, ramps, and boathouses. The attributes of these three coverages are explained in the Entity and Attribute Information section below.

Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19990920
Ending_Date: 20010530
Currentness_Reference: ground condition at time of survey.

Status:
Progress: Complete
Maintenance_and_Update_Frequency: None Planned

Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -77.36755972
East_Bounding_Coordinate: -77.11421238
North_Bounding_Coordinate: 38.25711487
South_Bounding_Coordinate: 38.12923746

Keywords:
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: Shoreline condition
Theme_Keyword: Shoreline structures
Place:
Place_Keyword_Thesaurus: none
Place_Keyword: Virginia
Place_Keyword: Caroline County
Place_Keyword: Rappahannock 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 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

Data_Set_Credit:
Collection of the data would not have been possible without the cooperation of VIMS Vessel Center. The following CCI staff participated in the data collection: Marcia Berman, Harry Berquist, Sharon Killeen, Liz Mountz, Tami Rudnicky, Dan Schatt, and Helen Woods.

Native_Data_Set_Environment:
SunOS, 5.7, sun4u UNIX ARC/INFO version 7.2.1


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 line and point coverages were built for points.

Completeness_Report:
All Caroline County shoreline that has a minimum depth of 2 feet at mean low water was surveyed. Areas inaccessible by boat have been remote surveyed (land use, marsh, beach, and structures coded by looking at the digital orthophoto quarter quads).

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 +/- 2 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: 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:
Range_of_Dates/Times:
Beginning_Date: 19940312
Ending_Date: 19940402
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: DOQQ
Source_Contribution:
Serves as a background coverage in 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.

Process_Step:
Process_Description:
Data was collected by a three-person field crew (two data collectors and one boat operator) 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, bank cover, 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 ten second observation recorded at 1 reading/second. Linear features were surveyed kinematically at a rate of one observation every 3 seconds.
Process_Date: 1999 and 2001

Process_Step:
Process_Description:
Data from the GPS units were postprocessed on a PC with Trimble Pathfinder Office software. Postprocessing included differential correction using base station data collected at the VIMS laboratory. Corrected data is converted into ArcInfo coverages and transfered to a UNIX workstation for further processing.
Process_Date: 2001

Process_Step:
Process_Description:
Using ArcInfo and ERADAS Imagine in the UNIX environment, a new base shoreline was created by digitizing the land-water interface illustrated on the DOQQs. Caroline County boundary (determined from the USGS DLG digital dataset (1990)) set the limits for Caroline shoreline.
Source_Used_Citation_Abbreviation: DOQQ
Process_Date: 2002

Process_Step:
Process_Description:
In the UNIX ArcInfo environment, boat-track points and arcs were manually shifted to the base shoreline. Arcs were split and points were moved to locations on the shoreline that were perpendicular to the original locations on the boat-track. Shoreline arcs segments and points were coded, and the coverages were visually checked for attribute accuracy between coded shoreline and boat-track data.
Source_Used_Citation_Abbreviation: DOQQ
Process_Date: 2003

Process_Step:
Process_Description:
Land use, dock, and boathouse locations were digitally checked and repositioned if necessary with DOQQ imagery displayed as a background coverage. This was done using ArcInfo's ArcEdit capabilities.
Source_Used_Citation_Abbreviation: DOQQ
Process_Date: 2003

Process_Step:
Process_Description: Data received a final check in hard copy format.
Process_Date: 2003

Process_Step:
Process_Description:
Nine 1:12,000 scale plates were created for Caroline County. Each plate shows three maps: riparian land use, bank and buffer conditions, and shoreline features. DOQQ imagery is displayed in the background to provide users with additional information.
Process_Date: 2003


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: 190
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 44
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 17


