U.S. Geological Survey
20161027
Distribution of Benthic Habitats at Crocker Reef, Florida, 2014
first
Vector digital data
U.S. Geological Survey Data Release
doi:10.5066/F77942T0
St. Petersburg, FL
U.S. Geological Survey
https://doi.org/10.5066/F77942T0
The distribution of benthic habitats for a 1-kilometer (km) x 1-km area around Crocker Reef in the Florida Keys, USA, is based upon underwater digital images of the seafloor collected on June 24 and 25, 2014 (Zawada and others, 2016). The imagery was collected using the U.S. Geological Survey (USGS) shallow Along-Track Reef-Imaging System (sATRIS), a boat-based, pole-mounted sensor package for mapping shallow-water benthic environments. The polygons contained in the shapefile included in this data release, Habitat.shp, represent the four general habitat types found at Crocker Reef: hardbottom, rubble, sand, and seagrass.
Images were collected to support the Reefscape Geologic-framework task of the USGS Coral Reef Ecosystem Studies project (https://coastal.er.usgs.gov/crest/). Benthic composition, topographic relief, areal extent, and temporal stability are critical factors that contribute to the value of a given marine habitat. To provide context for the data collected in the other tasks, the focus of this task was to characterize physical aspects of the project study sites, including habitat classification, sediment distribution, and vertical temperature profiles. The images used to help create the habitat map were acquired during USGS field activity number 2014-313-FA, additional survey and data details are available at https://cmgds.marine.usgs.gov/fan_info.php?fan=2014-313-FA.
sATRIS images were saved in the Joint Photographic Experts Group (JPEG) format using a quality factor of 1000 (highest quality/minimal compression). GPS position, collection date and time, and camera distance-above-seafloor are stored in the EXchangable Image File format (EXIF) header of each image. Note: The cited cross-reference covers a different geographic region (Dry Tortugas National Park) than this data release's survey area, however, the methodology presented therein was also used for the 2014 Crocker Reef study. The data were collected under Florida Keys National Marine Sanctuary permit FKNMS-2013-097.
20140624
20140625
ground condition
None planned
-80.537374425
-80.520401183
24.916826076
24.902166409
USGS Metadata Identifier
USGS:17c42e6e-5d7f-4166-8fc5-8cb46647901a
ISO 19115 Topic Category
oceans
geoscientificInformation
imageryBaseMapsEarthCover
USGS Thesaurus
aquatic biology
marine geology
remote sensing
None
sATRIS
Shallow Along-Track Reef Imaging System
remote sensing
seafloor imagery
benthic surveys
habitat mapping
digital imagery
submerged
Global Change Master Science Directory
OCEAN > MARINE SEDIMENTS > SEDIMENT COMPOSITION
OCEAN > COASTAL PROCESSES > CORAL REEFS
DOI/USGS/CMG > COASTAL AND MARINE GEOLOGY, U.S. GEOLOGICAL SURVEY, U.S. DEPARTMENT OF INTERIOR
GCMD Instrument
EARTH REMOTE SENSING INSTRUMENTS > PASSIVE REMOTE SENSING > PHOTON/OPTICAL DETECTORS > CAMERAS > CAMERAS
Geographic Names Information System
Crocker Reef
Florida Keys
Florida
Oregon Geospatial Enterprise Office (GEO Stratum Keyword
epipelagic
None
2014
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 originator of these data in future products or derivative research.
David Zawada
U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, St. Petersburg, FL
Research Oceanographer
mailing and physical address
600 4th Street South
St. Petersburg
FL
33701
USA
727 502-8132
727 502-8181
dzawada@usgs.gov
M-F, 9:00-5:00 ET
Acknowledgment of the U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, as a data source would be appreciated in products developed from these data, and such acknowledgment as is standard for citation and legal practices for data source is expected. Sharing of new data layers developed directly from these data would also be appreciated by the U.S. Geological Survey staff. Users should be aware that comparisons with other datasets for the same area from other periods may be inaccurate because of inconsistencies resulting from changes in photointerpretation, mapping conventions, and digital processes over time. These data are not legal documents and are not to be used as such.
