NLONDON_MBLIDAR_GEO.TIF: Color Shaded-Relief GeoTIFF Image Showing
the Combined 4-m Multibeam and LIDAR Bathymetry Generated from National
Oceanic and Atmospheric Administration (NOAA) Surveys H11441 and H11224
Offshore of New London, CT (Geographic, WGS84)
Metadata also available as [Questions & Answers] - [Parseable text]
Metadata:
- Identification_Information:
-
- Citation:
-
- Citation_Information:
-
- Originator: National Oceanic and Atmospheric
Administration
- Originator: U.S. Geological Survey
- Publication_Date: 2010
- Title:
- NLONDON_MBLIDAR_GEO.TIF: Color Shaded-Relief GeoTIFF
Image Showing the Combined 4-m Multibeam and LIDAR Bathymetry Generated
from National Oceanic and Atmospheric Administration (NOAA) Surveys
H11441 and H11224 Offshore of New London, CT (Geographic, WGS84)
- Edition: 1.0
- Geospatial_Data_Presentation_Form:
remote-sensing image
- Series_Information:
-
- Series_Name: Open-File Report
- Issue_Identification: 2009-1231
- Publication_Information:
-
- Publication_Place:
- USGS Woods Hole Coastal and Marine Science
Center, Woods Hole, MA
- Publisher: U.S. Geological Survey,
Coastal and Marine Geology Program
- Online_Linkage:
- <https://pubs.usgs.gov/of/2009/1231/data/bathy/geotifs/nlondon/nlondon_mblidar_geo.zip>
- Online_Linkage: <https://pubs.usgs.gov/of/2009/1231/data/bathy/geotifs/nlondon/>
- Online_Linkage: <https://pubs.usgs.gov/of/2009/1231/html/catalog.html>
- Larger_Work_Citation:
-
- Citation_Information:
-
- Originator: L.J. Poppe
- Originator: W.W. Danforth
- Originator: K.Y. McMullen
- Originator: C.E. Parker
- Originator: P.G. Lewit
- Originator: E.F. Doran
- Publication_Date: 2010
- Title:
- Integrated Multibeam and LIDAR Bathymetry
Data Offshore of New London and Niantic, Connecticut
- Edition: 1.0
- Series_Information:
-
- Series_Name: Open-File Report
- Issue_Identification: 2009-1231
- Publication_Information:
-
- Publication_Place:
- USGS Woods Hole Coastal and Marine
Science Center, Woods Hole, MA
- Publisher: U.S. Geological
Survey, Coastal and Marine Geology Program
- Other_Citation_Details: 1 CD-ROM
- Online_Linkage: <https://pubs.usgs.gov/of/2009/1231/>
- Description:
-
- Abstract:
- Nearshore areas within Long Island Sound are of great
interest to the Connecticut and New York research and management
communities because of their ecological, recreational, and commercial
importance. However, although advances in multibeam echosounder
technology permit the construction of detailed digital terrain models
of seafloor topography within deeper waters, limitations inherent with
collecting multibeam data make using this technology in shallower
waters (<10-m deep) more difficult and expensive. These limitations
have often resulted in gaps of no data between multibeam bathymetric
datasets and the adjacent shoreline. To address this problem,
complete-coverage multibeam bathymetry acquired offshore of New London
and Niantic Bay, Connecticut, has been integrated with hydrographic
LIDAR acquired along the nearshore. The result is a more continuous
seafloor perspective and a much smaller gap between the digital
bathymetric data and the shoreline. These datasets are provided as ESRI
grid and GeoTIFF formats in order to facilitate access, compatibility,
and utility.
- Purpose:
- To release a color shaded-relief GeoTIFF of the 4-m
combined multibeam and LIDAR bathymetry generated from NOAA surveys
H11441 and H11224 offshore of New London, Connecticut in geographic,
WGS84 coordinates.
- Time_Period_of_Content:
-
- Time_Period_Information:
-
- Range_of_Dates/Times:
-
- Beginning_Date: 20040120
- Ending_Date: 20050522
- Currentness_Reference:
- ground condition (See the source citation in the lineage
section for individual component's specific dates.)
