Tidal Marsh Inventory (TMIALL83)

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator:

Comprehensive Coastal Inventory, VIMS, College of William and Mary

Publication_Date: 1974-1988

Title: Tidal Marsh Inventory (TMIALL83)

Publication_Information:

Publication_Place: Gloucester Point, VA

Publisher: Virginia Institute of Marine Science

Description:

Abstract:

The Tidal Marsh Inventory (TMI) data are the digitized record of the VIMS Tidal Marsh Inventories developed by the Wetlands Research Program at the Virginia Institute of Marine Science (VIMS). Tidal wetlands were inventoried as mandated by Section 62.1-13.4 of the Virginia Wetlands Act of 1972. This effort began in 1972 and continued through the mid 1980's. The conversion to digital format was complete in 1992. No revisions to the data have occurred since the original data collection.

Purpose:

The TMI data can be used for monitoring changes in wetland resources, identifying environmentally sensitive areas for planning and landuse purposes, and to assist agencies regulating encroachment into tidal wetlands.

Supplemental_Information:

Tidal wetlands data were collected through site visits to all tidal marshes in Virginia using aerial photography for assistance. The geographic boundaries of tidal marshes were digitized from stable-based mylar, USGS 7.5 minute topographic quadrangle maps (scale = 1:24000). Aerial photography was used to correct for obvious discrepancies in the boundaries observed. The community structure and composition was described through site visits to all tidal marshes in the Tidewater region of Virginia. Digitized marsh polygons are coded for marsh or community type, marsh number, and county location. Community type is defined in accordance with criteria outlined in the WETLANDS GUIDELINES published by the VMRC in 1993. Marsh number refers to the catalogue number assigned to a specific polygon in the corresponding hardcopy publication. The Federal Information Processing System (FIPS) codes are used for "county" locator.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1974

Ending_Date: 1988

Currentness_Reference: Publication date of sources

Status:

Progress: Complete

Maintenance_and_Update_Frequency: none

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -77.48525413

East_Bounding_Coordinate: -75.24489847

North_Bounding_Coordinate: 38.91213452

South_Bounding_Coordinate: 36.5293086

Keywords:

Theme:

Theme_Keyword_Thesaurus: none

Theme_Keyword: Tidal Marsh Inventory

Theme_Keyword: TMI

Place:

Place_Keyword_Thesaurus: none

Place_Keyword: Tidewater Virginia

Access_Constraints: none

Use_Constraints:

Not for use in determining jurisdictional boundaries for regulatory purposes.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Marcia Berman

Contact_Organization: Virginia Institute of Marine Science (VIMS)

Contact_Position: Director of Comphrehensive 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) 684-7182

Contact_Electronic_Mail_Address: marcia@vims.edu

Native_Data_Set_Environment:

SunOS, 4.1.4, sun4c UNIX ARC/INFO version 7.0.3

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Digitized boundaries and codes are plotted to scale and overlaid onto original map medium to check for accuracy. Coding is checked by the supervisor or senior staff against the digitized record. A minimum of two checks have been performed for each topographic quadrangle.

Logical_Consistency_Report:

Polygon topology present. All dangling arcs were removed.

Completeness_Report:

All polygons are labeled with a FIPS code. Many marshes smaller than one quarter acre (usually narrow fringing marshes) do not have a type label or a marsh number.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Digital boundaries of the tidal marshes were plotted at 1:24000 scale and overlayed on USGS 7.5' mylar topographic maps.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator:

Dept. of Wetlands Ecology, VIMS, College of William and Mary

Publication_Date: 1974-1988

Title:

Tidal Marsh Inventories Special Report in Applied Marine Science and Ocean Engineering

Geospatial_Data_Presentation_Form: map

Series_Information:

Series_Name: by Tidewater locality

Issue_Identification: by Tidewater locality

Publication_Information:

Publication_Place: Gloucester Point, VA

Publisher: Virginia Institute of Marine Science

Source_Scale_Denominator: 24000

Type_of_Source_Media: stable-base material

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1974

Ending_Date: 1988

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: none

Source_Contribution: spatial and attribute information

Process_Step:

Process_Description:

Stable-based topographic maps were registered to geographic coordinates, marsh boundaries were digitzed and polygons labeled. Arcedit weed tolerance was set to 0.001, nodesnap and snapping closest were set to 10 meters. The coverages were cleaned with a fuzzy tolerance of .001 inches (1 m in UTM). Accurracy was checked by overlaying a check plot onto the original base map. The completed quadrangles were then appended, the quad boundaries removed, and edgematch problems resolved.

Process_Date: 1996

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Point

Point_and_Vector_Object_Count: 18628

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: String

Point_and_Vector_Object_Count: 43400

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains

Point_and_Vector_Object_Count: 18629

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: 0.9996

Longitude_of_Central_Meridian: -75 W

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: 0.8593174219131

Ordinate_Resolution: 0.8593174219131

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:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Tidal marsh

Entity_Type_Definition: Polygons representing a tidal marsh

Entity_Type_Definition_Source: Inhouse inventory and FIPS codes

Attribute:

Attribute_Label: AREA

Attribute_Definition: Area of poly/region in square coverage units

Attribute_Definition_Source: ArcInfo Computed

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 99999999.999

Attribute_Units_of_Measure: meters

Attribute:

Attribute_Label: PERIMETER

Attribute_Definition: Perimeter of poly/region in coverage units

Attribute_Definition_Source: ArcInfo Computed

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 99999999.999

Attribute_Units_of_Measure: meters

Attribute:

Attribute_Label: TMIALL83#

Attribute_Definition: Internal feature number

Attribute_Definition_Source: ArcInfo Computed

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 99999999

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: TMIALL83-ID

Attribute_Definition: User-assigned feature number

Attribute_Definition_Source: User-defined

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 99999999

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: MFIPS

Attribute_Definition: FIPS code/VIMS marsh number

Attribute_Definition_Source: Federal Government/VIMS

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 1

Enumerated_Domain_Value_Definition: Water

Enumerated_Domain_Value_Definition_Source:

Tidal Marsh Inventories Special Report in Applied Marine Science and Ocean Engineering, Virginia Institute of Marine Science

Enumerated_Domain:

Enumerated_Domain_Value: 2

Enumerated_Domain_Value_Definition: Land

Enumerated_Domain_Value_Definition_Source:

Tidal Marsh Inventories Special Report in Applied Marine Science and Ocean Engineering, Virginia Institute of Marine Science

Enumerated_Domain:

Enumerated_Domain_Value: xxxx

Enumerated_Domain_Value_Definition: marsh number

Enumerated_Domain_Value_Definition_Source:

Tidal Marsh Inventories Special Report in Applied Marine Science and Ocean Engineering, Virginia Institute of Marine Science

Attribute:

Attribute_Label: FIPS

Attribute_Definition:

Federal Information Processing System (FIPS) codes

Attribute_Definition_Source: Federal Government

Attribute_Domain_Values:

Codeset_Domain:

Codeset_Name: Federal Information Processing System

Codeset_Source: Federal Government

Attribute:

Attribute_Label: MARSHNO

Attribute_Definition: VIMS marsh number

Attribute_Definition_Source:

Catalogue number of each polygon from VIMS hardcopy publication

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 99999999

Attribute:

Attribute_Label: TYPE

Attribute_Definition: Marsh or wetland community type

Attribute_Definition_Source: Wetlands Guidelines

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 1

Enumerated_Domain_Value_Definition: Saltmarsh Cordgrass Community

Enumerated_Domain_Value_Definition_Source: Wetlands Guidelines

Enumerated_Domain:

Enumerated_Domain_Value: 2

Enumerated_Domain_Value_Definition: Saltmeadow Community

Enumerated_Domain_Value_Definition_Source: Wetlands Guidelines

Enumerated_Domain:

Enumerated_Domain_Value: 3

Enumerated_Domain_Value_Definition: Black Needlerush Community

Enumerated_Domain_Value_Definition_Source: Wetlands Guidelines

Enumerated_Domain:

Enumerated_Domain_Value: 4

Enumerated_Domain_Value_Definition: Saltbush Community

Enumerated_Domain_Value_Definition_Source: Wetlands Guidelines

Enumerated_Domain:

Enumerated_Domain_Value: 5

Enumerated_Domain_Value_Definition: Big Cordgrass Community

Enumerated_Domain_Value_Definition_Source: Wetlands Guidelines

Enumerated_Domain:

Enumerated_Domain_Value: 6

Enumerated_Domain_Value_Definition: Cattail Community

Enumerated_Domain_Value_Definition_Source: Wetlands Guidelines

Enumerated_Domain:

Enumerated_Domain_Value: 7

Enumerated_Domain_Value_Definition: Arrow Arum-Pickerelweed Community

Enumerated_Domain_Value_Definition_Source: Wetlands Guidelines

Enumerated_Domain:

Enumerated_Domain_Value: 8

Enumerated_Domain_Value_Definition: Reed Grass Community

Enumerated_Domain_Value_Definition_Source: Wetlands Guidelines

Enumerated_Domain:

Enumerated_Domain_Value: 9

Enumerated_Domain_Value_Definition: Yellow Pond Lily Community

Enumerated_Domain_Value_Definition_Source: Wetlands Guidelines

Enumerated_Domain:

Enumerated_Domain_Value: 10

Enumerated_Domain_Value_Definition: Saltwort Community

Enumerated_Domain_Value_Definition_Source: Wetlands Guidelines

Enumerated_Domain:

Enumerated_Domain_Value: 11

Enumerated_Domain_Value_Definition: Freshwater Mixed Community

Enumerated_Domain_Value_Definition_Source: Wetlands Guidelines

Enumerated_Domain:

Enumerated_Domain_Value: 12

Enumerated_Domain_Value_Definition: Brackish Water Mixed Community

Enumerated_Domain_Value_Definition_Source: Wetlands Guidelines

Overview_Description:

Entity_and_Attribute_Overview:

Polygons (PAT) attribute table contains four items: MFIPS, FIPS, MARSHNO, and TYPE. The item definition is 7, 7, I for the first three items, and 2, 2, I for TYPE. Each code is numeric identifier for a marsh, a wetland community, or the county the wetland is found within. The MFIPS item includes the codes 1 and 2 for water and land. If there is more than one water or upland poly within a coverage, there will be multiple polygons with the same MFIPS code. MFIPS will only be unique for those items coded as marshes. If MFIPS=1 (water) then FIPS=0 and MARSHNO=1. If MFIPS=2 (land), then FIPS=0 and MARSHNO=2. There are twelve marsh types that describe various vegetative communities.

Entity_and_Attribute_Detail_Citation:

Virginia Marine Resources Commission. 1993. WETLANDS GUIDELINES, Virginia Marine Resources Commission, Habitat Management Division, and the Virginia Institute of Marine Science, Dept. of Wetlands Ecology, Newport News, Virginia, pp.74.

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Virginia Institute of Marine Science (VIMS)

Contact_Position: Director of Comphrehensive 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) 684-7182

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 generated by other agencies. 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: 19971021

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Virginia Institute of Marine Science (VIMS)

Contact_Person: Tamia Rudnicky

Contact_Position: Programmer

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) 684-7182

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