John F. Bratton
VeeAnn A. Cross
2011
Ship Trackline along which Continuous Resistivity Profile Data were Collected in the Corsica River Estuary, Maryland on May 16, 2007 on USGS Cruise 07005 (RESGPSLNS_JD136.SHP)
vector digital data
Open-File Report
2010-1094
Woods Hole Coastal and Marine Science Center, Woods Hole, MA
U.S. Geological Survey, Coastal and Marine Geology Program
https://doi.org/10.3133/ofr20101094
https://pubs.usgs.gov/of/2010/1094/html/catalog.html
https://pubs.usgs.gov/of/2010/1094/data/navigation/resgpslns_jd136.zip
VeeAnn A. Cross
John F. Bratton
Charles R. Worley
John Crusius
Kevin D. Kroeger
2011
Continuous resistivity profiling data from the Corsica River Estuary, Maryland
Open-File Report
2010-1094
Reston, VA
U.S. Geological Survey
https://pubs.usgs.gov/of/2010/1094/
Submarine groundwater discharge (SGD) into Maryland's Corsica River Estuary was investigated as part of a larger study to determine the importance of nutrient delivery to Chesapeake Bay via this pathway. Resource managers are concerned about nutrients that are entering the estuary via submarine groundwater discharge from this primarily agricultural watershed that may be contributing to eutrophication, harmful algal blooms, and fish kills. An interdisciplinary U.S. Geological Survey (USGS) science team conducted field operations in the estuary in April and May 2007. Techniques used included continuous resistivity profiling (CRP), piezometer sampling, seepage meter measurements, and collection of a radon tracer time series. Better understanding of the style, locations, and rates of groundwater discharge could lead to improved models and mitigation strategies for estuarine nutrient over-enrichment in the Corsica River Estuary, and other similar settings. More information on the field work can be accessed from the Woods Hole Coastal and Marine Science Center Field Activity webpage: https://cmgds.marine.usgs.gov/fan_info.php?fan=2007-005-FA.
The purpose of this polyline shapefile is to indicate the ship's position during the continuous resistivity profile survey on May 16, 2007 in the Corsica River Estuary, Maryland. These lines can also be used to hyperlink to JPEG images of the corresponding resistivity profile enabling the resistivity data to be placed in spatial context with other GIS data.
20070516
ground condition
None planned
-76.149983
-76.106650
39.087067
39.074133
USGS Metadata Identifier
USGS:4d08a718-07e8-4e66-897f-84638b80886c
None
U.S. Geological Survey
USGS
Coastal and Marine Geology Program
CMGP
Woods Hole Coastal and Marine Science Center
WHCMSC
Field Activity Serial Number 07005
Field Activity Number 2007-005-FA
Info Bank ID T-1-07-CH
navigation
polyline
shapefile
Continuous Resistivity Profiling
CRP
Lowrance GPS
R/V Terrapin
ISO 19115 Topic Category
inlandWaters
location
oceans
elevation
USGS Thesaurus
navigational data
continuous resistivity profiling
geospatial datasets
None
North America
North Atlantic
United States
Maryland
Corsica River Estuary
Chesapeake Bay
None.
The 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.
John F. Bratton
U.S. Geological Survey
mailing and physical address
Woods Hole Coastal and Marine Science Center
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
(508) 548-8700 x2254
(508) 457-2310
jbratton@usgs.gov
Current address:
NOAA/GLERL
4840 S. State Rd.
Ann Arbor MI 48108-9719
734-741-2235
John.Bratton@noaa.gov
https://pubs.usgs.gov/of/2010/1094/data/navigation/resgpslns_jd136.gif
Thumbnail image showing the location of resistivity tracklines collected May 16, 2007. The coastline is included for spatial reference.
GIF
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.2.6.1500
Each line was generated in the same manner. The "hyperlink" files point to profiles with valid bathymetry data. For L24F1, L24F2, L25F1, L26F1, L27F1_part1, L27F1_part2 and L28F1 this means the hyperlinks point to the modified processed data in which bathymetry was derived from supplemental sources as the original data acquisition did not have bathymetry.
All the points in the input shapefile were used to generate these polylines. These lines represent all the survey lines from this day.
The navigation system used was a Lowrance 480M with an LGC-2000 Global Positioning System (GPS) antenna. The antenna was located at the anchor point for the resistivity streamer, which is also directly above the fathometer transducer mount point. The GPS system is published to be accurate to within 10 meters.