- Status:
-
- Progress: Complete
- Maintenance_and_Update_Frequency: None planned
- Spatial_Domain:
-
- Bounding_Coordinates:
-
- West_Bounding_Coordinate: -72.112647
- East_Bounding_Coordinate: -71.983995
- North_Bounding_Coordinate: 41.376713
- South_Bounding_Coordinate: 41.237705
- Keywords:
-
- Theme:
-
- Theme_Keyword_Thesaurus: General
- Theme_Keyword: U.S. Geological Survey
- Theme_Keyword: USGS
- Theme_Keyword: USGS Woods Hole Coastal and
Marine Science Center
- Theme_Keyword: multibeam bathymetry
- Theme_Keyword: LIDAR
- Theme_Keyword: Coastal and Marine Geology
Program
- Theme_Keyword: CMGP
- Theme_Keyword: WHCMSC
- Theme_Keyword: NOAA survey H11441
- Theme_Keyword: NOAA survey H11224
- Theme_Keyword: National Oceanic and
Atmospheric Administration
- Theme_Keyword: NOAA
- Theme_Keyword: GeoTIFF
- Theme_Keyword: Open-File Report 2009-1231
- Theme_Keyword: OFR 2009-1231
- Theme_Keyword: RESON 8125
- Theme_Keyword: RESON 8101
- Theme_Keyword: hill-shaded
- Theme_Keyword: H11441
- Theme_Keyword: H11224
- Theme_Keyword: Connecticut Department of
Environmental Protection
- Theme_Keyword: CT DEP
- Theme_Keyword: bathymetry
- Theme:
-
- Theme_Keyword_Thesaurus: ISO 19115 Topic
Category
- Theme_Keyword: oceans and estuaries
- Theme_Keyword: oceans and coastal
- Theme_Keyword: elevation
- Theme_Keyword: oceans
- Theme_Keyword: imageryBaseMapsEarthCover
- Place:
-
- Place_Keyword_Thesaurus: General
- Place_Keyword: Connecticut
- Place_Keyword: New London
- Place_Keyword: U.S. East Coast
- Place_Keyword: United States
- Place_Keyword: North America
- Place_Keyword: Atlantic Ocean
- Place_Keyword: Fishers Island
- Place_Keyword: Groton
- Place_Keyword: Avery Point
- Place_Keyword: New York
- Place_Keyword: Pine Island
- Place_Keyword: Long Island Sound
- Place_Keyword: Fishers Island Sound
- Access_Constraints: None
- Use_Constraints:
- 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.
- Point_of_Contact:
-
- Contact_Information:
-
- Contact_Organization_Primary:
-
- Contact_Organization: U.S. Geological
Survey
- Contact_Person: Larry Poppe
- Contact_Position: Geologist
- Contact_Address:
-
- Address_Type: mailing and physical
address
- Address: 384 Woods Hole Road
- City: Woods Hole
- State_or_Province: MA
- Postal_Code: 02543-1598
- Country: USA
- Contact_Voice_Telephone: (508) 548-8700 x2314
- Contact_Facsimile_Telephone: (508) 457-2310
- Contact_Electronic_Mail_Address:
lpoppe@usgs.gov
- Browse_Graphic:
-
- Browse_Graphic_File_Name:
- <https://pubs.usgs.gov/of/2009/1231/data/bathy/geotifs/nlondon/nlondon_mblidar_geo.jpg>
- Browse_Graphic_File_Description:
- Thumbnail image of the GeoTIFF showing the 4-m color
hill-shaded combined multibeam and LIDAR bathymetry collected during
NOAA surveys H11441 and H11224 in geographic, WGS84
- Browse_Graphic_File_Type: JPEG
- Native_Data_Set_Environment:
- Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3;
ESRI ArcCatalog 9.2.6.1500
- Cross_Reference:
-
- Citation_Information:
-
- Originator: Emily B. Christman
- Publication_Date: 2005
- Title: H11441
- Edition: 1.0
- Geospatial_Data_Presentation_Form: document
- Series_Information:
-
- Series_Name: Descriptive Report
- Issue_Identification: H11441
- Publication_Information:
-
- Publication_Place: Atlantic Hydrographic
Branch, Norfolk, VA
- Publisher:
- National Ocean Survey, National Oceanic and
Atmospheric Administration
- Online_Linkage:
- <http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H10001-H12000/H11441/DR/H11441.pdf>
- Cross_Reference:
-
- Citation_Information:
-
- Originator: Darren Stephenson
- Publication_Date: 2004
- Title: H11224
- Edition: 1.0
- Geospatial_Data_Presentation_Form: document
- Series_Information:
-
- Series_Name: Descriptive Report
- Issue_Identification: H11224
- Publication_Information:
-
- Publication_Place: Atlantic Hydrographic
Branch, Norfolk, VA
- Publisher:
- National Ocean Survey, National Oceanic and
Atmospheric Administration
- Online_Linkage:
- <http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H10001-H12000/H11224/DR/H11224.pdf>
- Cross_Reference:
-
- Citation_Information:
-
- Originator: Poppe, L.J.