Unclassified
Unclassified
None
Microsoft Windows 7 Enterprise Service Pack 1; Esri ArcCatalog 10.4.1.5686
Zawada, D.G.
2003
Image processing of underwater multispectral imagery
IEEE Journal of Oceanic Engineering
v. 28(4), p. 583-594
https://doi.org/10.1109/JOE.2003.819157
Lidz, B.H. and D.G. Zawada
2013
Possible Return of Acropora cervicornis at Pulaski Shoal, Dry Tortugas National Park, Florida
Journal of Coastal Research
v. 29, p. 256-271
https://doi.org/10.2112/JCOASTRES-D-12-00078.1
Zawada, D.G., Thornton, L., Thompson, P., Resnick, J.
2016
ATRIS Seafloor Images--Crocker Reef, Florida, 2014
U.S. Geological Survey Data Release
doi:10.5066/F7SF2T9Z
https://doi.org/10.5066/F7SF2T9Z
Classification data derived from sATRIS images (Zawada and others, 2016) were plotted on top of a DigitalGlobe WorldView-2 satellite image in ArcMap 10.3.1. Polygons were manually drawn to denote areas with a given habitat type.
Data cover area specified for this project without known issues.
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 aditional details.
Habitats are referenced to a satellite image with 2-meter accuracy. With the introduction of human drawing error, USGS staff cite the horizontal accuracy of the habitat boundries to be within 5 meters.
A formal accuracy assessment of the vertical positional information in the dataset has either not been conducted, or is not applicable.
High-resolution, geo-located images of the seafloor were captured between June 24 and 25, to characterize the seafloor and ground truth benthic habitat mapping efforts. The sATRIS was deployed from the USGS research vessel (R/V) Sallenger, a Parker 2530 boat, running at a nominal speed of 2 knots and following pre-determined survey tracklines. GPS data were simultaneously collected at a fixed land-based location (24° 57' 12.07059", -80° 35' 12.43033") and on the R/V Sallenger during image acquisition using Ashtech Z-Xtreme GPS receivers. In this study, sATRIS images were collected at a rate of 5 hertz (Hz) and the GPS data at 1 Hz. The GPS data were differentially corrected using GrafNav Version 8.40.5121, converted to the North American Datum of 1983 (2011) and the North American Vertical Datum of 1988 (using the GEOID12A model) using in-house software, and have sub-decimeter accuracy. Please note that these data are not suitable for navigational use, nor for determining absolute elevation measurements.
20150123
BJ Reynolds
U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, St. Petersburg, FL
Engineering Technician
mailing and physical address
600 4th Street South
St. Petersburg
FL
33701
USA
727 502-8067
breynolds@usgs.gov
M-F, 8:00-4:00 ET
sATRIS images were manually classified based on the predominant benthic cover in a given image, and labeled as hardbottom, rubble, sand, or seagrass. Because of extensive overlap between sATRIS images, only every fourth image was classified. To fill gaps between sATRIS images and create a contiguous set of polygons, a DigitalGlobe WorldView-2 satellite image (10DEC04160950-M1BS-052442009010_04_P001.ntf, acquired on December 4, 2010) was used as a synoptic reference. This satellite image has a spatial resolution of 2 meters. A colored dot was plotted at the location of each classified image using ArcMap 10.3.1. Each classification category was assigned a unique color. Polygons encompassing like-colored dots and corresponding areas in the satellite image were drawn by hand in ArcMap. All polygons for each classification category were merged together and saved in a single shapefile. For additional processing details, see Lidz and Zawada (2013).
