Kara S. Doran
Justin J. Birchler
Kirsten J. Bendik
20210916
Hurricane Irma Overwash Extents (version 2.0, 20210916)
2.0
vector digital data
Kara S. Doran
Justin J. Birchler
Kirsten J. Bendik
20190813
Storm-Induced Overwash Extent
U.S. Geological Survey data release
doi:10.5066/P9BW6CG6
St. Petersburg, FL
U.S. Geological Survey
https://doi.org/10.5066/P9BW6CG6
The National Assessment of Coastal Change Hazards project exists to understand and predict storm impacts to our nation's coastlines. This geospatial dataset defines the alongshore extent of overwash sediments deposited along the Florida coast and attributed to coastal processes during [Atlantic Basin] Hurricane Irma, which made landfall in the U.S. on September 9, 2017.
To provide alongshore extents of overwash deposits caused by Hurricane Irma.
20170909
20170911
ground condition
None planned
-82.339043
-81.047503
30.485406
25.946405
USGS Metadata Identifier
USGS:2edc4196-9ff7-4570-8777-8d4433937d6c
None
U.S. Geological Survey
USGS
St. Petersburg Coastal and Marine Science Center
Coastal and Marine Geology Program
Coastal and Marine Hazards and Resources Program
CMGP
CMHRP
SPCMSC
ISO 19115 Topic Category
geoscientificInformation
oceans
environment
USGS Thesaurus
hazards
marine geology
ocean sciences
coastal processes
sand deposits
sedimentation
Geographic Names Information System
Florida
None
Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. The U.S. Geological Survey requests to be acknowledged as originators of the data in future products or derivative research.
U.S. Geological Survey
Kara S. Doran
mailing and physical
600 4th Street South
Saint Petersburg
FL
33701
UNITED STATES
727-502-8117
727-502-8001
kdoran@usgs.gov
Microsoft Windows 10 Version 1909 (Build 18363.1500); Esri ArcGIS 10.7.1; Global Mapper 21.1
Data were QA/QC'd by an independent researcher using USGS oblique aerial photography.
This dataset is considered complete for the information presented, as described in the abstract section. Users are advised to read the rest of the metadata record carefully for additional details.
No formal horizontal positional accuracy tests were conducted.
No formal positional vertical accuracy tests were conducted
Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Geodetic Survey (NGS), Remote Sensing Division
201709
Hurricane Irma: Emergency Response Imagery of the Surrounding Regions
Silver Spring, MD
NOAA's Ocean Service, National Geodetic Survey (NGS)
https://storms.ngs.noaa.gov/storms/irma/index.html#6/28.139/-81.547
online digital data
201709
201709
ground condition
NOAA post-storm
Post-storm imagery used to determine overwash extent.
Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Geodetic Survey (NGS), Remote Sensing Division
201610
Hurricane Matthew: Rapid Response Imagery of the Surrounding Regions
Silver Spring, MD
NOAA's Ocean Service, National Geodetic Survey (NGS)
https://geodesy.noaa.gov/storm_archive/storms/matthew/index.html
online digital data
201610
201610
ground condition
NOAA pre-storm
Pre-storm imagery used to determine whether overwash occurred.
U.S. Geological Survey
Unpublished material
Hurricane Irma oblique aerial photography
aerial photos
20170909
20170911
ground condition
USGS obliques
USGS low-angle oblique photographs of the coast taken after the storm (Hurricane Irma) were used to verify that areas identified as overwash were indeed overwash and not dune erosion and scarping. In many instances, dune erosion and overwash leave sand deposits that appear similar in high-angle imagery.
Overwash extents were delineated, by hand using, ArcMap (10.5.1) and comparisons of pre-storm and post-storm imagery. In order to determine whether overwash had occurred, USGS staff searched for new sand deposits over roads, marshes and vegetation.
20181129
Overwash extents were QA/QC'd by an independent, second researcher using low-angle oblique photography to determine if any features were erroneously identified as overwash but were actually dune erosion.
20181129
The final .shp file was copied and converted to a .kmz file (Global Mapper 20.1) for use with non-proprietary software.
20190710
Version 2.0: In ArcMap 10.7.1, updated all instances of 'road' and 'marsh' to 'ROAD' and 'MARSH' within the 'TYPE' attribute field. In Global Mapper 22.0, converted the updated .shp file into a .kmz file. Refer to the version_history.txt file on the data release page for more versioning information.
20201228
Kirsten J. Bendik
U.S. Geological Survey
GIS Specialist II
mailing and physical
600 4th Street South
Saint Petersburg
FL
33701
UNITED STATES
727-502-8034
kbendik@contractor.usgs.gov
Vector
String
73
Universal Transverse Mercator
17
0.9996
-81.0
0.0
500000.0
0.0
coordinate pair
0.6096
0.6096
meters
North American Datum of 1983
GRS_1980
6378137.0
298.257222101
Irma_overwash_extent.shp
Overwash extents for Hurricane Irma.
USGS
FID
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
Feature geometry.
Esri
Coordinates defining the features.
OBJECTID
Overwash segment identification number.
Esri
1
74
TYPE
The type of substrate in which the overwash extent deposited onto. If the field is blank, the overwash extent did not cover any of the substrates defined below.
USGS
MARSH, ROAD
The substrate onto which overwash sediments were deposited.
USGS
SHAPE_Leng
Length of line segment, in meters.
Esri
15.753972
6417.129647
meters
U.S. Geological Survey
Kara S. Doran
mailing and physical
600 4th Street South
Saint Petersburg
FL
33701
727-502-8117
727-502-8001
kdoran@usgs.gov
This digital publication was prepared by an agency of the United States Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, nor shall the act of distribution imply any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.
SHP (ArcGIS shapefile), KMZ
The data download file is compressed and must be unzipped using software such as WinZip, 7Zip, etc. before use.
https://coastal.er.usgs.gov/data-release/doi-P9BW6CG6/data/Irma_Overwash_Extent.zip
None
none
20210916
U.S. Geological Survey
Kara S. Doran
mailing and physical
600 4th Street South
Saint Petersburg
FL
33701
UNITED STATES
727-502-8117
727-502-8001
kdoran@usgs.gov
Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998
local time