- Originator: Ackerman, S.D.
- Originator: Doran, E.F.
- Originator: Beaver, A.J.
- Originator: Crocker, J.M.
- Originator: Schattgen, P.T.
- Publication_Date: 2007
- Title:
- Interpolation of reconnaissance multibeam bathymetry
from north-central Long Island Sound
- Edition: 1.0
- Series_Information:
-
- Series_Name: Open-File Report
- Issue_Identification: 2005-1145
- Publication_Information:
-
- Publication_Place: Woods Hole Coastal
and Marine Science Center, Woods Hole, MA
- Publisher: U.S. Geological Survey,
Coastal and Marine Geology Program
- Online_Linkage: <https://pubs.usgs.gov/of/2005/1145/>
- Data_Quality_Information:
-
- Logical_Consistency_Report:
- No additional checks for consistency were performed on this
data.
- Completeness_Report:
- All collected data were processed and used to produce this
dataset.
- Positional_Accuracy:
-
- Horizontal_Positional_Accuracy:
-
- Horizontal_Positional_Accuracy_Report:
- Horizontal position of the launches acquiring
multibeam bathymetry were determined using GPS corrected by U.S. Coast
Guard differential GPS beacon stations at Moriches, New York, and Sandy
Hook, New Jersey. Real-time positioning during LIDAR acquisition was
obtained by an Ashtech GG24 GPS receiver combined with Thales
GeoSolutions Wide Area DGPS. Original horizontal resolution of the MBES
data was 1 m; the final CARIS combined base surface for the MBES data
was produced at a 4-m cell size; original cell size of the gridded
LIDAR data was primarily 4 m.
- Vertical_Positional_Accuracy:
-
- Vertical_Positional_Accuracy_Report:
- Attitude of the launches (e.g. pitch, roll, and
heave) acquiring multibeam bathymetry were monitored by an Applanix TSS
POS/MV 320 Version 3 GPS aided navigation system. Real-time positioning
during LIDAR acquisition was obtained by an Ashtech GG24 GPS receiver
combined with Thales GeoSolutions Wide Area DGPS. Ashtech Z12 GPS
receivers, provided as part of the Airborne System and Ground Systems,
also logged GPS data on the aircraft and at a locally established base
station to provide post processed KGPS position solutions. Received
infrared laser energy, supplemented by an Altitude Heading Reference
System (AHRS) inertial height reference and kinematic GPS, determined
the height of the aircraft. The vertical resolution of the multibeam
data is approximately 0.5% of the water depth. Although there are no
depth attributes associated with the GeoTIFF image, pixel values convey
RGB values of individual cells. Warmer colors (e.g. red) are shallower
depths; cooler colors are deeper.
- Lineage:
-
- Source_Information:
-
- Source_Citation:
-
- Citation_Information:
-
- Originator: Emily B. Christman
- Originator: National Oceanic and
Atmospheric Administration
- Publication_Date: Unknown
- Title: H11441 bathymetry
- Geospatial_Data_Presentation_Form:
raster digital data
- Publication_Information:
-
- Publication_Place: Atlantic
Hydrographic Branch, Norfolk, VA
- Publisher:
- National Ocean Survey, National Oceanic
and Atmospheric Administration
- Type_of_Source_Media: disc
- Source_Time_Period_of_Content:
-
- Time_Period_Information:
-
- Range_of_Dates/Times:
-
- Beginning_Date: 20050427
- Ending_Date: 20050522
- Source_Currentness_Reference: ground
condition
- Source_Contribution: Original processed
multibeam bathymetric data.
