Calvert County, Maryland Shoreline Situation Portfolio - 2006

Metadata also available as

Metadata:
Identification_Information:

Citation:
Citation_Information:
Originator:
Comprehensive Coastal Inventory, Virginia Institute of Marine Science
Publication_Date: 2006
Title: Calvert County, Maryland Shoreline Situation Portfolio - 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://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:
There are three coverages that are included in this metadata file; calv_lubc, calv_astru, calv_sstru. Calv_lubc (land use and bank cover for Calvert County) is an arc coverage containing data about land use, bank height, bank cover, erosion, marsh, and beach status along the shoreline. Calv_sstru (Calvert County shoreline structures) is an arc coverage delineating hard structures in place for shoreline protection (bulkhead, riprap, groin fields). Calv_astru (Calvert 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: 20040712
Ending_Date: 20050510
Currentness_Reference: ground condition at time of survey.

Status:
Progress: Complete
Maintenance_and_Update_Frequency: None Planned

Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -76.70357749
East_Bounding_Coordinate: -76.37958275
North_Bounding_Coordinate: 38.81191664
South_Bounding_Coordinate: 38.31330483

Keywords:
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: Shoreline condition
Theme_Keyword: Shoreline structures
Place:
Place_Keyword_Thesaurus: none
Place_Keyword: Maryland
Place_Keyword: Calvert County
Place_Keyword: Chesapeake Bay
Place_Keyword: Patuxent 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 CCRM staff participated in the data collection and processing: Marcia Berman, Harry Berquist, Lindy Dingerson, Sharon Killeen, Ben McFarlane, 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:
All Calvert 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. Data collection began 7/12/04 and was completed on 5/10/05.
Process_Date: 2005

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: 2005

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:
ArcMap 9.0 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:
Thirtyone 1:12,000 scale plates were created for Calvert 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

Process_Step:
Process_Description:
Data was collected for Grapevine Creek, Mears Creek, Hungerford Creek, and Coster Cove on 5/17/2006. This data was integrated with Calvert County data, maps and summary tables.
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: 2469
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 1545
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 1414
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: 0.0004283484136
Ordinate_Resolution: 0.0004283484136
Planar_Distance_Units: Meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: GRS80
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. Calv_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. STRUCTURE contains the types of shoreline structures found in Calvert County: bulkhead, riprap, debri (tires, bricks, etc. tossed haphazardly along the shoreline), unconventional (concrete blocks, or other miscellaneous material placed neatly along the shoreline for stabilization), 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. 

CALV_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                 8    18     F      5
   25  CALV_LUBC#             4     5     B      -
   29  CALV_LUBC-ID           4     5     B      -
   33  FEATURE               20    20     C      -
   53  HEIGHT                20    20     C      -
   73  COVER                 20    20     C      -
   93  EROSION               20    20     C      -
  113  MARSH                 20    20     C      -
  133  PHRAG                 20    20     C      -
  153  BEACH                 20    20     C      -
  173  GPS_DATE               8    10     D      -
  181  COUNTY                50    50     C      -


CALV_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                 8    18     F      5
   25  CALV_SSTRU#            4     5     B      -
   29  CALV_SSTRU-ID          4     5     B      -
   33  STRUCTURE             20    20     C      -
   53  GPS_DATE               8    10     D      -
   61  COUNTY                50    50     C      -


CALV_ASTRU.PAT:

COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME
    1  AREA                   8    18     F      5
    9  PERIMETER              8    18     F      5
   17  CALV_ASTRU#            4     5     B      -
   21  CALV_ASTRU-ID          4     5     B      -
   25  GPS_DATE               8    10     D      -
   33  PNTSTRUC              20    20     C      -
   53  COUNTY                50    50     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: 20051012
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 Thu Jul 13 15:47:41 2006