National Oceanic and Atmospheric Administration
2007
2-m ASCII Bathymetric Grid from National Oceanic and Atmospheric Administration (NOAA) Survey H11361 of the Sea Floor in Eastern Long Island Sound (H11361_2MUTM18_XYZ.TXT, UTM Zone18)
1.0
Open-File Report
2007-1191
Woods Hole Coastal and Marine Science Center, Woods Hole, MA
U.S. Geological Survey, Coastal and Marine Geology Program
https://doi.org/10.3133/ofr20071191
https://pubs.usgs.gov/of/2007/1191/data/h11361/bathy/grids/utm/asciigrid/h11361_2mutm18_xyz.zip
https://pubs.usgs.gov/of/2007/1191/html/catalog.html
L.J. Poppe
J.F. Denny
S.J. Williams
M.S. Moser
N.A. Forfinski
H.F. Stewart
E.F. Doran
2007
The Geology of Six Mile Reef, Eastern Long Island Sound
1.0
Open-File Report
2007-1191
Reston, VA
U.S. Geological Survey
https://pubs.usgs.gov/of/2007/1191/
The U.S. Geological Survey, in cooperation with the National Oceanic and Atmospheric Administration and the Connecticut Department of Environmental Protection, has produced detailed geologic maps of the sea floor in Long Island Sound, a major East Coast estuary surrounded by the most densely populated region of the United States. These studies have built upon cooperative research with the State of Connecticut that was initiated in 1982. The current phase of this research program is directed toward studies of sea-floor sediment distribution, processes that control sediment distribution, nearshore environmental concerns, and the relation of benthic community structures to the sea-floor geology.
Anthropogenic wastes, toxic chemicals, and changes in land-use patterns resulting from residential, commercial, and recreational development have stressed the environment of the Sound, causing degradation and potential loss of benthic habitats (Koppelman and others, 1976; Long Island Sound Study, 1994). Detailed maps of the sea floor are needed to help evaluate the extent of adverse impacts and to help manage resources wisely in the future. Therefore, in a continuing effort to better understand Long Island Sound, we have constructed and interpreted multibeam bathymetric data within specific areas of special interest. This bathymetric data layer presented herein covers a roughly 92 km square area of the sea floor in the area just west of Six Mile Reef, eastern Long Island Sound. The original multibeam bathymetric data were collected during 2004 as part of charting applications aboard the NOAA Survey Vessel Thomas Jefferson. A Simrad EM1002 multibeam system mounted on the hull of this vessel was used to acquire data along survey lines from the deeper water (>20 m) parts of the study area. Two 29-foot launches with hull-mounted Reson systems were deployed from the ship and were used to acquire data along survey lines from the shallower areas.
Detailed bathymetric data and their interpretations serve many purposes, including: (1) defining the geological variability of the sea floor, which is one of the primary controls of benthic habitat diversity; (2) improving our understanding of the processes that control the distribution and transport of bottom sediments and the distribution of benthic habitats and associated infaunal community structures; and (3) providing a detailed framework for future research, monitoring, and management activities. The bathymetric data models also serve as base maps for subsequent sedimentological, geochemical, and biological observations, because precise information on environmental setting is important for selection of sampling sites and for accurate interpretation of point measurements.
To release an ASCII XYZ (Easting, Northing, Depth) file containing the 2-m bathymetry generated from NOAA survey H11361 in Long Island Sound.
2004
ground condition
None planned
-72.542828
-72.396231
41.221784
41.144777
USGS Metadata Identifier
USGS:92ac3eb4-aac1-4b61-b1e9-a643e303d4af
None
U.S. Geological Survey
USGS
Woods Hole Science Center
multibeam bathymetry
bathymetry
Coastal and Marine Geology Program
CMGP
WHSC
Reson 8125
NOAA survey H11361
H11361
National Oceanic and Atmospheric Administration
NOAA
Reson 8101
Open-File Report 2007-1191
ASCII grid
ISO 19115 Topic Category
oceans
elevation
USGS Thesaurus
bathymetry
sea-floor characteristics
multibeam sonar
marine geophysics
geospatial datasets
None
Connecticut
New York
U.S. East Coast
United States
North America
Atlantic Ocean
Six Mile Reef
Long Island Sound
None
Data are not to be used for navigation purposes.
Public domain data are freely redistributable with proper metadata and source attribution. Please recognize the National Oceanic and Atmospheric Administration (NOAA) as the originator of this information.