- Source_Information:
-
- Source_Citation:
-
- Citation_Information:
-
- Originator: National Oceanic and
Atmospheric Administration
- Originator: Darren Stephenson
- Publication_Date: Unknown
- Title: H11224 bathymetry
- Geospatial_Data_Presentation_Form:
raster digital data
- Publication_Information:
-
- Publication_Place: Atlantic
Hydrographic Branch, Norfolk, VA
- Publisher:
- National Ocean Survey, National Oceanic
and Atmospheric Administration
- Type_of_Source_Media: disc
- Source_Time_Period_of_Content:
-
- Time_Period_Information:
-
- Range_of_Dates/Times:
-
- Beginning_Date: 20040120
- Ending_Date: 20040305
- Source_Currentness_Reference: ground
condition
- Source_Contribution: Original processed
LIDAR bathymetric data.
- Process_Step:
-
- Process_Description:
- Two 8.5-m aluminum Jensen launches deployed from the
NOAA Ship Thomas Jefferson were used to acquire the multibeam
echosounder (MBES) bathymetric data for surveys H11441 and H11442
during April - May 2005 off New London, Connecticut. Although most of
the deeper parts of these surveys were completely covered during MBES
acquisition, coverage in the shallower areas (<10 m) was limited to
'postage stamp' developments around target areas and reconnaissance
cross lines. The MBES data were collected with hull-mounted RESON
SeaBat 240-kHz 8101 and 455-kHz 8125 shallow-water systems. These
systems measure two-way sound travel time across a 150-degree swath and
120-degree swath, respectively. The SeaBat 8101 has 101 beams at a
1.5-degree beam spacing. The SeaBat 8125 has 240 beams with a
cross-track beam width of 0.5 degrees at nadir. Original horizontal
resolution of the MBES data was 1 m; vertical resolution of the MBES
data is about 0.5% of the water depth. The bathymetric data were
acquired in XTF (extended Triton data format) and processed by NOAA
using CARIS HIPS (Hydrographic Image Processing System) software for
quality control, to incorporate sound velocity and tidal corrections,
and to produce the continuous digital terrain model. Navigation was by
TSS POS/MV 320 differential GPS-assisted inertial navigation systems;
the differential GPS beacons used were from Moriches, New York, and
Sandy Hook, New Jersey. HYPACK MAX was used for acquisition line
navigation. 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 MBES acquisition. Tidal
zone corrections were calculated from data acquired from National Water
Level Observation stations at New London, Connecticut and Montauk, New
York. Vertical datum is mean lower low water. Individuals interested in
detail descriptions of the MBES acquisition and processing should
consult the descriptive reports. Eleven reconnaissance cruises were
conducted aboard a leased lobster boat to monitor water clarity prior
to commencement of airborne LIDAR operations of surveys H11224 and
H11225. These cruises, which utilized Secchi disks to determine water
clarity, were conducted between the Connecticut River and Fishers
Island during May 9, 2003 and January 11, 2004, when water clarity was
deemed adequate. The LIDAR (light detection and ranging) data were
acquired by Tenix LADS, Inc. during January 25 - March 3, 2004 with a
LADS Mk II system. Airborne survey operations were conducted aboard a
Dash 8-202 series aircraft with a Nd:YAG laser at heights between 1,200
and 2,200 feet, at ground speeds between 140 and 210 knots, and at 4x4
and 3x3-m laser-spot spacings. Green laser pulses were scanned beneath
the aircraft in a rectilinear pattern. The returned green-laser energy
reflected from the sea surface and seafloor were captured and digitally
recorded. Received infrared laser energy, supplemented by an Altitude
Heading Reference System (AHRS) inertial height reference and kinematic
GPS, determined the height of the aircraft. Real-time positioning was
provided by WADGPS (wide area differential global positioning system).
Acquired data were processed with CARIS HIPS. Individuals interested in
detail descriptions of the LIDAR acquisition and processing should
consult the descriptive reports. Vertical datum is mean lower low
water; X and Y units are meters; UTM Zone 18, NAD83. The final CARIS
combined base surfaces were produced at a 4-m cell size for surveys
H11441, H11224, and H11225; the final CARIS combined base surface for
survey H11442 was produced at a 3-m cell size.