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: .9996
Longitude_of_Central_Meridian: -75W
Latitude_of_Projection_Origin: 0.0
False_Easting: 500000
False_Northing: 0.0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 2.1871
Ordinate_Resolution: 2.1871
Planar_Distance_Units: Meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: GRS1980
Semi-major_Axis: 6378206.4
Denominator_of_Flattening_Ratio: 294.98


Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
Below is a listing of the attributes found in the three coverages (_lubc, _sstru, and _astru). The first seven items found in the .aat files and the first four items in the .pat file are ArcInfo generated. Car_lubc contains the following items; FEATURE or land use, has the following values: ' ' = no data, forest, scrub-shrub, grass, residential, bare, agriculture, and paved. HEIGHT is bank height with 0 or ' ' = no data, 0 - 5 feet, 5 - 10 feet, 10 - 30 feet, and greater than 30 feet. COVER describes the bank cover with values of 0 or ' ' = no data, bare or less than 25% covered, partial coverage (25-75% coverage), and full coverage (greater than 75% coverage). EROSION is the bank erosion condition. Values can be 0 or ' ' for no data, low erosion, high erosion, or undercut. MARSH provides information on the status of the marsh; 0 or ' ' = no data, marsh eroding, marsh not eroding, and no marsh. BEACH defines 0 or ' ' = no data, beach eroding, beach not eroding, and no beach. REMOTE refers to how the data was gathered: a blank value or an "n" indicates the data was collected with the GPS unit in the field, a "y" indicates that the shoreline attributes where determined from the DOQQ imagery. However, an empty REMOTE value along with other empty values indicates no data was collected. STRUCTURE contains the types of shoreline structures found in Caroline County: riprap, and miscellaneous (bricks, timbers, concrete blocks, tires, etc.). PNTSTRUC contains the types of access structures or points of interest found within the county: docks/piers, boathouses, public and private ramps, and other points of interest.

CAR_LUBC.AAT:

COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME
    1  FNODE#                 4     5     B      -
    5  TNODE#                 4     5     B      -
    9  LPOLY#                 4     5     B      -
   13  RPOLY#                 4     5     B      -
   17  LENGTH                 4    12     F      3
   21  CAR_LUBC#              4     5     B      -
   25  CAR_LUBC-ID            4     5     B      -
   29  FEATURE               20    20     C      -
   49  COVER                 20    20     C      -    BANK_COVER
   69  EROSION               20    20     C      -
   89  MARSH                 20    20     C      -
  109  PHRAG                 20    20     C      -
  129  BEACH                 20    20     C      -
  149  HEIGHT                20    20     C      -    BANK_HGT
  169  REMOTE                 4     4     C      -

CAR_SSTRU.AAT:

COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME
    1  FNODE#                 4     5     B      -
    5  TNODE#                 4     5     B      -
    9  LPOLY#                 4     5     B      -
   13  RPOLY#                 4     5     B      -
   17  LENGTH                 4    12     F      3
   21  CAR_SSTRU#             4     5     B      -
   25  CAR_SSTRU-ID           4     5     B      -
   29  STRUCTURE             20    20     C      -

CAR_ASTRU.PAT:

COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME
    1  AREA                   4    12     F      3
    5  PERIMETER              4    12     F      3
    9  CAR_ASTRU#             4     5     B      -
   13  CAR_ASTRU-ID           4     5     B      -
   17  PNTSTRUC              20    20     C      -


Entity_and_Attribute_Detail_Citation: none


Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Virginia Institute of Marine Science (VIMS)
Contact_Position: Director 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_Instructions: Contact via email
Contact_Electronic_Mail_Address: marcia@vims.edu

Distribution_Liability:

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.


Metadata_Reference_Information:
Metadata_Date: 20040123
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Virginia Institute of Marine Science (VIMS)
Contact_Person: Tamia Rudnicky
Contact_Position: GIS Programmer/Analyst
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) 684-7181
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_Access_Constraints: none
Metadata_Use_Constraints: none

Generated by mp version 2.5.4 on Mon May 15 14:18:36 2006