Mid-Atlantic Region Bathymetry

Raster Dataset


bathymetry, depth, oceanography


Comprehensive bathymetry data compiled primarily for regional ocean planning purposes.


This raster dataset represents region-wide bathymetry data that covers the entire Mid-Atlantic region out to the Exclusive Economic Zone (EEZ). It was compiled by The Nature Conservancy primarily from NOAA's Coastal Relief Model and Atlantic margin bathymetry data compiled by the Center for Coastal and Ocean Mapping/Joint Hydrographic Center, University of New Hampshire. The raster cell size is approximately 100 meters.


NOAA, Center for Coastal and Ocean Mapping/Joint Hydrographic Center, The Nature Conservancy

Use limitations

Not to be used for navigation.


West -76.508351   East -65.699541
North 41.400408   South 34.803178

Scale Range
Maximum (zoomed in) 1:50,000
Minimum (zoomed out) 1:150,000,000

ArcGIS Metadata 

Topics and Keywords 

Themes or categories of the resource  oceans

*Content type  Downloadable Data
Export to FGDC CSDGM XML format as Resource Description No

Theme keywords  bathymetry, water depth, seafloor topography


Title Mid-Atlantic Region Bathymetry
Creation date 2016-06-14 00:00:00

Presentation formats* digital map

Resource Details 

Dataset languages* English (UNITED STATES)

Spatial representation type* grid

*Processing environment Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS

NOAA, Center for Coastal and Ocean Mapping/Joint Hydrographic Center, The Nature Conservancy

ArcGIS item properties
*Name regional_bathymetry.img
*Location file://K:\Ongoing_Projects\MARCO\bathymetry\regional_bathymetry.img
*Access protocol Local Area Network


Geographic extent
Bounding rectangle
Extent type  Extent used for searching
*West longitude -76.508351
*East longitude -65.699541
*North latitude 41.400408
*South latitude 34.803178
*Extent contains the resource Yes

Extent in the item's coordinate system
*West longitude -8516870.702928
*East longitude -7313639.470301
*South latitude 4137165.941075
*North latitude 5071582.404016
*Extent contains the resource Yes

Resource Constraints 

Limitations of use

Not to be used for navigation.

Spatial Reference 

ArcGIS coordinate system
*Type Projected
*Geographic coordinate reference GCS_WGS_1984
*Projection WGS_1984_Web_Mercator_Auxiliary_Sphere
*Coordinate reference details
Projected coordinate system
Well-known identifier 102100
X origin -20037700
Y origin -30241100
XY scale 148923141.92838538
Z origin -100000
Z scale 10000
M origin -100000
M scale 10000
XY tolerance 0.001
Z tolerance 0.001
M tolerance 0.001
High precision true
Latest well-known identifier 3857
Well-known text PROJCS["WGS_1984_Web_Mercator_Auxiliary_Sphere",GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Mercator_Auxiliary_Sphere"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",0.0],PARAMETER["Standard_Parallel_1",0.0],PARAMETER["Auxiliary_Sphere_Type",0.0],UNIT["Meter",1.0],AUTHORITY["EPSG",3857]]

Reference system identifier
Dimension horizontal
*Value 3857
*Codespace EPSG
*Version 8.6.2

Spatial Data Properties 

Georectified Grid
*Number of dimensions 2

Axis dimensions properties
Dimension type  column (x-axis)
*Dimension size 11499
*Resolution  104.637902 m (meter)

Axis dimensions properties
Dimension type  row (y-axis)
*Dimension size 8930
*Resolution  104.637902 m (meter)

*Cell geometry  area
*Point in pixel  center

*Transformation parameters are available Yes

*Check points are available No

Corner points
*Point -8516870.702928 4137165.941075
*Point -8516870.702928 5071582.404016
*Point -7313639.470301 5071582.404016
*Point -7313639.470301 4137165.941075

*Center point -7915255.086614 4604374.172546

ArcGIS Raster Properties
General Information
*Pixel depth 16
*Compression type RLE
*Number of bands 1
*Raster format IMAGINE Image
*Source type continuous
*Pixel type signed integer
*No data value -32768
*Has colormap No
*Has pyramids No

Spatial Data Content 

Image Description
*Type of information  image
Attribute described by cell values Depth in meters

Band information
*Description Layer_1
*Maximum value -1.000000
*Minimum value -4442.000000

*Number of bits per value 16

Triangulation has been performed No
Radiometric calibration is available No
Camera calibration is available No
Film distortion information is available No
Lens distortion information is available No


Process step
When the process occurred 2016-06-14 00:00:00
Coastal Relief Model data for the Mid-Atlantic region were downloaded from the NOAA/NCEI Grid Extract viewer. Elevations less than 0 were extracted and the dataset was projected to Web Mercator Auxiliary Sphere. Similarly, bathymetry data from CCOM-JHC for the U.S. Atlantic Continental Margin were downloaded and projected. The Mosaic to New Raster tool in ArcGIS was used to merge these two datasets, with the CCOM-JHC data taking precedence where there was overlap. In a few very small areas not covered by either dataset, NOAA's ETOPO1 data was incorporated. The Extract by Mask tool in ArcGIS was then used to "clip" the raster data to the EEZ boundary.

Source data
Relationship to the process step used

CCOM/JHC bathymetric survey data

Source citation
Title U.S. UNCLOS Bathymetry Project
Publication date 2013-03-29 00:00:00

Resource location online

Source data
Relationship to the process step used

Bathymetry data extracted from the U.S. Coastal Relief Model

Source citation
Title U.S. Coastal Relief Model

Resource location online


Distribution format
*Name Raster Dataset
Version n/a


Details for object regional_bathymetry.img.vat 
*Type Table
*Row count 4442

Field OID
*Alias OID
*Data type OID
*Width 4
*Precision 0
*Scale 0
*Field description
Internal feature number.

*Description source

*Description of values
Sequential unique whole numbers that are automatically generated.

Field Value
*Alias Value
*Data type Integer
*Width 10
*Precision 10
*Scale 0
Field description
Depth in meters

Description source

Field Count
*Alias Count
*Data type Double
*Width 19
*Precision 0
*Scale 0

Metadata Details 

*Metadata language English (UNITED STATES)
*Metadata character set  utf8 - 8 bit UCS Transfer Format

Metadata identifier A874AE83-49E7-4253-8868-D19BE11705FD

Scope of the data described by the metadata* dataset
Scope name* dataset

*Last update 2016-06-15

ArcGIS metadata properties
Metadata format ArcGIS 1.0
Metadata style North American Profile of ISO19115 2003
Standard or profile used to edit metadata NAP

Created in ArcGIS for the item 2016-06-15 11:50:46
Last modified in ArcGIS for the item 2016-06-15 15:32:01

Automatic updates
Have been performed Yes
Last update 2016-06-15 14:46:43

Metadata Contacts 

Metadata contact
Individual's name Chris Bruce
Organization's name The Nature Conservancy
Contact's position GIS Manager
Contact's role  processor

Contact information
e-mail addresscbruce@tnc.org

Thumbnail and Enclosures 

Thumbnail type  JPG