- Process_Date: Unknown
- Source_Produced_Citation_Abbreviation:
H11441 CARIS HIPS database
- Source_Produced_Citation_Abbreviation:
H11224 CARIS HIPS database
- Source_Produced_Citation_Abbreviation:
H11442 CARIS HIPS database
- Source_Produced_Citation_Abbreviation:
H11225 CARIS HIPS database
- Process_Contact:
-
- Contact_Information:
-
- Contact_Organization_Primary:
-
- Contact_Organization: National
Oceanic and Atmospheric Administration
- Contact_Person: Marc Moser
- Contact_Position: Field Operations
Officer
- Contact_Address:
-
- Address_Type: mailing address
- Address: 439 West York Street
- City: Norfolk
- State_or_Province: VA
- Postal_Code: 23510
- Country: USA
- Contact_Voice_Telephone: 757-441-6746
- Contact_Electronic_Mail_Address:
marc.s.moser@noaa.gov
- Process_Step:
-
- Process_Description:
- The CARIS field sheets for four surveys were
inspected to determine if there was vertical and/or horizontal offsets
where the surveys overlapped. NOAA LIDAR surveys (H11224 and H11225)
showed no relative offset in either the vertical or horizontal
direction. The same was found for the two adjacent NOAA multibeam
surveys (H11441 and H11442). However, a consistent 25-cm vertical
offset was found between the multibeam and LIDAR data sets, with the
multibeam data being consistently 25 cm shallower than the overlapping
LIDAR survey. To correct this problem, it was decided that multibeam
surveys H11441 and H11442 would be offset (deeper) by 25 cm and thus
referenced to LIDAR surveys H11224 and H11225. After reviewing the Data
Acquisition and Processing Reports (DAPR) in addition to the
Descriptive Report (DR) for each of the 4 surveys, 25 cm is within the
vertical error budget as reported by Tenix for the LADS system, and as
reported for the Reson 8101 and 8125 systerms installed on the NOAA
launches. Vertical control was the same for all surveys. Since the 25
cm offset was not outside of the error analyses for all surveys, it was
decided to reference the multibeam data to the LIDAR data by lowering
the multibeam depth soundings, mainly to keep the 0 LIDAR depth contour
(sea surface as obtained by the LADS system) at sea level, but also
because the Tenix LADS surveys were conducted using real-time kinematic
GPS techniques and judged to be accurate in the vertical dimension.
- Source_Used_Citation_Abbreviation: H11441
CARIS HIPS database
- Source_Used_Citation_Abbreviation: H11442
CARIS HIPS database
- Source_Used_Citation_Abbreviation: H11224
CARIS HIPS database
- Source_Used_Citation_Abbreviation: H11225
CARIS HIPS database
- Process_Date: 2009
- Process_Contact:
-
- Contact_Information:
-
- Contact_Person_Primary:
-
- Contact_Person: Bill Danforth
- Contact_Organization: U.S.
Geological Survey
- Contact_Position: Geologist
- Contact_Address:
-
- Address_Type: mailing and
physical address
- Address: 384 Woods Hole Road
- City: Woods Hole
- State_or_Province: MA
- Postal_Code: 02543-1598
- Contact_Voice_Telephone:
508-548-8700 x2274
- Contact_Facsimile_Telephone:
508-457-2310
- Contact_Electronic_Mail_Address:
bdanforth@usgs.gov
- Process_Step:
-
- Process_Description:
- The field sheets from surveys H11441 and H11224
(average depths, not the shoal based field sheets) were imported into
the Fledermaus v6.7 program DMagic to make equivalent digital terrain
model (DTM) files. The floating piont format for each sounding depth
point is preserved during data import. Additionally, these fieldsheets
were imported into DMagic as "gridded data", therefore re-gridding of
data did not occur during the import process and thus preserved the
original resolutions of the CARIS fieldsheets: H11441 4 meter cell size
H11224 4 meter cell size The H11441 DTM file was then exported as an
ESRI ASCII raster file from the DMagic program. The export process
preserves the floating point values of the grid cell nodes.
- Source_Used_Citation_Abbreviation: H11441
CARIS HIPS database
- Source_Used_Citation_Abbreviation: H11224
CARIS HIPS database
- Process_Date: 2009
- Source_Produced_Citation_Abbreviation:
h11441.dtm
- Source_Produced_Citation_Abbreviation:
h11224.dtm
- Source_Produced_Citation_Abbreviation:
h11441.asc
- Process_Contact:
-
- Contact_Information:
-
- Contact_Person_Primary:
-
- Contact_Person: Bill Danforth
- Contact_Organization: U.S.
