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Short Citation:
NMFS Office Of Protected Resources, 2024: Elkhorn Coral,

Item Identification

Title: Elkhorn Coral
Status: Completed
Publication Date: 2008-11-26

These data represent the critical habitat for elkhorn coral (Acropora palmata) as designated by 73 FR 72210, November 26, 2008, Rules and Regulations.


The purpose of these data is to visually represent the critical habitat areas for GIS analysis and display.


Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
ISO 19115 Topic Category
ISO 19115 Topic Category
ISO 19115 Topic Category
None Acropora palmata
None Critical Habitat
None elkhorn coral
None Endangered Species
None GIS

Spatial Keywords

Thesaurus Keyword
None Atlantic Ocean
None Broward County
None Caribbean
None Caribbean Sea
None Florida
None Florida Keys
None Miami-Dade County
None Monroe County
None Palm Beach County
None Puerto Rico
None St. Croix
None St. John
None St. Thomas
None Virgin Islands

Physical Location

City: St Petersburg
State/Province: FL

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: As Needed
Data Presentation Form: Map (digital)
Data Set Credit: CREDIT: National Marine Fisheries Service, Southeast Region ORIGINATORS: NOAA-National Marine Fisheries Service; NOAA-National Marine Fisheries Service;

Support Roles

Data Steward

CC ID: 1084348
Date Effective From: 2020-02-20
Date Effective To:
Contact (Person): Moore, Jennifer
Address: 263 13th Ave. South
St. Petersburg, FL 33701
Email Address:
Phone: 727-824-5312
Fax: 727-824-5309

Metadata Contact

CC ID: 1084350
Date Effective From: 2020-02-20
Date Effective To:
Contact (Person): Frick, Amanda L
Address: 263 13th Ave. South
St. Petersburg, FL 33701
Email Address:
Phone: 727-824-5301
Fax: 727-824-5320

Point of Contact

CC ID: 1084349
Date Effective From: 2020-02-20
Date Effective To:
Contact (Person): Frick, Amanda L
Address: 263 13th Ave. South
St. Petersburg, FL 33701
Email Address:
Phone: 727-824-5301
Fax: 727-824-5320


Currentness Reference: Publication Date

Extent Group 1

Extent Description:

ground condition

Extent Group 1 / Geographic Area 1

CC ID: 1084353
W° Bound: -83.120607
E° Bound: -64.438286
N° Bound: 26.545134
S° Bound: 17.637457

Extent Group 1 / Geographic Area 2

CC ID: 1084354
W° Bound: -83.120604
E° Bound: -64.438288
N° Bound: 26.545129
S° Bound: 17.637454

Extent Group 1 / Time Frame 1

CC ID: 1084352
Time Frame Type: Discrete
Start: 2008-11-26 00:00:00+0000

ground condition

Spatial Information

Reference Systems

Reference System 1

CC ID: 1084345

Coordinate Reference System

CRS Type: Geographic 2D
EPSG Code: EPSG:4326
EPSG Name: WGS 84
See Full Coordinate Reference System Information

Access Information

Security Class: Unclassified
Data Use Constraints:

Users be advised that the accuracy of this data set is completely dependent upon the accuracy of the shoreline and bathymetric data used in the creation process. For more details on this process, see the process description. The text description in 73 FR 72210 is always the one, true definition of Acropora critical habitat. These or any other depictions are for information purposes only and shouldn't be relied on for regulatory purposes.

Distribution Information

Distribution 1

CC ID: 1084355
Download URL:

Data access URL

File Type (Deprecated): File Geodatabase Feature Class
Distribution Format: ESRI File Geodatabase

Technical Environment


Version 6.2 (Build 9200) ; Esri ArcGIS


Process Steps

Process Step 1

CC ID: 1084339

Bathymetry source: NGDC Coastal Relief Model for Puerto Rico & Virgin Islands (Vol. 9), and Florida and Eastern Gulf of Mexico (Vol. 3). Using ESRI's ArcGIS ArcMap software and Spatial Analyst extension, ran the 'Surface Analysis' tool, 'Contour'. Set contour interval to 30 (CRM is in tenths of meters). The contour line was a bit blocky, so smoothed using ET GeoWizard (3rd party software) to smooth the contour using Bezier Curve smoothing algorithm with default settings (5 for smoothness) for the Caribbean and 10 for smoothing setting for Florida, and then cleaned. Converted the polyline to a polygon. Deleted very small polygons/ or polys for depths +/- 1m.

Process Date/Time: 2007-10-30 00:00:00

Process Step 2

CC ID: 1084340

The process of creating an outer boundary using the gridded bathymetry data produced polygons with very dense veritices. ET GeoWizards (3rd party software) was used to generalize the polygons, using the Douglas-Poiker algorithm. A generalize tolerance of .00001 arc seconds was assigned.

Process Date/Time: 2008-09-01 00:00:00

Process Step 3

CC ID: 1084341

Used detailed shoreline for Puerto Rico and the Virgin Islands from NOAA National Centers for Coastal Ocean Science (NCCOS), by selecting 'Land' and 'mangrove' polygons. Used NOAA medium resolution vector shoreline for Florida to create land polygon. Erased the bathymetry polygons with the land/mangrove polygons . For Florida shoreline, or shoreward side of the critical habitat polygon, used Florida Fish & Wildlife Commission (FWC) for nearshore bathymetry (digitized from NOAA nautical charts) for the 6 ft depth to Government Cut, FWC 1:24,000 scale shoreline, COLREG lines, and intercouncil boundary between South Atlantic and Gulf of Mexico Fishery Management Councils at the mouths of bays and inlets, and information from the U.S. Navy for exclusions. The polygon that included to the 30 meter contour was erased with the appropriate data for the shoreward side.

Process Date/Time: 2008-10-01 00:00:00

Process Step 4

CC ID: 1084342

Updated bathymetry East of St. John was added to the critical habitat layer.

Process Date/Time: 2015-05-07 00:00:00

Process Step 5

CC ID: 1084343

Repaired geometry errors in Florida area feature only.

Process Date/Time: 2021-08-30 00:00:00

Child Items

Rubric scores updated every 15m

Rubric Score Type Title
Entity CoralElkhorn_20081126

Catalog Details

Catalog Item ID: 65405
GUID: gov.noaa.nmfs.inport:65405
Metadata Record Created By: Jonathan Molineaux
Metadata Record Created: 2021-09-02 16:47+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2023-10-17 16:12+0000
Metadata Record Published: 2022-04-18
Owner Org: OPR
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2022-04-18
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2023-04-18