U.S. Geological Survey
2014
Survey tracklines of chirp subbottom data collected by the U.S. Geological Survey in Moultonborough Bay, Lake Winnipesaukee, New Hampshire in 2005 (Geographic, WGS 84, Esri polyline shapefile, CHIRP_TRK.SHP)
1.0
vector digital data
data release
DOI:10.5066/F71N7Z4H
Woods Hole Coastal and Marine Science Center, Woods Hole, Massachusetts
U.S. Geological Survey, Coastal and Marine Geology Program
https://doi.org/10.5066/F71N7Z4H
https://cmgds.marine.usgs.gov/data/field-activity-data/2005-004-FA/
https://cmgds.marine.usgs.gov/data/field-activity-data/2005-004-FA/data/seismics/2005-004-FA_chirptrk.zip
Denny, J.F.
Danforth, W.W.
Worley, C.R.
Irwin, B.J.
2014
High-resolution geophysical and sample data collected in Moultonborough Bay, Lake Winnipesaukee, New Hampshire in 2005, USGS Field Activity 2005-004-FA
1.0
data release
DOI:10.5066/F71N7Z4H
Reston, VA
U.S. Geological Survey
https://doi.org/10.5066/F71N7Z4H
In freshwater bodies of New Hampshire, the most problematic aquatic invasive plant species is Myriophyllum heterophyllum or variable leaf water-milfoil. Once established, variable leaf water-milfoil forms dense beds that can alter the limnologic characteristics of a waterbody, impacting natural lacustrine communities and their habitats. Variable leaf water-milfoil infestations also disrupt recreational uses of waterbodies and have negatively affected swimming, boating, fishing, and property values in and around several lakes and ponds in New Hampshire.
In 1965, Moultonborough Bay, Lake Winnipesaukee became the first waterbody in New Hampshire where variable leaf water-milfoil was observed. Variable leaf water-milfoil is native to the Southeastern and Midwestern areas of the United States where more alkaline waters appear to limit the growth of this plant. Outside its native range, however, it adapts well to the relatively acidic, low-alkalinity, and nutrient-poor conditions of oligotrophic lakes and bays similar to Moultonborough Bay.
In 2005, the New Hampshire Department of Environmental Services (NHDES) collaborated with the U.S. Geological Survey to investigate the distribution (presence and density) of variable leaf water-milfoil in Moultonborough Bay. This study utilized geophysical systems and conventional water-quality measurements to identify lake-floor environments that may provide suitable habitat for the establishment and growth of variable leaf water-milfoil. The results of the study are intended to assist resource managers in federal and state agencies by providing methods for detecting variable leaf water-milfoil and for identifying areas susceptible to infestation. Ultimately, this information may lead to early detection, prevention, and more effective mitigation strategies.
Field activity information for this cruise is available on-line through the U.S. Geological Survey Coastal and Marine Geoscience Data System https://cmgds.marine.usgs.gov/fan_info.php?fa=2005-004-FA.
This shapefile contains approximately 37 kilometers of seismic trackline data collected with an Edgetech SB-424 chirp subbottom profiler by the U.S. Geological Survey during USGS survey 2005-04-FA. These data were collected in Moultonborough Bay, Lake Winnipesaukee, New Hampshire as part of a collaborative USGS and New Hampshire Department of Environmental Services research program to assess the distribution of variable leaf water-milfoil. The seismic trackline data are used in conjunction with the unique shot point navigation to aid interpretation and correlate features visible within the seismic record with features within the sidescan-sonar and bathymetric data (i.e. surficial sediment distribution and topography).
20050726
ground condition
None planned
-71.390529
-71.361101
43.728549
43.710921
None
U.S. Geological Survey
USGS
Coastal and Marine Geology Program
CMGP
Woods Hole Coastal and Marine Science Center
WHCMSC
Marine Geology
field activity number 2005-004-FA
USGS CMGP InfoBank ID R-1-05-NH
field activity number 05004
subbottom profiler
seismic
chirp
Edgetech SB-424 subbottom profiler
polyline shapefile
tracklines
survey line
R/V Rafael
ISO 19115 Topic Category
inlandWaters
location
None
North America
United States
New Hampshire
Lake Winnipesaukee
Moultonborough Bay
None.
Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset.
