Chowan River, North Carolina Shoreline Situation Report - 2006

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Metadata:


Identification_Information:

Citation:
Citation_Information:
Originator:
Comprehensive Coastal Inventory, Virginia Institute of Marine Science
Publication_Date: 2006
Title: Chowan River, North Carolina Shoreline Situation Report - 2006
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 North Carolina's Chowan River tidal shoreline conditions.

Supplemental_Information:
There are three shapefiles that are included in this metadata file; chowan_lubc, chowan_astru, chowan_sstru. Chowan_lubc (land use and bank cover for Chowan River) is an linear shapefile containing data about the land use, bank height, bank cover, erosion, marsh, and beach status along the shoreline. Chowan_sstru (Chowan River shoreline structures) is an linear shapefile delineating hard structures in place for shoreline protection (bulkhead, riprap, groin fields). Chowan_astru (Chowan River access structures) is a point shapefile with locations of docks, ramps, and boathouses. The attributes of these three datasets are explained in the Entity and Attribute Information section below.

Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20051011
Ending_Date: 20060502
Currentness_Reference: ground condition at time of survey.

Status:
Progress: Complete
Maintenance_and_Update_Frequency: None Planned

Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -77.00360172
East_Bounding_Coordinate: -76.56028745
North_Bounding_Coordinate: 36.50739218
South_Bounding_Coordinate: 35.97794395

Keywords:
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: Shoreline condition
Theme_Keyword: Shoreline structures
Place:
Place_Keyword_Thesaurus: none
Place_Keyword: North Carolina
Place_Keyword: Bertie County
Place_Keyword: Chowan County
Place_Keyword: Gates County
Place_Keyword: Hertford County
Place_Keyword: Chowan 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 and processing: Juan Arevalo, Marcia Berman, Harry Berquist, Sharon Killeen, Karinna Nunez, and Tami Rudnicky.

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:
Chowan River shoreline was surveyed from the mouth of the river to just beyond the U.S. Route 13 bridge near Winton, North Carolina.

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: 1998
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: 1998
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: DOQ
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:
Using ERDAS Imagine software a new base shoreline for the Chowan River was created by digitizing the land-water interface illustrated on the DOQs.
Source_Used_Citation_Abbreviation: DOQ
Process_Date: 2005

Process_Step:
Process_Description:
Data was collected by a two-person field crew (one data collector and one boat operator/data collector) 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. The data collector records natural features including land use, bank height, bank cover, presence of marsh or beach, and shoreline stability. The boat operator 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. Data collection began 10/11/05 and was completed on 5/3/06.
Process_Date: 2006

Process_Step:
Process_Description:
Data from the GPS units were postprocessed on a PC with Trimble Pathfinder Office software. Postprocessing included differential correction using data collected at various CORS (continuously operating reference stations) sites. Corrected data is converted into shapefiles for further processing.
Process_Date: 2006

Process_Step:
Process_Description:
ArcMap 9.1 software on a PC was used to attribute the base shoreline. Boat-track points and arcs, DOQ imagery, and the base shoreline were displayed in ArcMap. Shoreline arcs were split using the edit tool and the spatial adjustment attribute transfer tool was used to move the attributes from the boat track to the shoreline. Arcs were split on and points were moved to locations on the shoreline that were perpendicular to the original locations on the boat-track. VBMP imagery provided additional information for placement of features. Geodatabase features were visually checked for attribute accuracy between coded shoreline and boat-track data.
Source_Used_Citation_Abbreviation: DOQ
Process_Date: 2005

Process_Step:
Process_Description:
Twentynine 1:12,000 scale plates were created for Chowan River 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. Maps are created using ArcMap software.
Process_Date: 2006

Process_Step:
Process_Description:
Data received a final check in hard copy map format. Changes were made as necessary to data.
Process_Date: 2006


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: 850
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 457
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 525


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: 5.804175
Ordinate_Resolution: 5.804175
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 shapefiles (_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. Chowan_lubc contains the following items; FEATURE or land use, has the following values: ' ' = no data, Agriculture, Bare, Commercial, Forest, Grass, Industrial, Paved, Residential, Scrub-shrub, and Swamp. Height is bank height with ' ' = no data, 0 - 5 feet, 5 - 10 feet, 10 - 30 feet, and greater than 30 feet. COVER describes the bank cover with values of ' ' = 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 ' ' for no data, low erosion, high erosion, or undercut. MARSH provides information on the status of the marsh; ' ' = no data, Yes(Erosion) = marsh eroding, Yes(No_Erosion) = marsh not eroding, and No = no marsh. FRINGE_MAR is a narrow strip of marsh vegetation extending along the shoreline. If it is present this item is coded 'yes', otherwise it is 'no' or ' '. BEACH defines ' ' = no data, Yes(Erosion) = beach eroding, Yes(No_Erosion) = beach not eroding, and No = no beach. PHRAG with the value 'yes' indicates the presence of Phragmites australis. TREE_FRING with the value 'yes' indicates there are a narrow bnad of trees growing on the bank. STRUCTURE contains the types of shoreline structures found in the Chowan River: bulkhead, riprap, debris (tires, bricks, etc. tossed haphazardly along the shoreline), unconventional (concrete blocks, or other miscellaneous material placed neatly along the shoreline for stabilization), groin field, jetty, dilapidated bulkhead, and marina (<50 slips, or >50 slips). PNTSTRUC contains the types of access structures or points of interest found along the shoreline: docks/piers, boathouses, public and private ramps, outfalls (pipes open to the water), and other points of interest. GPS_DATE holds the date of data collection.

CHOWAN_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  CHOWAN_LUBC#           4     5     B      -
   25  CHOWAN_LUBC-ID         4     5     B      -
   29  TREE_FRING            20    20     C      -
   49  HEIGHT                20    20     C      -
   69  COVER                 20    20     C      -
   89  EROSION               20    20     C      -
  109  FRINGE_MAR            20    20     C      -
  129  MARSH                 20    20     C      -
  149  PHRAG                 20    20     C      -
  169  BEACH                 20    20     C      -
  189  GPS_DATE               8    10     D      -
  297  FEATURE               25    25     C      -


CHOWAN_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  CHOWAN_SSTRU#          4     5     B      -
   25  CHOWAN_SSTRU-ID        4     5     B      -
   29  GPS_DATE               8    10     D      -
   37  STRUCTURE             25    25     C      -


CHOWAN_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  CHOWAN_ASTRU#          4     5     B      -
   13  CHOWAN_ASTRU-ID        4     5     B      -
   17  GPS_DATE               8    10     D      -
   25  NORTHING               8    19     F      3
   33  EASTING                8    19     F      3
   41  PNTSTRUC              25    25     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: 20060530
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 Wed May 31 09:00:16 2006