U.S. Geological Survey
Lawrence Poppe
Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543-1598
USA
(508) 548-8700 x2314
(508) 457-2310
lpoppe@usgs.gov
https://pubs.usgs.gov/of/2007/1191/data/h11361/bathy/grids/utm/asciigrid/h11361_2mutm18_xyz.gif
Thumbnail image showing the extent of soundings collected during NOAA survey H11361
GIF
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.780
L.J. Poppe
S.J. Williams
M.S. Moser
N.A. Forfinski
H.F. Stewart
E.F. Doran
2007
Quaternary geology and sedimentary processes in the vicinity of Six Mile Reef, eastern Long Island Sound
1.0
Journal of Coastal Research
v. 23, no. 6
Information unavailable from original metadata.
All collected data were processed and used to produce this dataset.
Navigation was by differential GPS. Horizontal resolution of the data varies with water depth, but averages 2 m.
Vertical resolution is about 0.5% of the water depth.
NOAA (assumed)
unknown
Information unavailable from original metadata.
DVD-ROM
2004
ground condition
Information unavailable from original metadata.
The original multibeam bathymetric data acquired with Simrad EM1002, Reson 8101, and 8125 echosounder systems during NOAA cruise H11361 aboard the NOAA ship Thomas Jefferson. A Simrad EM1002 multibeam system mounted on the hull of this vessel was used to acquire data along survey lines from the deeper water (>20 m) parts of the study area. Two 29-foot launches with hull-mounted Reson systems were deployed from the ship and were used to acquire data along survey lines from the shallower areas.
The multibeam data were acquired in XTF (extended Triton data format), recorded digitally through an ISIS data acquisition system, and processed using CARIS HIPS (Hydrographic Image Processing System) software for quality control, to incorporate sound velocity and tidal corrections, and to produce base surfaces averaging 2-m resolution over the study area. The data were exported in text (.txt) format in UTM Zone 18.
raw bathymetric data
Unknown
h11361_2mutm18.xyz.txt
Marc Moser
National Oceanic and Atmospheric Administration
Field Operations Officer
mailing address
439 West York Street
Norfolk
VA
23510
USA
(757) 441-6746
marc.s.moser@noaa.gov
Edits to the metadata were made to fix any errors that MP v 2.9.36 flagged. This is necessary to enable the metadata to be successfully harvested for various data catalogs. In some cases, this meant adding text "Information unavailable" or "Information unavailable from original metadata" for those required fields that were left blank. Other minor edits were probably performed (title, publisher, publication place, etc.). Attempted to modify http to https where appropriate. Removed invalid link to data in Identification and Distribution sections. The source information was incomplete and had to be modified to meet the standard. In the case of the depth resolution, the value of 9999 was entered to indicate that the original metadata did not contain the required information. The geodetic model parameters for semi-major axis and denominator of flattening ratio were added to match the datum name. The metadata date (but not the metadata creator) was edited to reflect the date of these changes. The metadata available from a harvester may supersede metadata bundled within a download file. Compare the metadata dates to determine which metadata file is most recent.
20170210
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
USGS Thesaurus keywords added to the keyword section.
20180720
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
Crossref DOI link was added as the first link in the metadata.
20191118
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
Added keywords section with USGS persistent identifier as theme keyword.
20200908
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
Point
Universal Transverse Mercator
18
.999600
-75.000000
0.000000
500000.000000
0.000000
coordinate pair
2.000359
2.000000
meters
North American Datum of 1983
Geodetic Reference System 80
6378137.000000
298.257222
Mean lower low water
9999
meters
Explicit depth coordinate included with horizontal coordinates
Three space separated values per record. Value one is the eastings coordinate in meters of the ship coordinate; value 2 is the northings coordinate in meters the ship's coordinate; value three is the acquired depth value. The depth value is recorded in meters as a positive value.
U.S. Geological Survey
U.S. Geological Survey
Larry Poppe
Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543-1598
USA
(508) 548-8700 x2314
(508) 457-2310
lpoppe@usgs.gov
Downloadable Data
Although this data set has been used by the USGS, no warranty, expressed or implied, is made by the U.S. Geological Survey (USGS) as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials.
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
ASCII
The ASCII data (h11361_2mutm18_xyz.txt), browse graphic, and metadata.
zip archive
https://pubs.usgs.gov/of/2007/1191/data/h11361/bathy/grids/utm/asciigrid/h11361_2mutm18_xyz.zip
https://pubs.usgs.gov/of/2007/1191/html/catalog.html
Data are downloadable via the World Wide Web (WWW).
DVD-ROM
4.75
Gbytes
UDF
None
The user must have a program capable of reading and processing ASCII formatted XYZ data files.
2007
20211116
Larry Poppe
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543-1598
USA
(508) 548-8700 x2314
(508) 457-2310
whsc_data_contact@usgs.gov
The metadata contact email address is a generic address in the event the metadata contact is no longer with the USGS or the email is otherwise invalid.
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
local time
None
None