Jane F. Denny
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
Massachusetts
02543
USA
508-548-8700 x 2311
508-457-2310
jdenny@usgs.gov
https://cmgds.marine.usgs.gov/data/field-activity-data/2005-004-FA/data/seismics/2005-004-FA_chirptrk.jpg
Image showing survey tracklines of chirp subbottom data collected by the U.S. Geological Survey in Moultonborough Bay, Lake Winnipesaukee, New Hampshire, 2005
JPEG
Microsoft Windows Vista Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 9.3.1.4095
Denise M. Argue
Richard G. Kiah
Jane F. Denny
Jeffrey R. Deacon
William W. Danforth
Craig M. Johnston
Amy P. Smagula
2007
Relation of Lake-Floor Characteristics to the Distribution of Variable Leaf Water-Milfoil in Moultonborough Bay, Lake Winnipesaukee, New Hampshire, 2005
1.0
document
Scientific Investigations Report
2007-5125
Reston, Virginia
U.S. Geological Survey
https://pubs.usgs.gov/sir/2007/5125/
John Stockwell
2005
Seismic Un*x
document
Golden, Colorado, USA
Center for Wave Phenomena - Colorado School of Mines
http://www.cwp.mines.edu/cwpcodes/index.html
Barry, K.M.
Cavers, D.A.
Kneale, C.W.
1975
Report on recommended standards for digital tape formats
document
Geophysics
v. 40, no. 02, p. 344-352.
Houston, Texas
Society of Exploration Geophysicists (SEG)
http://www.seg.org/documents/10161/77915/seg_y_rev0.pdf
All attributes were evaluated during processing as standard quality control to ensure attributes contain accurate and relevant information and values.
All subbottom data were collected during USGS cruise 2005-004-FA using an Edgetech SB-424 chirp subbottom profiler. Seismic trackline navigation was generated from unique shot navigation for the seismic system. The unique shot navigation data were evaluated during processing for spurious points; all spurious points were removed prior to generating the trackline navigation.
This shapefile contains lines 43 - 81, 84 - 112 of chirp subbottom data collected on JD 207(07/26/2005) during USGS field activity 2005-004-FA. Lines 43 - 81, 84 - 112 were a 'rerun' of lines 1 - 42 to try to improve on the data quality as there were significant system errors and malfunctions during data collection on JD 206 (07/25/2005). Lines 1 - 42 are not included in this dataset. They were not used for interpretative purposes.
Navigation was acquired with Wide Area Augmentation System (WAAS), which is accurate to + or - 1 to 2 meters, horizontally. Navigation data were acquired with a LGBX Pro receiver and sent to Triton-Elics Delph seismic acquisition software, where Chirp sub-bottom data were recorded in Society of Exploration Geophysicists Y (SEG-Y) format (Barry and others, 1975) with DGPS logged to the SEG-Y trace headers.
The Edgetech SB-424 chirp subbottom profiler was towed near the surface, close to the R/V Rafael. The instrument was secured in this position throughout the survey. Due to this tow configuration, any layback was minimal. The overall horizontal accuracy, given even a small (~ 1 meter) offset between the WAAS antenna and the tow-body, is + or - 5 meters.
U.S. Geological Survey
Unpublished Material
Raw Chirp Subbottom Data
online
20050726
ground condition
none
Chirp subbottom data were acquired with an Edgetech SB-424 chirp subbottom profiler. The SB-424 was deployed off the port side of the USGS R/V Rafael and towed close to the lake surface. Approximately 37 km of chirp subbottom data were collected.
Data were recorded at a 75-millisecond (ms) record length (1875 samples, 40 microsecond sample interval) and a 4-24 kHz sweep and were logged using Triton-Elics Delph seismic acquisition software (version 2005) in Society of Exploration Geophysicists Y (SEG-Y) format (Barry and others, 1975) with WAAS navigation logged to the SEG-Y file trace headers. Navigation in the SEG-Y header was stored as seconds of arc. The raw chirp SEG-Y contained 3 channels: raw, match-filtered, and envelope detected. The envelope detected channel was used for data processing.
A C-shell script was executed using Sioseis (v. 2011.2.7) to read the raw SEG-Y file and write out a new SEG-Y file with the shots renumbered starting at 1. A second C-shell script was executed using Seismic Unix (version 4.1) to read the renumbered SEG-Y files, write a Seismic Unix format file (*.su), and extract SEG-Y trace header information, which included shot number, source x (arc seconds), source y (arc seconds), year, Julian Day, hour, minute, second (UTC). Geographic coordinates (stored in arc seconds WGS 84) were converted to eastings and northings, UTM, Zone 19N, meters using proj (v. 4.7.1). Before saving the header information to a text file, the data were filtered using AWK (no version) to save only unique shot point locations. The unique shot navigation for each seismic line were then concatenated into a comma delimited (.csv) text file. The header records for the first several shots contained no navigation information, therefore the 'first' shot of the line is considered the first shot with usable data stored in the header. This was generally within the first 10 shots for the majority of lines.
