Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Office for Coastal Management (OCM)
201608
NOAA Office for Coastal Management Coastal Inundation Digital Elevation Model: Virginia, Southern
Raster
Charleston, SC
NOAA's Ocean Service, Office for Coastal Management (OCM)
https://coast.noaa.gov/slr
https://coast.noaa.gov/digitalcoast/tools/slr
https://coast.noaa.gov/slrdata
https://coast.noaa.gov
These data were created as part of the National Oceanic and Atmospheric Administration Office for Coastal Management's efforts to create an online mapping viewer called the Sea Level Rise and Coastal Flooding Impacts Viewer. It depicts potential sea level rise and its associated impacts on the nation's coastal areas. The purpose of the mapping viewer is to provide coastal managers and scientists with a preliminary look at sea level rise and coastal flooding impacts. The viewer is a screening-level tool that uses nationally consistent data sets and analyses. Data and maps provided can be used at several scales to help gauge trends and prioritize actions for different scenarios. The Sea Level Rise and Coastal Flooding Impacts Viewer may be accessed at: https://coast.noaa.gov/slr.
This metadata record describes the Virginia, Southern digital elevation model (DEM), which is a part of a series of DEMs produced for the National Oceanic and Atmospheric Administration Office for Coastal Management's Sea Level Rise and Coastal Flooding Impacts Viewer described above. This DEM includes the best available lidar known to exist at the time of DEM creation that met project specifications. This DEM includes data for Chesapeake, Chesterfield, Colonial Heights, Franklin City, Hopewell, Isle of Wight, Norfolk, Petersburg, Portsmouth, Prince George, Richmond City, Southampton, Suffolk, Surry, and Virginia Beach Counties.
The DEM was produced from the following lidar data sets:
1. 2014 NGS Coastal Mapping Program Topobathy Lidar: Post-Sandy Atlantic Seaboard
2. 2013 USGS Norfolk, VA Lidar
3. 2014 Virginia Hurricane Sandy QL2 Lidar
4. 2011 FEMA Virginia Lidar
5. 2010 ARRA-VA 11County
The DEM is referenced vertically to the North American Vertical Datum of 1988 (NAVD88) with vertical units of meters and horizontally to the North American Datum of 1983 (NAD83). The resolution of the DEM is approximately 3 meters.
The NOAA Office for Coastal Management has developed high-resolution digital elevation models (DEMs) for use in the Office's Sea Level Rise and Coastal Flooding Impacts internet mapping application. These DEMs serve as source datasets used to derive data to visualize the impacts of inundation resulting from sea level rise along the coastal United States and its territories.
Source data and their associated metadata are available at the following URLs:
1. 2014 NGS Coastal Mapping Program Topobathy Lidar: Post-Sandy Atlantic Seaboard
Metadata: https://coast.noaa.gov/htdata/lidar1_z/geoid12b/data/4800/2014_NGS_postSandy_topobathy_metadata.html
Data Download: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=4800
2. 2013 USGS Norfolk, VA Lidar
Metadata: http://viewer.nationalmap.gov/basic/
Data Download: http://viewer.nationalmap.gov/basic/
3. 2014 Virginia Hurricane Sandy QL2 Lidar
Metadata: http://viewer.nationalmap.gov/basic/
Data Download: http://viewer.nationalmap.gov/basic/
4. 2011 FEMA Virginia Lidar
Metadata: http://viewer.nationalmap.gov/basic/
Data Download: http://viewer.nationalmap.gov/basic/
5. 2010 ARRA-VA 11County
Metadata: http://viewer.nationalmap.gov/basic/
Data Download: http://viewer.nationalmap.gov/basic/
2010
2014
ground condition
None planned
-77.5030337215
-75.7963784121
37.5677226288
36.54288862
ISO 19115 Topic Category
elevation
None
Bathymetry/Topography
elevation
Digital Elevation Model
DEM
lidar
inundation
flooding
lidar
topography
sea level rise
None
US
Virginia
Chesapeake County
Chesterfield County
Colonial Heights County
Franklin City
Chesapeake County
Hopewell County
Isle of Wight County
Norfolk County
Petersburg County
Portsmouth County
Prince George County
Richmond City
Southampton County
Suffolk County
Surry County
Virginia Beach County
None
The dataset is provided as is, without warranty to its performance, merchantable state, or fitness for any particular purpose. The entire risk associated with the results and performance of this dataset is assumed by the user. This dataset should be used strictly as a planning reference and not for navigation, permitting, or other legal purposes.
Acknowledgment of the NOAA Office for Coastal Management as a data source would be appreciated in products developed from these data, and such acknowledgment, as is standard for citation and legal practices for data source, is expected.
Data covers the tile scheme provided for the project area. Elevation data checked for anomalous elevation values outside expected range.
A visual qualitative check was performed to ensure data completeness. All available lidar data known at the time of DEM creation that meets project specifications has been used to develop the DEM. Known data gaps may exist where lidar coverage was incomplete.
The DEM is derived from the source lidar data. Horizontal accuracy testing is not performed on the DEM. Lidar source data assumed to meet 1 meter horizontal accuracy.
The DEM is derived from the source lidar data. Vertical accuracy is not tested on the DEM. Project specifications require all source lidar data used in constructing the DEM to meet FEMA Specifications for Flood Hazard Mapping.
The source elevation datasets listed above were identified, downloaded, edited, and finalized.
2016
Source elevation data and their associated hydro-breaklines, where available, were downloaded. Data were then reviewed and edited to meet the project's requirements. The major requirements were delineating streams 10m or greater in width, removing bridges over streams greater than 10m wide, flattening inland water bodies, and converting data referenced to an older geoid to the current geoid, Geoid 12B. NOAA's VDatum datum conversion tool was used to convert geoids. Ocean-connected water areas were removed from data prior to final mosaicking. Data were then mosaicked together based on date, with the most recent data taking priority. Ocean-connected water areas were given a value of -99 to standardize this area's value across sources, to flatten water for mapping, and to make it easy for users to remove ocean-connected water if desired.
2016
Raster
Grid Cell
38028
63328
1
0.000027
0.000027
Decimal degrees
North American Datum of 1983
Geodetic Reference System 80
6378137.000000
298.257222101
North American Vertical Datum of 1988
0.001
meters
Explicit elevation coordinate included with horizontal coordinates
NOAA Office for Coastal Management
mailing and physical
2234 South Hobson Ave.
Charleston
SC
29405-2413
843-740-1202
coastal.info@noaa.gov
Downloadable Data
Any conclusions drawn from the analysis of this information are not the responsibility of the NOAA Office for Coastal Management or its partners.
20160801
NOAA Office for Coastal Management
mailing and physical
2234 South Hobson Avenue
Charleston
SC
29405-2413
843-740-1202
coastal.info@noaa.gov
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998