Kent County, Maryland Shoreline Feature Datasets

Metadata also available as

Metadata:

Identification_Information:

Citation:

Citation_Information:

Originator:

Comprehensive Coastal Inventory, Virginia Institute of Marine Science

Publication_Date: 2005

Title: Kent County, Maryland Shoreline Feature Datasets

Geospatial_Data_Presentation_Form: vector digital data

Publication_Information:

Publication_Place: Gloucester Point, Virginia

Publisher: Virginia Institute of Marine Science

Online_Linkage: <http://ccrm.vims.edu/gisdatabases.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. The techniques developed for Virginia's shoreline are used to create similar reports for the Maryland shoreline. Data collected describes conditions in the immediate riparian zone, the bank, and along the shore.

Purpose: To inventory Maryland's tidal shoreline conditions.

Supplemental_Information:

The Kent County SSR contains three feature datasets; kent_lubc, kent_astru, kent_sstru. Kent_lubc (land use and bank cover for Kent County) is a line feature dataset containing data about land use, bank height, bank cover, erosion, marsh and beach status, and phragmites along the shoreline. Kent_sstru (Kent County shoreline structures) is a line feature dataset delineating hard structures in place for shoreline protection (bulkhead, riprap, groin fields, etc.). Kent_astru (Kent County access structures) is a point feature dataset 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: 20040622

Ending_Date: 20041004

Currentness_Reference: ground condition at time of survey.

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -76.282499

East_Bounding_Coordinate: -75.814416

North_Bounding_Coordinate: 39.381771

South_Bounding_Coordinate: 39.007610

Keywords:

Theme:

Theme_Keyword_Thesaurus: none

Theme_Keyword: Shoreline condition

Theme_Keyword: Shoreline structures

Place:

Place_Keyword_Thesaurus: none

Place_Keyword: Maryland

Place_Keyword: Kent County

Place_Keyword: Sassafras River

Place_Keyword: Chester River

Place_Keyword: Eastern Neck Island

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 CCRM staff participated in the data collection and processing: Marcia Berman, Harry Berquist, Sharon Killeen, Karinna Nunez, Dave O'Brien, Tami Rudnicky, Dan Schatt, and Helen Woods.

Native_Data_Set_Environment:

Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 9.0.0.535

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 Kent County shoreline that has a minimum depth of 2 feet at mean low water, and accessible by boat, was surveyed.

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 visible 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: Maryland Department Of Natural Resources

Publication_Date: 19980101

Title: MrSID Color Infrared DOQ's

Geospatial_Data_Presentation_Form: GIS coverage

Publication_Information:

Publication_Place: Annapolis, Maryland

Publisher: Maryland Department Of Natural Resources

Type_of_Source_Media: Color Infrared DOQ's

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19880303

Ending_Date: 19950501

Source_Currentness_Reference: Ground conditions

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 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.

Process_Date: 2004

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 ArcInfo coverages and transferred to a UNIX workstation for further processing.

Process_Date: 2004

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.

Source_Used_Citation_Abbreviation: DOQQ

Process_Date: 2004

Process_Step:

Process_Description:

The ArcInfo base shoreline coverage was converted to a geodatabase.

Process_Date: 2004

Process_Step:

Process_Description:

ArcMap 8.2 software on a PC was used to attribute the base shoreline. Boat-track points and arcs, DOQQ 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. DOQQ 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: DOQQ

Process_Date: 2005

Process_Step:

Process_Description:

Forty two 1:12,000 scale plates were created for Kent 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. Maps are created using ArcMap software.

Process_Date: 2005

Process_Step:

Process_Description:

Data received a final check in hard copy map format. Changes were made as necessary to data.

Process_Date: 2005

Process_Step:

Process_Description:

Geodatabase features were converted into ArcInfo coverages and shapefiles.

Process_Date: 2005

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: 3635

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: String

Point_and_Vector_Object_Count: 1754

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Entity point

Point_and_Vector_Object_Count: 973

 

 

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: 0.000208

Ordinate_Resolution: 0.000208

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

Vertical_Coordinate_System_Definition:

Altitude_System_Definition:

Altitude_Resolution: 0.000010

Altitude_Encoding_Method:

Explicit elevation coordinate included with horizontal coordinates

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: kent_lubc

Detailed_Description:

Entity_Type:

Entity_Type_Label: kent_sstru

Detailed_Description:

Entity_Type:

Entity_Type_Label: kent_astru

Overview_Description:

Entity_and_Attribute_Overview:

Kent_lubc contains the following items; FEATURE or land use, has the following values: ' ' = no data, Agriculture, Bare, Commercial, Forest, Grass, Industrial, Paved, Residential, and Scrub-shrub. 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, Yes(Erosion) = marsh eroding, Yes(No_Erosion) = marsh not eroding, and No = no marsh. BEACH defines 0 or ' ' = 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. GPS_DATE contains the data collection date. STRUCTURE contains the types of shoreline structures found in Kent County: bulkhead, riprap, breakwater, debri (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, wharf, dilapidated bulkhead, and marina (<50 slips, or >50 slips). GPS_DATE contains the data collection date. 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.

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_Electronic_Mail_Address: marcia@vims.edu

Contact_Instructions: Contact via email

Resource_Description: Downloadable Data

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: 20050406

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_Time_Convention: local time

Metadata_Access_Constraints: none

Metadata_Use_Constraints: none

Metadata_Extensions:

Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>

Profile_Name: ESRI Metadata Profile

Generated by mp version 2.8.6 on Wed Apr 06 12:34:26 2005