The City of Chesapeake : Tidal Marsh Inventory

Metadata also available as

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator:
Sharon Killeen, Comprehensive Coastal Inventory Program, Virginia Institute of Marine Science, GIS Programmer/Analyst
Publication_Date: 20161230
Title: The City of Chesapeake : Tidal Marsh Inventory
Geospatial_Data_Presentation_Form: vector digital data
Online_Linkage:
<http://ccrm.vims.edu/gis_data_maps/static_maps/gis/tmi_updated.html>
Description:
Abstract:
The Virginia Institute of Marine Science published the first Tidal marsh Inventories for Virginia in the 1970s. Using high resolution color infra-red imagery from 2013 a new Tidal Marsh Inventory has been developed for the City of Chesapeake. Marsh boundaries were generated using heads-up digitizing techniques at a scale of 1:1,000. Each marsh polygon was classified by morphologic type: fringe, extensive, embayed, or marsh island. Marshes were ground-truthed in the field where a community type index was assigned to each marsh based on plant community make-up. Each marsh was also coded with a marsh number which corresponds to the original 1970s delineation and published in 1976 for the City of Chesapeake. This will provide an opportunity to review changes that have occurred in the marshes over time.
Purpose:
To maintain and update an inventory of the distribution of tidal marshes for the Commonwealth of Virginia.
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Unknown
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -76.436759
East_Bounding_Coordinate: -76.066529
North_Bounding_Coordinate: 36.863482
South_Bounding_Coordinate: 36.673816
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword:
Tidal Marsh, Wetland Plant Identification, Wetland Community Type
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Categories
Theme_Keyword: biota
Theme_Keyword: boundaries
Theme_Keyword: environment
Theme_Keyword: location
Place:
Place_Keyword_Thesaurus: None
Place_Keyword:
Western Branch Elizabeth River, Eastern Branch Elizabeth River, Southern Branch Elizabeth River, Sterns Creek, Drum Point Creek, Bailey Creek, Intracoastal Waterway, Paradise Creek, Julian Creek, Deep Creek
Access_Constraints: None
Use_Constraints:
The Comprehensive Coastal Inventory Program (CCI) provides these data with the understanding that it is not guaranteed to be correct or complete, and conclusions drawn from the data set are the sole responsibility of the user. See full TMI disclaimer page: <http://ccrm.vims.edu/gis_data_maps/static_maps/gis/disclaimer.html>
Native_Data_Set_Environment:
Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.4.0.5524
Data_Quality_Information:
Lineage:
Process_Step:
Process_Description:
A shoreline for the City of Chesapeake was created using the 2013 VBMP imagery as a backdrop and using ArcGis version 10.2. Using this as a baseline the shoreline inventory was remotely generated using two sources: Google Earth 2015 imagery , and 2013 high resolution imagery available through Bing Maps and 2013 high resolution imagery available from the Virginia Base Mapping Program (VBMP).
Process_Date: 20160129
Process_Step:
Process_Description:
Tidal marshes were delineated from 2013 VBMP imagery using onscreen digitizing techniques at a scale of 1:1,000. Bing and Google Earth online imagery was used to provide additional interpretive information to improve the accuracy of marsh boundaries. Marsh polygons were coded by shape and physiographic setting based on a classification system applied in the firstCity of Chesapeake Tidal Marsh Inventory (in 1991). Quality assurance and control measures were performed prior to generation of maps for fieldwork.
Process_Date: 20160330
Process_Step:
Process_Description:
VBMP imagery, with the marsh polygon layer overlay, was printed for use in field surveys of the marshes.
Process_Date: 20160502
Process_Step:
Process_Description:
Field collection of marsh data was performed primarily from a small shallow-draft vessel, navigating at slow speeds parallel to the shoreline. Surveys extended as far upstream as depth and field conditions allowed. Some additional data collection was performed by land where marshes were easily accessible from public lands. During surveys, marsh boundaries were verified, and wetland plant species observed within each marsh polygon were recorded along with relative cover estimates to determine marsh community types.
Process_Date: 20160601
Process_Step:
Process_Description:
Corrections were made to the digital data back at the lab using ArcGis Version 10.0.
