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Summary

Short Citation
OCM Partners, 2025: Topobathymetric Model of the Northern Gulf of Mexico, 1888 to 2013, https://www.fisheries.noaa.gov/inport/item/49466.
Full Citation Examples

Abstract

Accurate, high-resolution elevation information is vital to understanding the highly dynamic Northern Gulf Coast,

with Louisiana being the location of North America's largest delta system, and the focus of one of the largest coastal restoration

and flood risk reduction efforts in the U.S. (State of Louisiana, 2012). The U.S. Geological Survey's (USGS) Coastal and Marine

Geology Program (CMGP) and the National Geospatial Program (NGP) collaborated with the Coastal Protection and Restoration

Authority of Louisiana (CPRA) and a number of other federal and state agencies to create a comprehensive topobathymetric

elevation model for the Northern Gulf of Mexico (NGOM). The new dataset consists of a detailed and highly accurate elevation model

incorporating the best available multi-source topographic and bathymetric elevation data for the Northern Gulf of Mexico (NGOM).

The NGOM topobathymetric elevation model integrates over 400 different data sources including topographic and bathymetric LiDAR

point clouds, hydrographic surveys, side-scan sonar surveys, and multibeam surveys obtained from USGS, NOAA, the State of Louisiana,

the U.S. Army Corps of Engineers, FEMA, and other agencies.

The LiDAR and bathymetry surveys were sorted and prioritized based on survey date, accuracy, spatial distribution, and point density to

develop a model based on the best available elevation data. Because bathymetric data is typically referenced to tidal datums (such as

Mean High Water or Mean Sea Level), all tidally-referenced heights were transformed into orthometric heights that are normally used

for mapping elevation on land (based on the North American Vertical Datum of 1988). The spatial resolution is 3 meters and extends from

the Florida/Alabama border on the east to the Louisiana/Texas border on the west. The temporal range of the input topography and

bathymetry is 1888 to 2013.

Original contact information:

Contact Name: Jeffrey Danielson

Contact Org: U.S. Geological Survey

Title: Physical Geographer

Phone: 605-594-6148

Email: daniels@usgs.gov

Distribution Information

Access Constraints:

Any acquisition or use of these data signifies a user's agreement to comprehension and compliance of the USGS Standard Disclaimer.

Ensure all portions of metadata are read and clearly understood before using these data in order to protect both user and USGS interests.

Use Constraints:

There is no guarantee or warranty concerning the accuracy of the data. Users should be aware that temporal changes may have

occurred since these data were collected and that some parts of these data may no longer represent actual surface conditions. Users should not use

these data for critical applications without a full awareness of its limitations. These data should not be used for navigation purposes.

Acknowledgement of the originating agencies would be appreciated in products derived from these data. Any user who modifies the data is obligated

to describe the types of modifications they perform. User specifically agrees not to misrepresent the data, nor to imply that changes made were

approved or endorsed by the USGS. Please refer to http://www.usgs.gov/privacy.html for the USGS disclaimer.

Controlled Theme Keywords

BATHYMETRY, COASTAL ELEVATION, elevation, TOPOGRAPHICAL RELIEF MAPS

Child Items

No Child Items for this record.

Contact Information

Point of Contact
NOAA Office for Coastal Management (NOAA/OCM)
coastal.info@noaa.gov
(843) 740-1202
https://coast.noaa.gov

Metadata Contact
NOAA Office for Coastal Management (NOAA/OCM)
coastal.info@noaa.gov
(843) 740-1202
https://coast.noaa.gov

Extents

Geographic Area 1

-75.149816° W, -74.383026° E, 40.192277° N, 39.53345° S

Time Frame 1
1888 - 2013