20150402
Dave Zawada
U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, St. Petersburg, FL
Research Oceanographer
mailing and physical address
600 4th Street South
St. Petersburg
FL
33701
USA
727 502-8132
dzawada@usgs.gov
M-F, 9:00-5:00 ET
Raw sATRIS images exhibit barrel distortion due to the wide-angle camera lens. The images in this data release were corrected using an in-house image de-warping algorithm (Zawada, 2003). These data are stored on hard drives and archived at the U.S. Geological Survey office in St. Petersburg, Florida.
20150507
Dave Zawada
U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, St. Petersburg, FL
Research Oceanographer
mailing and physical address
600 4th Street South
St. Petersburg
FL
33701
USA
727 502-8132
dzawada@usgs.gov
M-F, 9-5 ET
Created metadata in Notepad++
20160907
Dave Zawada
U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, St. Petersburg, FL
Research Oceanographer
mailing and physical address
600 4th Street South
St. Petersburg
FL
33701
USA
727 502-8132
dzawada@usgs.gov
M-F, 9:00-5:00 ET
Added keywords section with USGS persistent identifier as theme keyword.
20201013
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Vector
G-polygon
4
Universal Transverse Mercator
17
0.999600
-81.000000
0
500000.0
0.0
coordinate pair
0.6096
0.6096
meters
North American Datum of 1983 (2011)
Geodetic Reference System 80
6378137.0
298.257222101
Habitat.shp
This file contains total area measurements for each habitat type that were identified using sATRIS images collected in June 2014 from Crocker Reef, Florida.
USGS
FID
Internal feature number
Esri
Sequential unique whole numbers that are automatically generated.
Shape
Feature Geometry
Esri
Coordinates defining the features.
Id
Feature number
USGS
0
3
Habitat_Nm
The predominant habitat type used in the map.
USGS
Hardbottom
This category commonly harbors varieties of octocorals, sponges, algae, the fleshy colonial zoanthid Palythoa caribaeorum, the fire corals Millepora alcicornis and M. complanata, other encrusting reef-associated organisms, coral skeletons, rubble and sands, and a few isolated live, stony, head-coral species.
USGS
Rubble
This category consisted primarily of clearly identifiable A. cervicornis sticks intermixed with carbonate fragments of other shapes and sizes of indeterminate origins.
USGS
Sand
This category did not differentiate between coarse- and fine-grained size fractions, although clarity of the ATRIS imagery would have allowed for such distinction.
USGS
Seagrass
This category included the most prevalent type of seagrass-the turtle grass Thalassia testudinum-occasionally mixed with the manatee grass Syringodium filiforme.
USGS
Area
Total area of each feature type, measured in square meters.
USGS
133709
695120
The geographic information system (GIS) data are provided as a .zip file comprised of an Esri shapefile and accompanying metadata. The entity and attribute information provided here describes the tabular data associated with the dataset. Please review the detailed descriptions that are provided (the individual attribute descriptions) for information on the values that appear as fields/table entries of the dataset.
The entity and attribute information was generated by the individual and (or) agency identified as the originator of the dataset. Please review the rest of the metadata record for additional details and information.
U.S. Geological Survey
Dave Zawada
Research Oceanographer
mailing and physical address
600 4th Street South
St. Petersburg
FL
33701
USA
727 502-8132
M-F, 9:00-5:00 ET
Habitat.shp
Although these data have been processed successfully on a computer system at the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The USGS shall not be held liable for improper or incorrect use of the data described or contained herein. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
SHP
1
Vector Digital Dataset (Polygon)
https://coastal.er.usgs.gov/data-release/doi-F77942T0/data/CRKR2014_HABITAT.zip
None
Contact U.S. Geological Survey.
Vary
Contact U.S. Geological Survey for details.
20201013
Dave Zawada
U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, St. Petersburg, FL
Research Oceanographer
mailing and physical address
600 4th Street South
St. Petersburg
FL
33701
USA
727 502-8132
dzawada@usgs.gov
M-F, 9:00-5:00 ET
Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998
local time