NOAA Office for Coastal Management Coastal Inundation Digital Elevation Model: New Jersey Southern

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 New Jersey, 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 Atlantic, Camden, Cape May, Cumberland, Gloucester, and Salem Counties.

The DEM was produced from the following lidar data sets:

1. 2018 New Jersey South Jersey FEMA

2. 2018 NJ Southern NJ

3. 2015 USGS Delaware Valley

4. 2014 NGS Coastal Mapping Program Topobathy Lidar: Post-Sandy Atlantic Seaboard

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.

10953

Source data and their associated metadata are available at the following URLs:

1. 2018 New Jersey South Jersey FEMA

Metadata: https://www.fisheries.noaa.gov/inport/item/63238

Data Download: https://coast.noaa.gov/htdata/lidar4_z/geoid18/data/9202/

2. 2018 NJ Southern NJ

Metadata: https://www.fisheries.noaa.gov/inport/item/63238

Data Download: https://coast.noaa.gov/htdata/lidar4_z/geoid18/data/9202/

3. 2015 USGS Delaware Valley

Metadata: http://viewer.nationalmap.gov/basic

Data Download: http://viewer.nationalmap.gov/basic

4. 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

Driver: GTiff/GeoTIFF

Files: NJ_Southern_GCS_3m_NAVDm_FY21Update.tif

Size is 49776, 44875

Coordinate System is:

GEOGCS["NAD83",

DATUM["North_American_Datum_1983",

SPHEROID["GRS 1980",6378137,298.2572221010042,

AUTHORITY["EPSG","7019"]],

AUTHORITY["EPSG","6269"]],

PRIMEM["Greenwich",0],

UNIT["degree",0.0174532925199433],

AUTHORITY["EPSG","4269"]]

Origin = (-75.572337963026811,39.997112551460688)

Pixel Size = (0.000026949458524,-0.000026949458524)

Metadata:

AREA_OR_POINT=Area

Image Structure Metadata:

COMPRESSION=DEFLATE

INTERLEAVE=BAND

Corner Coordinates:

Upper Left ( -75.5723380, 39.9971126) ( 75d34'20.42"W, 39d59'49.61"N)

Lower Left ( -75.5723380, 38.7877556) ( 75d34'20.42"W, 38d47'15.92"N)

Upper Right ( -74.2309017, 39.9971126) ( 74d13'51.25"W, 39d59'49.61"N)

Lower Right ( -74.2309017, 38.7877556) ( 74d13'51.25"W, 38d47'15.92"N)

Center ( -74.9016198, 39.3924341) ( 74d54' 5.83"W, 39d23'32.76"N)

Band 1 Block=512x512 Type=Float32, ColorInterp=Gray

Description = Layer_1

Min=-99.000 Max=76.827

Minimum=-99.000, Maximum=76.827, Mean=-11.932, StdDev=0.000

NoData Value=-9999

Overviews: 24888x22438, 12444x11219, 6222x5610, 3111x2805, 1556x1403

Metadata:

LAYER_TYPE=athematic

STATISTICS_MAXIMUM=76.827087402344

STATISTICS_MEAN=-11.932267308577

STATISTICS_MEDIAN=-11.932267308577

STATISTICS_MINIMUM=-99

STATISTICS_MODE=-11.932267308577

STATISTICS_STDDEV=0

Any conclusions drawn from the analysis of this information are not the responsibility of the NOAA Office for Coastal Management or its partners.

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.

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.

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.

Data covers the tile scheme provided for the project area. Elevation data checked for anomalous elevation values outside expected range.