Geological Survey
- Contact_Position: Geologist
- Contact_Address:
-
- Address_Type: mailing and
physical address
- Address: 384 Woods Hole Road
- City: Woods Hole
- State_or_Province: MA
- Postal_Code: 02543
- Country: USA
- Contact_Voice_Telephone:
508-548-8700 x2274
- Contact_Facsimile_Telephone:
508-457-2310
- Contact_Electronic_Mail_Address:
bdanforth@usgs.gov
- Process_Step:
-
- Process_Description:
- The ESRI ASCII raster files were imported into ArcMap
v9.3 using the ASCII to Raster tool (ArcToolbox, Conversion Tools, To
Raster). The only option set here is to import each sounding grid cell
value as a floating point number. Subsequently, 25 cm was added to the
H11441 raster grid cells, creating a new raster that could now be
combined with the LIDAR data sets. The H11441 raster file was then
exported out of ArcMap using the Raster to ASCII tool (ArcToolbox,
Conversion Tools, From Raster).
- Source_Used_Citation_Abbreviation: h11441.asc
- Process_Date: 2009
- Source_Produced_Citation_Abbreviation:
h11441.asc
- Process_Contact:
-
- Contact_Information:
-
- Contact_Person_Primary:
-
- Contact_Person: Bill Danforth
- Contact_Organization: U.S.
Geological Survey
- Contact_Position: Geologist
- Contact_Address:
-
- Address_Type: mailing and
physical address
- Address: 384 Woods Hole Road
- City: Woods Hole
- State_or_Province: MA
- Postal_Code: 02543-1598
- Contact_Voice_Telephone:
508-548-8700 x2274
- Contact_Facsimile_Telephone:
508-457-2310
- Contact_Electronic_Mail_Address:
bdanforth@usgs.gov
- Process_Step:
-
- Process_Description:
- The adjusted multibeam raster was imported back into
the Fledermaus v6.7 DMagic program in order to create a new DTM file
that could be combined with the LIDAR DTM file. The floating piont
format for each sounding depth point is preserved during data import.
Additionally, the data from the ArcGIS ASCII raster files were imported
into DMagic as "gridded data", therefore re-gridding of data did not
occur during the import process and thus preserved the original
resolutions of the CARIS fieldsheets.
- Source_Used_Citation_Abbreviation: h11441.asc
- Process_Date: 2009
- Source_Produced_Citation_Abbreviation:
h11441.dtm
- Process_Contact:
-
- Contact_Information:
-
- Contact_Person_Primary:
-
- Contact_Person: Bill Danforth
- Contact_Organization: U.S.
Geological Survey
- Contact_Position: Geologist
- Contact_Address:
-
- Address_Type: mailing and
physical address
- Address: 384 Woods Hole Road
- City: Woods Hole
- State_or_Province: MA
- Postal_Code: 02543-1598
- Contact_Voice_Telephone:
508-548-8700 x2274
- Contact_Facsimile_Telephone:
508-457-2310
- Contact_Electronic_Mail_Address:
bdanforth@usgs.gov
- Process_Step:
-
- Process_Description:
- The DTM files from surveys H11441 (now 25 cm deeper)
and H11224 were combined into one 4-m grid file using the Fledermaus
command line option dtmmerge, and the combined H11441-H11224 grid was
exported from DMagic as an ESRI ASCII raster file. The dtmmerge option
combines the input grid files and sets the resolution of the output
combined grid to the lowest resolution input grid, in this case the
4-meter LIDAR grid. Additionally the output soundings for the combined
grid is based on the average of the nearest input grid soundings for a
particular output grid cell. The command line used was:
dtmmerge -in h11224.dtm h11441.dtm -out nlondon.dtm -cellsize 4.0 -mode
average
- Source_Used_Citation_Abbreviation: h11441.dtm
- Source_Used_Citation_Abbreviation: h11224.dtm
- Process_Date: 2009
- Source_Produced_Citation_Abbreviation:
nlondon.asc
- Process_Contact:
-
- Contact_Information:
-
- Contact_Person_Primary:
-
- Contact_Person: Bill Danforth
- Contact_Organization: U.S.
