National Oceanic and Atmospheric Administration
U.S. Geological Survey
2008
10-m Interpolated Bathymetric Grid of the Northern Part of National Oceanic and Atmospheric Administration (NOAA) Survey H11044 off Milford, Connecticut (H11044N_10UTM, UTM Zone 18, WGS84)
1.0
raster digital data
Open-File Report
2008-1146
Woods Hole Coastal and Marine Science Center, Woods Hole, MA
U.S. Geological Survey, Coastal and Marine Geology Program
https://doi.org/10.3133/ofr20081146
http://pubs.usgs.gov/of/2008/1146/html/catalog.html
http://pubs.usgs.gov/of/2008/1146/data/bathy/grids/utm/esrigrid/h11044n_10utm.zip
L.J. Poppe
S.D. Ackerman
K.Y. McMullen
P.T. Schattgen
J.D. Schaer
E.F. Doran
2008
Interpolation of Reconnaissance Multibeam and Single-Beam Bathymetry Offshore of Milford, Connecticut
1.0
Open-File Report
2008-1146
Reston, VA
U.S. Geological Survey
http://pubs.usgs.gov/of/2008/1146/
During 2001 the NOAA Ship RUDE completed charting survey H11044 that covered a roughly 293 km2 area of the sea floor in north-central Long Island Sound, off Milford Connecticut. Although 100 percent coverage was achieved with sidescan sonar for charting purposes, only reconnaissance (spaced line) bathymetry was acquired with shallow-water multibeam and single-beam systems. Therefore, further processing was conducted at the USGS's Woods Hole Science Center to provide bathymetric datasets with more continuous coverage. This project produced grids and GeoTIFF imagery of the combined and interpolated shallow-water multibeam and single-beam bathymetry generated from the northern part of this data set.
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. 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 interpolated and gridded shallow-water multibeam and single-beam bathymetric data within specific areas of special interest.
To release a 10-m interpolated grid of the shallow-water multibeam and single-beam bathymetry generated from the northern part of NOAA survey H11044 off Milford, Connecticut in UTM Zone 18, WGS84.
20010507
20011113
ground condition
None planned
-73.128918
-72.933637
41.248931
41.127808
USGS Metadata Identifier
USGS:33c1a33d-2d49-4871-b43c-e99f3355c026
None
U.S. Geological Survey
USGS
Woods Hole Science Center
shallow-water multibeam bathymetry
bathymetry
Coastal and Marine Geology Program
CMGP
WHSC
Reson 8125
NOAA survey H11044
H11044
National Oceanic and Atmospheric Administration
NOAA
grid
Open-File Report 2008-1146
ArcRaster grid
OFR 2008-1146
single-beam bathymetry
interpolated bathymetry
Odom Echotrac DF-3200
ISO 19115 Topic Category
elevation
oceans
Data Categories for Marine Planning
distributions
bathymetry and elevation
Marine Realms Information Bank (MRIB) Keywords
single-beam echo sounder
multibeam echo sounder
marine geophysics
USGS Thesaurus
single-beam echo sounder
multibeam sonar
bathymetry measurement
bathymetry
marine geophysics
None
Connecticut
Long Island Sound
U.S. East Coast
United States
North America
Atlantic Ocean
Milford
Charles Island
Stratford Point
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) and U.S. Geological Survey (USGS) as the originators of this information.
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
http://pubs.usgs.gov/of/2008/1146/data/bathy/grids/utm/esrigrid/h11044n_10utm.jpg
Thumbnail image showing the 10-m gridded interpolated bathymetry collected during NOAA survey H11044 in UTM Zone 18, WGS84 projection
JPEG
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.2.1350
L.J. Poppe
S.D. Ackerman
E.F. Doran
A.J. Beaver
J.M. Crocker
P.T. Schattgen
2006
Interpolation of Reconnaissance Multibeam Bathymetry from North-Central Long Island Sound
1.0
Open-File Report
2005-1145
Reston, VA
U.S. Geological Survey
http://pubs.usgs.gov/of/2005/1145/
Information unavailable from original metadata.
All collected data from the northern part of NOAA survey H11044 were processed and used to produce this dataset.
Navigation was by differential GPS
The vertical resolution of the shallow-water multibeam data is approximately 0.5% of the water depth.
The source information was incomplete and had to be modified to meet the standard. Assumed to be NOAA.
unknown
The source information was incomplete and had to be modified to meet the standard.
DVD-ROM
20010507
20011113
ground condition
Information unavailable from original metadata.
Original processed shallow-water multibeam and single-beam bathymetric data.
The multibeam data were acquired in XTF (extended Triton data format) and recorded digitally through an ISIS data acquisition system. A Reson SeaBat 9003 echosounder was used to acquire the shallow-water multibeam bathymetric data and an Odom Echotrac DF-3200 dual-frequency echosounder was used to acquire the single-beam bathymetry from the NOAA ship Rude. An Odom Echotrac DF-3200 dual-frequency echosounder hull-mounted on a 23' launch deployed from the NOAA ship Rude was used to acquire sounding data in the shallower areas. These data were processed using CARIS HIPS (Hydrographic Image Processing System) software for quality control, and to incorporate sound velocity and tidal corrections. Sound velocity corrections were derived using frequent SEACAT CTD (conductivity-temperature-depth) profiles. Typically, a CTD cast was conducted every four to six hours of multibeam acquisition. Tidal zone corrections were calculated from data acquired at tidal gauges at Bridgeport and NewHaven, Connecticut, and at Kings Point, New York. The vertical resolution of the shallow-water multibeam data is approximately 0.5% of the water depth. The data were gridded to 1.5-m resolution and exported in text (.txt) format. Vertical datum is mean lower low water; X and Y units are decimal degrees.