(Stockwell, 2005)
Jane F. Denny performed this and all subsequent process steps.
2013
Jane F. Denny
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
Massachusetts
02543
USA
508-548-8700 x2311
508-457-2310
jdenny@usgs.gov
The text file (*.csv) was imported into Esri ArcMap 9.3 using ArcCatalog, Create Feature Class from XY Table, specifying UTM, Zone 19N, WGS 84 coordinate system.
XTools Pro (v. 7.1.0), Feature Conversion, Make one polyline from points, was used to generate a polyline shapefile from the unique shot point shapefile. The 'line' field was used as the 'ID Field' to use the unique shot points from each line to generate a unique polyline for each seismic line collected during the USGS field activity 2005-004-FA. 'Use input features order' was also specified.
The polyline shapefile was then reprojected to Geographic Coordinate System, WGS 84 (GCS_WGS_1984), using ArcCatalog, Project.
2013
Cruise, System, Acq_Date fields were added to the attribute table within ArcMap 9.3. The length of each line segment was calculated and included in a new attribute field using XTools Pro for ArcGIS desktop (version 7.1.0), specifying UTM Zone 19 N, WGS 84 - meters.
2013
The online links to the data were updated to reflect the new server hosting the data. Additionally, other small edits could be made to the metadata, such as modifying http to https where appropriate. The metadata date (but not the metadata creator) was edited to reflect the date of these changes.
20170406
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
String
69
0.000001
0.000001
Decimal degrees
D_WGS_1984
WGS_1984
6378137.000000
298.257224
2005-004-FA_chirptrk
Trackline navigation for chirp subbottom data collected by the U.S. Geological Survey during field activity 2005-004-FA in Moultonborough Bay, Lake Winnipesaukee, New Hampshire, 2005
U.S. Geological Survey
FID
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
Feature geometry.
Esri
Coordinates defining the features.
Line
Line and file number for corresponding seismic files. This information is used during data acquisition, processing and archival. Format: L1F1, where L = Line; 1 = Line number; F= File; 1 = File number.
U.S. Geological Survey
String up to 254 characters
Cruise
Unique USGS field activity identification number in the format YYYY-NNN-FA where YYYY is the field activity year, NNN represents the number assigned to the field activity within that year, and FA stands for field activity.
U.S. Geological Survey
String up to 50 characters
System
Chirp subbottom profiling system used to acquire seismic data during USGS field activity 2005-004-FA.
U.S. Geological Survey
String up to 50 characters
Acq_Date
Date of data acquisition. Format MM/DD/YYYY.
U.S. Geological Survey
String up to 50 characters
Length
Length of each polyline (meters). Generated from ArcGIS 9.3 Xtools pro (v. 7.1.0) using UTM Zone 19N, WGS 84, meters projection
U.S. Geological Survey
44.2
4136.6
meters
Jane F. Denny
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
Massachusetts
02543
USA
508-548-8700 x2311
508-457-2310
jdenny@usgs.gov
The file 2005-004-FA_chirptrk.zip contains the shapefile 2005-004-FA_chirptrk.shp and other files associated with the shapefile. In addition to the shapefile, the zip file also contains the browse graphic (2005-004-FA_chirptrk.jpg) and the FGDC CSDGM metadata in the following formats: XML, HTML, FAQ and text.
Neither the U.S. Government, the Department of the Interior, nor the USGS, 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 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.
Shapefile
ArcGIS 9.0
Esri polyline shapefile
Zip file containing the chirp subbottom profiler trackline data from the Moultonborough Bay, Lake Winnipesaukee, New Hampshire survey area. This also includes associated metadata.
Use WinZip, 7zip, Peazip or pkUnzip
0.2
https://cmgds.marine.usgs.gov/data/field-activity-data/2005-004-FA/data/seismics/2005-004-FA_chirptrk.zip
https://cmgds.marine.usgs.gov/data/field-activity-data/2005-004-FA/
https://doi.org/10.5066/F71N7Z4H
Data can be downloaded via the Internet
none
This zip file contains data available in Esri shapefile format. The zip file also contains associated metadata. The user must have ArcGIS or ArcView 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing the data. A free data viewer, ArcGIS Explorer, capable of displaying the data is available from Esri at www.esri.com.
20170406
Jane F. Denny
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
Massachusetts
02543
USA
508-548-8700 x2311
508-457-2310
jdenny@usgs.gov
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
local time