Geological Survey
- Contact_Position: Geologist
- Contact_Address:
-
- Address_Type: mailing and
physical address
- Address: 384 Woods Hole Road
- City: Woods Hole
- State_or_Province: MA
- Postal_Code: 02543-1598
- Contact_Voice_Telephone:
508-548-8700 x2274
- Contact_Facsimile_Telephone:
508-457-2310
- Contact_Electronic_Mail_Address:
bdanforth@usgs.gov
- Process_Step:
-
- Process_Description:
- The ESRI ASCII raster file was then converted into
raster within ArcToolbox v9.3 using the ASCII to Raster conversion
tool, and reprojected using the data management tool Project Raster
(ArcToolbox, Data Management Tools, Projections and Transformations)
from UTM Zone 18N, NAD 83 to Geographic, WGS84. The options specified
in the Project Raster tool were: 1. Input coordinate system:
NAD_1983_UTM_Zone_18N 2. Output coordinate system: GCS_WGS_1984 3.
Geographic transformation method: NAD_1983_WGS_1984_5 4. Resampling
technique: BILINEAR 5. Output cell size: 0.000043 (decimal degrees,
default as calculated by ArcMap for a 4 meter cell size) The geographic
transformation selected is the most accurate one provided by ESRI as it
ties in WGS84 with ITRF96, thus reflecting the earth centered offset
(x-y-z) between WGS84 and NAD83 (from the ESRI Knowledge Base Document
Number 24159).
- Source_Used_Citation_Abbreviation:
nlondon.asc
- Process_Date: 2009
- Source_Produced_Citation_Abbreviation:
nlondon_geo
- Process_Contact:
-
- Contact_Information:
-
- Contact_Person_Primary:
-
- Contact_Person: Bill Danforth
- Contact_Organization: U.S.
Geological Survey
- Contact_Position: Geologist
- Contact_Address:
-
- Address_Type: mailing and
physical address
- Address: 384 Woods Hole Road
- City: Woods Hole
- State_or_Province: MA
- Postal_Code: 02543-1598
- Contact_Voice_Telephone:
508-548-8700 x2274
- Contact_Facsimile_Telephone:
508-457-2310
- Contact_Electronic_Mail_Address:
bdanforth@usgs.gov
- Process_Step:
-
- Process_Description:
- A color, hill-shaded GeoTIFF images with world file
was created within DMagic and IVS Image Viewer. Sun illumination is
from the north at 45 degrees above the horizon, and vertical
exaggeration is 4x.
- Source_Used_Citation_Abbreviation:
nlondon_geo
- Process_Date: 2009
- Source_Produced_Citation_Abbreviation:
nlondon_mblidar_geo.tif
- Source_Produced_Citation_Abbreviation:
nlondon_mblidar_geo.tfw
- Process_Contact:
-
- Contact_Information:
-
- Contact_Person_Primary:
-
- Contact_Person: Bill Danforth
- Contact_Organization: U.S.
Geological Survey
- Contact_Position: Geologist
- Contact_Address:
-
- Address_Type: mailing and
physical address
- Address: 384 Woods Hole Road
- City: Woods Hole
- State_or_Province: MA
- Postal_Code: 02543-1598
- Contact_Voice_Telephone:
508-548-8700 x2274
- Contact_Facsimile_Telephone:
508-457-2310
- Contact_Electronic_Mail_Address:
bdanforth@usgs.gov
- Spatial_Data_Organization_Information:
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- Direct_Spatial_Reference_Method: Raster
- Raster_Object_Information:
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- Raster_Object_Type: Pixel
- Row_Count: 3235
- Column_Count: 2994
- Vertical_Count: 1
- Spatial_Reference_Information:
-
- Horizontal_Coordinate_System_Definition:
-
- Geographic:
-
- Latitude_Resolution: 0.000043
- Longitude_Resolution: 0.000043
- Geographic_Coordinate_Units: Decimal degrees
- Geodetic_Model:
-
- Horizontal_Datum_Name: D_WGS_1984
- Ellipsoid_Name: WGS_1984
- Semi-major_Axis: 6378137.000000
- Denominator_of_Flattening_Ratio: 298.257224
- Vertical_Coordinate_System_Definition:
-
- Depth_System_Definition:
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- Depth_Datum_Name: Mean lower low water
- Depth_Distance_Units: meters
- Entity_and_Attribute_Information:
-
- Overview_Description:
-
- Entity_and_Attribute_Overview:
- There are no attributes associated with the GeoTiff
image. Pixel values convey RGB values of individual cells. Warmer
colors (e.g. red) are shallower depths; cooler colors (e.g. blues) are
deeper.
