Geomorphology and Depositional Subenvironments of Gulf Islands National Seashore, Perdido Key and Santa Rosa Island, Florida
Entry ID: USGS_OFR_2010_1330

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Summary
Abstract: The U.S. Geological Survey (USGS) is studying coastal hazards and coastal change to improve our understanding of coastal ecosystems and to develop better capabilities of predicting future coastal change. One approach to understanding the dynamics of coastal systems is to monitor changes in barrier-island subenvironments through time. This involves examining morphologic and topographic change at temporal scales ranging from millennia to years and spatial scales ranging from tens of kilometers to meters. Of particular interest are the processes that produce those changes and the determination of whether or not those processes are likely to persist into the future. In these analyses of hazards and change, both natural and anthropogenic influences are considered. Quantifying past magnitudes and rates of coastal change and knowing the principal factors that govern those changes are critical to predicting what changes are likely to occur under different scenarios, such as short-term impacts of extreme storms or long-term impacts of sea-level rise. Gulf Islands National Seashore was selected for detailed mapping of barrier-island morphology and topography because the islands offer a diversity of depositional subenvironments and because island areas and positions have changed substantially in historical time. The geomorphologic and subenvironmental maps emphasize the processes that formed the surficial features and also serve as a basis for documenting which subenvironments are relatively stable, such as the vegetated barrier core, and those which are highly dynamic, such as the beach and inactive overwash zones.

The primary mapping procedures were supervised functions within a Geographic Information System (GIS) that were applied to delineate and classify depositional subenvironments and features, collectively referred to as map units. The delineated boundaries of the map units were exported to create one shapefile, and are differentiated by the field "Type" in the associated attribute table. Map units were delineated and classified based on differences in tonal patterns of features in contrast to adjacent features observed on orthophotography. Land elevations from recent lidar surveys served as supplementary data to assist in delineating the map unit boundaries.

[Summary provided by the USGS.]

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Link: GET DATA
Description: Access the GIS data for the Geomorphology and Depositional Subenvironments of Gulf Islands National Seashore, Perdido Key and Santa Rosa Island, Florida.


Link: GET DATA
Description: Project maps for the GIS data for the Geomorphology and Depositional Subenvironments of Gulf Islands National Seashore, Perdido Key and Santa Rosa Island, Florida.


Link: VIEW EXTENDED METADATA
Description: FGDC metadata for the GIS data for the Geomorphology and Depositional Subenvironments of Gulf Islands National Seashore, Perdido Key and Santa Rosa Island, Florida.


Geographic Coverage
 N: 30.406206 S: 30.29735  E: -86.510414  W: -87.42046

Data Set Citation
Dataset Originator/Creator: Robert A. Morton and Marilyn C. Montgomery
Dataset Title: Geomorphology and Depositional Subenvironments of Gulf Islands National Seashore, Perdido Key and Santa Rosa Island, Florida
Dataset Series Name: U.S. Geological Survey Open-File Report
Dataset Release Date: 2010
Dataset Release Place: St. Petersburg, FL
Dataset Publisher: U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center
Issue Identification: OFR 2010-1330
Data Presentation Form: vector digital data
Online Resource: http://pubs.usgs.gov/of/2010/1330/


Temporal Coverage
Start Date: 2010-01-01
Stop Date: 2010-12-31


Location Keywords
OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN > GULF OF MEXICO
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > FLORIDA


Science Keywords
HUMAN DIMENSIONS >INFRASTRUCTURE >BUILDINGS    [Definition]
HUMAN DIMENSIONS >INFRASTRUCTURE >TRANSPORTATION    [Definition]
OCEANS >COASTAL PROCESSES >BARRIER ISLANDS    [Definition]
OCEANS >COASTAL PROCESSES >BEACHES    [Definition]
OCEANS >COASTAL PROCESSES >EROSION    [Definition]
OCEANS >COASTAL PROCESSES >INTERTIDAL ZONE    [Definition]
OCEANS >COASTAL PROCESSES >MARSHES    [Definition]
OCEANS >COASTAL PROCESSES >SEA LEVEL RISE    [Definition]
OCEANS >COASTAL PROCESSES >SEA SURFACE HEIGHT    [Definition]
OCEANS >COASTAL PROCESSES >SEDIMENT TRANSPORT    [Definition]
OCEANS >COASTAL PROCESSES >SEDIMENTATION    [Definition]
OCEANS >COASTAL PROCESSES >SHORELINE DISPLACEMENT    [Definition]
OCEANS >COASTAL PROCESSES >SHORELINES    [Definition]
OCEANS >COASTAL PROCESSES >STORM SURGE    [Definition]


ISO Topic Category
BIOTA
INLAND WATERS


Access Constraints
None


Use Constraints
Feature locational accuracy not guaranteed at scales larger than 1:10,000. The U.S. Geological Survey should be acknowledged as the originator in any further work derived from this dataset.


Keywords
GIS
Geographic Information Systems
geology
geomorphology
depositional subenvironment


Data Set Progress
COMPLETE


Originating Center
USGS


Data Center
St. Petersburg Coastal and Marine Science Center, Coastal and Marine Geology, U.S. Geological Survey, U.S. Department of the Interior    [Information]
Data Center URL: http://coastal.er.usgs.gov/

Data Center Personnel
Name: USGS ST. PETERSBURG COASTAL AND MARINE SCIENCE CENTER
Phone: 727-803-8747
Fax: 727-803-2030
Contact Address:
600 Fourth Street South
City: St. Petersburg
Province or State: FL
Postal Code: 33701-4846
Country: USA



Distribution
Distribution_Media: Online
Distribution_Size: 5.2 MB
Fees: No fees


Personnel
ROBERT. A. MORTON
Role: INVESTIGATOR
Phone: 727-803-8747 x3080
Email: rmorton at usgs.gov
Contact Address:
Coastal and Marine Geology Team
U.S. Geological Survey
600 4th Street South
City: St. Petersberg
Province or State: FL
Postal Code: 33701
Country: USA


MARILYN C. MONTGOMERY
Role: INVESTIGATOR
Phone: 727-803-8747
Email: mmontgomery at usgs.gov
Contact Address:
600 4th Street South
City: St. Petersburg
Province or State: FL
Postal Code: 33701
Country: U.S.


TYLER B. STEVENS
Role: DIF AUTHOR
Phone: (301) 614-6898
Fax: 301-614-5268
Email: Tyler.B.Stevens at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Global Change Master Directory
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA



Creation and Review Dates
DIF Creation Date: 2011-02-03
Last DIF Revision Date: 2011-02-04

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