Process_Date: 20160830
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 888
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: NAD 1983 UTM Zone 18N
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -75.0
Latitude_of_Projection_Origin: 0.0
False_Easting: 500000.0
False_Northing: 0.0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.000000002220024164500956
Ordinate_Resolution: 0.000000002220024164500956
Planar_Distance_Units: meter
Geodetic_Model:
Horizontal_Datum_Name: D North American 1983
Ellipsoid_Name: GRS 1980
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257222101
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: Chesapeake_TMI_2016
Attribute:
Attribute_Label: FID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: Id
Attribute:
Attribute_Label: MarshType
Attribute_Definition:
Description of polygon (i.e. marsh, nomarsh_forest, etc). Marsh = polygon is marsh Marsh island = polygon is marsh island NoMarsh_forest = polygon is forest NoMarsh_ScrubShrub = polygon is scrub shrub
Attribute_Definition_Source: Processor
Attribute:
Attribute_Label: Number
Attribute_Definition: a unique number for the marsh within the City of Chesapeake
Attribute_Definition_Source: Generated by ArcGis10.2
Attribute:
Attribute_Label: Field
Attribute_Definition:
Field observation: Yes: Observed in the field No: Could not see in the field
Attribute_Definition_Source: Field personnel
Attribute:
Attribute_Label: MarshNo
Attribute_Definition: a unique number for the marsh within Prince George County
Attribute_Definition_Source: Procesor
Attribute:
Attribute_Label: CmtyType
Attribute_Definition:
Tidal Marsh Inventories – Community Types & Field Codes Type I: Predominately Saltmarsh Cordgrass / low marsh Type II: Predominately Saltmeadow / high marsh Type III: Predominately Black Needlerush Type IV: Predominately Saltbush Type V: Predominately Big Cordgrass Type VI: Predominately Cattail Type VII: Predominately Arrow Arum - Pickerelweed Type VIII: Predominately Reed Grass Type IX: Predominately Yellow Pond Lily Type X: Predominately Saltwort Type XI: Freshwater mix - no dominant species Type XII: Brackish mix - no dominant species
Attribute_Definition_Source: Field Personnel
Attribute:
Attribute_Label: Reedgrass
Attribute_Definition:
Percent of Reedgrass (Phragmites) observed: D = Marsh 51-100% Phragmites; X = Marsh 1-50% Phragmites ;T = Marsh < 1% Phragmites
Attribute_Definition_Source: Field Personnel
Attribute:
Attribute_Label: PrcntPhrag
Attribute_Definition: Percent cover of Phragmites australis observed in marsh.
Attribute_Definition_Source: Field Personnel
Attribute:
Attribute_Label: FieldDate
Attribute_Definition: Date of field observation
Attribute_Definition_Source: Field Personnel
Attribute:
Attribute_Label: Observer
Attribute_Definition: Field personnel making the observations.
Attribute_Definition_Source: Field Personnel
Attribute:
Attribute_Label: Code
Attribute:
Attribute_Label: CommunType
Attribute_Definition:
Tidal Marsh Inventories – Community Types : Type I: Predominately Saltmarsh Cordgrass / low marsh Type II: Predominately Saltmeadow / high marsh Type III: Predominately Black Needlerush Type IV: Predominately Saltbush Type V: Predominately Big Cordgrass Type VI: Predominately Cattail Type VII: Predominately Arrow Arum - Pickerelweed Type VIII: Predominately Reed Grass Type IX: Predominately Yellow Pond Lily Type X: Predominately Saltwort Type XI: Freshwater mix - no dominant species Type XII: Brackish mix - no dominant species
Attribute_Definition_Source: Tidal Marsh Inventories – Community Types & Field Codes
Attribute:
Attribute_Label: Dominant_P
Attribute_Definition: Dominant plant species
Attribute_Definition_Source: Field Personnel
Attribute:
Attribute_Label: Acres
Attribute_Definition:
Area of wetland polygon in acres (GIS calculated in UTM zone 18)
Attribute_Definition_Source: Processor
Attribute:
Attribute_Label: County
Attribute_Definition: Virginia Jurisdiction
Attribute_Definition_Source: Processor
Metadata_Reference_Information:
Metadata_Date: 20161121
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
Comprehensive Coastal Inventory Program, Virginia Institute of Marine Science
Contact_Person: Sharon Killeen
Contact_Position: GIS Programmer/Analyst
Contact_Address:
Address_Type: mailing and physical
Address: 1375 Greate Road, P.O.Box 1346
City: Gloucester Point
State_or_Province: Virginia
Postal_Code: 23062
Country: US
Contact_Voice_Telephone: 804-684-7534
Contact_Facsimile_Telephone: 804-684-7179
Contact_Electronic_Mail_Address: sharon@vims.edu
Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Generated by mp version 2.9.12 on Mon Nov 21 12:10:09 2016