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20231106
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20231106
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FGDC CSDGM Metadata
1.0
150000000
5000
ISO19139
ESRI ArcCatalog 9.3.1.3000
en
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 2009 a new Tidal Marsh Inventory has been developed for the York River Watershed in 2010. The remaining tidal shoreline of Gloucester County was developed using color infra-red imagery from 2011. 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. This will provide an opportunity to review changes that have occurred in the marshes over time.
To maintain and update an inventory of the distribution of tidal marshes for the Commonwealth of Virginia.
Imagery used to generate the tidal marsh boundaries is a product of the Virginia Base Mapping Program of the Virginia Information Technology Agency.
Comprehensive Coastal Inventory Program
2010
Gloucester County Tidal Marsh Inventory 2010/2014
york_river_watershed_tmi
vector digital data
http://ccrm.vims.edu/gis_data_maps
ground condition
6/17/2010
6/21/2010
6/22/2010
6/23/2010
6/24/2010
6/25/2010
6/28/2010
6/29/2010
6/30/2010
7/1/2010
7/6/2010
7/7/2010
7/8/2010
7/12/2010
7/13/2010
7/15/2010
7/22/2010
7/23/2010
None planned
-77.135576
-76.351098
37.796746
37.189392
311945.726421
380098.216785
4117984.722035
4184137.321097
York River
Gloucester County
York County
James City County
King and Queen County
New Kent County
King William County
Pamunkey River
Mattaponi River
Tidal Marsh, Wetland Plant Identification, Wetland Community Type
none
The boundaries should not be used for jurisdictional determineations.
Shapefile
Sharon Killeen
Center for Coastal Resources Management
GIS Programmer/Analyst
mailing and physical address
P.O.Box 1346 Greate Road
Gloucester Point
Virginia
23062
USA
804-684-7534
804-684-7179
sharon@vims.edu
Esri ArcGIS 13.0.2.36056
Gloucester County Tidal Marsh Inventory 2010/2014
2014-12-31T00:00:00
311945.726421
380098.216785
4184137.321097
4117984.722035
1
-77.135576
-76.351098
37.796746
37.189392
1
002
1
-76.706259
-76.351944
37.575133
37.243577
To maintain and update an inventory of the distribution of tidal marshes for the Commonwealth of Virginia.
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>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 2009 a new Tidal Marsh Inventory has been developed for the York River Watershed in 2010. The remaining tidal shoreline of Gloucester County was developed using color infra-red imagery from 2011. 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. This will provide an opportunity to review changes that have occurred in the marshes over time.</SPAN></P></DIV></DIV></DIV>
Tidal marsh
Inventory
Watershed
Marsh Community Type
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The boundaries should not be used for jurisdictional determineations.</SPAN></P></DIV></DIV></DIV>
Gloucester County Tidal Marsh Inventory 2014
2014-12-31T00:00:00
Tidal Marsh, Wetland Plant Identification, Wetland Community Type
Aberdeen Creek, Adams Creek, Carter Creek, Cedarbush Creek, Mobjack Bay, North River, Perrin River, Piankatank River, Poropotank River, Sarah Creek, Severn River, Timberneck Creek, Ware River, York River
en
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
local time
Sharon Killeen
Comprehensive Coastal Inventory Program
mailing and physical address
Gloucester Point
VA
23062
P.O.Box 1346 Greate Road
USA
804-684-7534
GIS Programmer/Analyst
804-684-7179
sharon@vims.edu
20120104
ISO 19115 Geographic Information - Metadata
DIS_ESRI1.0
dataset
Downloadable Data
68.786
68.786
File Geodatabase Feature Class
Shapefile
9.554
Vector
Simple
FALSE
0
TRUE
FALSE
GCS_North_American_1983
NAD_1983_UTM_Zone_18N
coordinate pair
meters
0.000000
0.000000
North American Datum of 1983
Geodetic Reference System 80
6378137.000000
298.257222
NAD_1983_UTM_Zone_18N
EPSG
6.11(3.0.1)
0
Marsh_RPA_Buffer_Merge
Feature Class
0
Polygon
ESRI
OBJECTID
OBJECTID
OID
4
0
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
Shape
Geometry
0
0
0
Feature geometry.
ESRI
Coordinates defining the features.
ID
ID
Integer
4
0
0
AREA
AREA
Double
8
0
0
NEW_ID
NEW_ID
Double
8
0
0
TMI_NO
TMI_NO
Double
8
0
0
MFIPS
MFIPS
Double
8
0
0
TMI_TYPE
TMI_TYPE
Integer
4
0
0
COMMENTS
COMMENTS
String
28
0
0
marshclass
marshclass
String
30
0
0
Marsh_Type
Marsh_Type
String
50
0
0
Number
Number
Integer
4
0
0
Field2014
Field2014
String
4
0
0
Field2010
Field2010
String
5
0
0
County
County
String
5
0
0
F10Field14
10Field14
String
5
0
0
MarshNo
MarshNo
Double
8
0
0
CmtyType
CmtyType
String
254
0
0
Reedgrass
Reedgrass
String
254
0
0
PrcntPhrag
PrcntPhrag
String
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0
0
FieldDate
FieldDate
Date
8
0
0
Observer
Observer
String
254
0
0
Comment
Comment
String
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0
0
CommunType
CommunType
String
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0
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Dominant_P
String
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0
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acres
acres
Double
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8
0
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Length of feature in internal units.
Esri
Positive real numbers that are automatically generated.
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Shape_Area
Double
8
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Area of feature in internal units squared.
Esri
Positive real numbers that are automatically generated.
20231106
The 2010 TMI (Tidal Marsh Inventory) shapefile for the York River Watershed was created by visual photo interpretation and heads up digitizing of recent (2009) high resolution (6") infrared aerial photography at a scale of 1:1000. This scale was picked as a compromise between taking full advantage of the resolution and time constraints. Marsh information from previous shoreline surveys was used, particularly in identifying narrow fringe marshes. The latest NWI was also used. This delineation was completed prior to the fieldwork and then corrected as noted in the field.
Sharon Killeen
Comprehensive Coastal Inventory
GIS Programmer/Analyst
mailing and physical address
P.O.Box 1346 Greate Road
Gloucester Point
VA
23062
USA
804-684-7534
804-684-7179
sharon@vims.edu
withheld
withheld
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Marcia Berman
Comprehensive Coastal Inventory Program, Virginia Institute of Marine Science
Director of Comprehensive Coastal Inventory Program
P.O.Box 1346
Gloucester Point
Virginia
23062
marcia@vims.edu
US
804-684-7188
804-684-7179
Tidal marshes were delineated from 2011 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 first Gloucester County Inventory in Gloucester County (in 1976). Quality assurance and control measures were performed prior to generation of maps for fieldwork.
2014-03-01T00:00:00
VBMP imagery, with the marsh polygon layer overlay, was printed for use in field surveys of the marshes.
2014-03-01T00:00:00
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.
2014-06-01T00:00:00
Corrections were made to the digital data back at the lab using ArcGis Version 10.0
2014-09-01T00:00:00