Unknown
h11044_1_5mddeg_xyz.txt
National Oceanic and Atmospheric Administration
Jasper Schaer
Field Operations Officer
mailing address
439 West York Street
Norfolk
VA
23510
USA
757-441-6726
jasper.schaer@noaa.gov
The PROJ v4.5 cartographic projections library was used to project the data to UTM zone 18 [proj +proj=utm +zone=18 +ellps=WGS84 -r -s -f %0.2f h11044_1_5mddeg_xyz.txt > UTM_H11044_1_5m.xyz].
h11044_1_5mddeg_xyz.txt
2008
utm_h11044_1_5m.xyz
Seth Ackerman
Woods Hole Science Center
Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543
508-548-8700 x2315
508-457-2310
sackerman@usgs.gov
A series of GMT v4.0 (the Generic Mapping Tools) are run during this process including Minmax to determine the data bounds and to help identify anomalous values [minmax UTM_H11044_1_5m.xyz]. An AWK script was run to filter the dataset and prepare it to be processed thru the GMT block median routine [awk '{if($3>0 && $3<22 $1>4555000) printf "%6.2f\t%7.2f\t%3.2f\n",$2,$1,$3*-1}' UTM_H11044_1_5m.xyz > sda_44.end].
Based on visual inspection of the removed data points (both their location and their elevation relation to the surrounding data points) the values above 22 were indeed anomalous.
utm_h11044_1_5m.xyz
2008
sda_44.end
Seth Ackerman
Woods Hole Science Center
Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543
508-548-8700 x2315
508-457-2310
sackerman@usgs.gov
GMT v4.0 programs were used to create a 10-m interpolated GMT grid of the bathymetry. Interpolation was achieved during GMT processing by running the data through a block median filter [blockmedian sda_44.end -R656854.36/674854.36/4555000.52/4570000.52/ -I10/10 -V -bod > sda_44.blockmed], a surface generating algorithm [surface sda_44.blockmed -R656854.36/674854.36/4555000.52/4570000.52/ -Gsda_big44.grd -C0.1 -I10/10 -T1.0 -V -bid], and the grid cut program [grdcut sda_big44.grd -R656854.36/673134.36/4555000.52/4568110.52/ -Gsda_cut44.grd]. Processing parameters were set to default unless otherwise noted in the scripts.
sda_44.end
2008
sda_cut44.grd
Seth Ackerman
Woods Hole Science Center
Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543
508-548-8700 x2315
508-457-2310
sackerman@usgs.gov
The GDAL v1.3.2 (Geospatial Data Abstraction Library) commandline utility gdal_translate was used to convert the GMT grid into a 32bit GeoTIFF with proper bounds and projection information [gdal_translate -sds -a_ullr 656849.36 4554995.52 673139.36 4568115.52 -a_srs EPSG:32618 sda_cut44.grd sda_44_new2.tif].
sda_cut44.grd
2008
sda_44_new2.tif
Seth Ackerman
Woods Hole Science Center
Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543
508-548-8700 x2315
508-457-2310
sackerman@usgs.gov
The GeoTIFF created in GMT/GDAL was then clipped by a shapefile of the survey extent using ESRI ArcGIS ArcToolbox v9.2 (Spatial Analyst, Extraction, Extract by Mask).
sda_44_new2.tif
2008
h11044n_10utm
Seth Ackerman
Woods Hole Science Center
Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543
508-548-8700 x2315
508-457-2310
sackerman@usgs.gov
Edits to the metadata were made to fix any errors that MP v 2.9.32 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.). The source information was incomplete and had to be modified to meet the standard. The distribution format name was modified in an attempt to be more consistent with other metadata files of the same data format. 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.
20160307
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Keywords section of metadata optimized for discovery in USGS Coastal and Marine Geology Data Catalog.
20170214
U.S. Geological Survey
Alan O. Allwardt
Contractor -- Information Specialist
Mailing and Physical
2885 Mission Street
Santa Cruz
CA
95060
831-460-7551
831-427-4748
aallwardt@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
Raster
Grid Cell
1309
1609
1
Universal Transverse Mercator
18
0.999600
-75.000000
0.000000
500000.000000
0.000000
row and column
10.000000
10.000000
meters
D_WGS_1984
WGS_1984
6378137.000000
298.257224
Mean lower low water
0.001
meters
Explicit depth coordinate included with horizontal coordinates
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
Neither the U.S. Government, the Department of the Interior, the USGS, NOAA, Connecticut Department of Environmental Protection, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights.
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
AIG
ArcGIS 9.2
ESRI ArcRaster Grid
One file (h11044n_10utm.zip) containing the ArcGIS grid file components, browse graphic and metadata.
zip archive
3
http://pubs.usgs.gov/of/2008/1146/data/bathy/grids/utm/esrigrid/h11044n_10utm.zip
http://pubs.usgs.gov/of/2008/1146/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 the ESRI grid data format.
2008
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