- Distribution_Information:
-
- Distributor:
-
- Contact_Information:
-
- Contact_Organization_Primary:
-
- Contact_Organization: U.S. Geological
Survey
- Contact_Person: Larry Poppe
- Contact_Position: Geologist
- Contact_Address:
-
- Address_Type: mailing and physical
address
- Address: 384 Woods Hole Road
- City: Woods Hole
- State_or_Province: MA
- Postal_Code: 02543-1598
- Country: USA
- Contact_Voice_Telephone: (508) 548-8700 x2314
- Contact_Facsimile_Telephone: (508) 457-2310
- Contact_Electronic_Mail_Address:
lpoppe@usgs.gov
- Resource_Description: Downloadable Data
- Distribution_Liability:
- Neither the U.S. Government, the Department of the Interior,
nor the USGS, nor the National Oceanic and Atmospheric Administration
(NOAA), nor the Connecticut Department of Environmental Protection (CT
DEP) 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. The act of
distribution shall not constitute any such warranty, and no
responsibility is assumed by the USGS, NOAA, or the CT DEP 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.
- Standard_Order_Process:
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- Digital_Form:
-
- Digital_Transfer_Information:
-
- Format_Name: TIFF
- Format_Specification: GeoTIFF
- Format_Information_Content:
- One file (nlondon_mblidar_geo.zip) containing the
GeoTIFF, world file, browse graphic and metadata.
- File_Decompression_Technique: zip archive
- Transfer_Size: 5.2
- Digital_Transfer_Option:
-
- Online_Option:
-
- Computer_Contact_Information:
-
- Network_Address:
-
- Network_Resource_Name:
- <https://pubs.usgs.gov/of/2009/1231/data/bathy/geotifs/nlondon/nlondon_mblidar_geo.zip>
- Network_Resource_Name: <https://pubs.usgs.gov/of/2009/1231/html/catalog.html>
- Access_Instructions: Data are
downloadable via the World Wide Web (WWW).
- Offline_Option:
-
- Offline_Media: CD-ROM
- Recording_Capacity:
-
- Recording_Density: 640
- Recording_Density_Units: Mbytes
- Recording_Format: ISO9660
- Fees: None
- Technical_Prerequisites:
- This image is available as a GeoTIFF image with an
accompanying world file. To utilize this data, the user must have an
image viewer, image processing or GIS software package capable of
importing a GeoTIFF image. The user must have software capable of
uncompressing archived zip files, such as WinZip or Pkware.
- Available_Time_Period:
-
- Time_Period_Information:
-
- Single_Date/Time:
-
- Calendar_Date: 2010
- Metadata_Reference_Information:
-
- Metadata_Date: 20091208
- Metadata_Contact:
-
- Contact_Information:
-
- Contact_Person_Primary:
-
- Contact_Person: Larry Poppe
- Contact_Organization: U.S. Geological
Survey
- Contact_Position: Geologist
- Contact_Address:
-
- Address_Type: mailing and physical
address
- Address: 384 Woods Hole Road
- City: Woods Hole
- State_or_Province: MA
- Postal_Code: 02543-1598
- Country: USA
- Contact_Voice_Telephone: (508) 548-8700 x2314
- Contact_Facsimile_Telephone: (508) 457-2310
- Contact_Electronic_Mail_Address:
lpoppe@usgs.gov
- Metadata_Standard_Name: FGDC Content Standards for
Digital Geospatial Metadata
- Metadata_Standard_Version: FGDC-STD-001-1998
- Metadata_Time_Convention: local time
- Metadata_Access_Constraints: None
- Metadata_Use_Constraints: None
- Metadata_Extensions:
-
- Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
- Profile_Name: ESRI Metadata Profile
Generated by mp
version 2.9.6 on Tue Dec 08 07:23:03 2009