GIS Data: 2024 Northumberland County, Virginia - Shoreline Inventory, Coastal Natural Buffers, & Marsh Migration Corridors
Nunez, Karinna Rudnicky, Tamia Hendricks, Jessica Duning, Catherine R. Hill, Evan Graulich, Jack Killeen, Sharon
Nunez, Karinna
Rudnicky, Tamia
Hendricks, Jessica
Duning, Catherine R.
Hill, Evan
Graulich, Jack
Killeen, Sharon
Abstract
The 2024 Shoreline Inventory, Coastal Natural Buffers, and Migration Corridors layers for the City of Northumberland were generated using on- screen, digitizing techniques in ArcGIS® Pro v. 3.x while viewing conditions observed in Bing high-resolution oblique imagery, Google Earth, and 2021 imagery from the Virginia Base Mapping Program (VBMP). A geodatabase was developed named Northumberland_ShlInventory_NatBuffers_MarshCorridors_2024 containing the following eight features classes displaying bank conditions, shoreline features, natural buffers, and marsh migration corridors: Northumberland_BankHeightSlope_2024, Northumberland_RecreationalStructures_2024, Northumberland_ErosionControlStructures_2024_Line, Northumberland_ErosionControlStructures_2024_Polygon, Northumberland_BeachesAndDunes_2024, Northumberland_TMI_2024, Northumberland_MarshMigrationCorridors_2ft_2024 and Northumberland_MarshMigrationCorridors_4ft_2024.
Description
Geodatabase: Northumberland_ShlInventory_NatBuffers_MarshCorridors_2024
Feature classes.
Northumberland_BankHeightSlope_2024 - a polyline feature class
containing bank height category and slope for segments of the upland
shoreline.
Northumberland_RecreationalStructures_2024 - a polygon feature
class with locations of docks, community docks, dilapidated docks, private and public boat ramps, jetties, marinas (< 50 and > 50 slips), and wharves.
Northumberland_ErosionControlStructures_2024_Line (Shoreline
Protection Structures & Living Shoreline Treatments) - a line feature
class delineating hardened shoreline structures that are used for
erosion control (i.e., revetment, sill, bulkhead, breakwaters, groins,
unconventional, oyster structures, and dilapidated bulkhead), as well
as living shoreline treatments (breakwater with beach nourishment,
marsh with sill, marsh with oyster structures [oyster bags,
manufactured, natural materials), constructed oyster reef and coir
logs).
Northumberland_ErosionControlStructures_2024_Polygon
(Shoreline Protection Structures & Living Shoreline Treatments) - a
polygon feature class delineating hardened shoreline structures that
are used for erosion control (i.e., revetment, sill, bulkhead,
breakwaters, groins, unconventional, oyster structures, and
dilapidated bulkhead), as well as living shoreline treatments
(breakwater with beach nourishment, marsh with sill, marsh with
oyster structures [oyster bags, manufactured, natural materials),
constructed oyster reef and coir logs).
Northumberland_BeachesAndDunes_2024 - a polygon feature
class that delineates the location of beaches and dunes.
Northumberland_TMI_2024 - a polygon feature class that shows the
location, size, and community type of tidal marshes. In 2023, the tidal
marsh inventory update began in conjunction with the shoreline
inventory update. Marsh boundaries (updated marsh extent and
distribution) were identified and mapped remotely using high-
resolution color imagery from the Virginia Base Map Program
(VBMP). Plant community types and other historical data from the
previous inventory were maintained for marshes that intersected the
same geographic location. New marshes were initially classified as
having an "undetermined" plant community type. This classification
was only updated if high-resolution aerial imagery or drone-based
photography provided conclusive evidence of the specific plant
communities present.
Northumberland_MarshMigrationCorridors_2ft_2024 &
Northumberland_MarshMigrationCorridors_4ft_2024- Polygons
that show the potential area of the current upland expected to
become marsh under 2ft and 4ft sea level rise scenario. This layer is
the result of combining the outputs from four existing marsh migration
models into marsh migration corridor envelopes.
The metadata file is embedded in the geodatabase and defines attribute
accuracy, data development, and any use restrictions that pertain to data.
Disclaimer: The Center for Coastal Resources Management (CCRM) provides these data with the understanding that they are not guaranteed to be correct or complete, and conclusions drawn from the data set are the sole responsibility of the user. Every attempt has been made to ensure that these data and the documentation are reliable and accurate. CCRM, the Virginia Institute of Marine Science (VIMS), and the Virginia Department of Environmental Quality, Virginia Coastal Zone Management Program assume no liability for any damages caused by inaccuracies in the data or documentation; and make no warranty, express or implied, as to the accuracy, completeness, or utility of this information, nor does the fact of distribution constitute a warranty.
Date
2024-09-30
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Keywords
Center for Coastal Resources Management (CCRM)
CCRM GIS Data, Shoreline Inventory, Tidal Marsh Inventory, Coastal Natural Buffers, Marsh Migration Corridors.
Citation
Nunez, K., Rudnicky, T., Hendricks, J., Duning, C., Hill, E., Graulich, J., Killeen, S. (2024). GIS Data – 2024 Northumberland County, Virginia. Shoreline Inventory, Coastal Natural Buffers, & Marsh Migration Corridors. Center for Coastal Resources Management, Virginia Institute of Marine Science, William & Mary.
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Department
Virginia Institute of Marine Science
DOI
https://doi.org/10.25773/frdc-d079