All collected bathymetry values were collected by the 200 kHz Lowrance fathometer. The fathometer was mounted starboard side aft, directly below the GPS antenna and the resistivity streamer tow point. The Lowrance manufacturer indicates the speed of sound used by the system to convert to depths is 4800 feet/second. All values are assumed to be accurate to within 1 meter.
The continuous resistivity profile (CRP) system used on this cruise was an AGI SuperSting marine system described at the website: www.agiusa.com/marinesystem.shtml. The particular system used for this acquisition was a 50-m streamer with an 11 electrode array with electrodes spaced 5 meters apart. The source electrodes are graphite, while the receiver electrodes are stainless steel. A dipole-dipole configuration was used for the data collection in which two fixed current electrodes are assigned with the measurement of voltage potential between electrode pairs in the remaining electrodes. The maximum depth below the water surface the streamer can reach is approximately ΒΌ the streamer length. So for the 50-m streamer, maximum depth is about 12.5 meters. Each line of data acquisition records several files. The two files necessary for processing are the *.stg and the *.gps file. The STG file contains the resistivity data, while the GPS file contains the navigation information. The navigation system used in concert with the CRP system is a Lowrance LMS-480M with an LGC-2000 GPS antenna and a 200 kHz fathometer transducer. The transducer also contains a temperature sensor. Lowrance indicates the speed of sound used by the system is 4800 feet/second. Both the temperature and depth information are recorded in the logged GPS file. There are instances where no depth or temperature information is recorded due to an equipment problem. The CRP system images the subsurface electrical properties of an estuarine, riverine or lacustrine environment. Resistivity differences can be attributed to subsurface geology (conductive vs less conductive layers) and hydrogeologic conditions with fresh water exhibiting high resistivity and saline conditions showing low resistivity.
2007
In ArcMap 9.2 an ArcMap extension written in Woods Hole (VACExtras, v2.1) was used to convert the individual navigation points to lines. The "Points to Line v2" tool within the extension was used. The user selects an attribute to be the unique identifier used to group the points into a line; in this case, the attribute "linename" was used. The script assumes the order of the points in the point shapefile is the order they need to be added to the line, and the projection of the output shapefile is the same as the input point shapefile. The user can also select additional attributes to be carried over to the output polyline shapefile. The value written out is the first occurrence of the attribute on the unique "line". The additional attributes carried over were gpstime, depth_m, jday, and gpsdate. This process step, along with all subsequent process steps, was performed by the same person: VeeAnn A. Cross.
resgpspnts_jd136.shp
200911
resgpslns_jd136.shp
VeeAnn A. Cross
U.S. Geological Survey
Marine Geologist
mailing and physical address
Woods Hole Coastal and Marine Science Center
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
(508) 548-8700 x2251
(508) 457-2310
vatnipp@usgs.gov
In ArcMap 9.2, XTools Pro (v. 5.2) was used to add the line length attribute "len_utm18". In XToolsPro - Table Operations - Calculate Area, Perimeter, Length, Acres and Hectares. Specified the output projection as NAD_1983_UTM_Zone_18N and set the output units as meters. Set the output field name to len_utm18.
resgpslns_jd136.shp
201004
resgpslns_jd136.shp
Two text attributes were added to the attribute table in ArcMap 9.2. The attribute "hotlink" will allow the user to hyperlink to the MATLAB JPEG images of the CRP line from within ArcMap. The attribute "hlink2" will allow the user to hyperlink to the EarthImager JPEG image of the long version of the CRP line from within ArcMap. See the entity and attribute overview for instructions on how to implement this feature. The links to L24F1, L24F2, L25F1, L26F1, L27F1_part1, L27F1_part2 and L28F1 profile data point to the modified files in which additional bathymetry data was used to supplement the missing bathymetry from the originally acquired CRP lines.
resgpslns_jd136.shp
201006
resgpslns_jd136.shp
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. Reordered the links in the identification section to have a landing page link as the first link. Updated the link to the field activity. Moved the minimal source information provided to make it the first process step. 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.
20171018
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
Vector
String
25
0.000001
0.000001
Decimal degrees
North American Datum of 1983
Geodetic Reference System 80
6378137.000000
298.257222
Local surface
0.1
meters
Explicit depth coordinate included with horizontal coordinates
resgpslns_jd136
ESRI polyline shapefile
ESRI
FID
Internal feature number.
ESRI
Sequential unique whole numbers that are automatically generated.
Shape
Feature geometry.
ESRI
Coordinates defining the features.
Id
An automatically generated numeric value.
VACExtras v2.1
0
0
line
The alphanumeric name corresponding to the prefix of the GPS filename. This name reflects the name assigned to the line of data acquisition and incorporates modifiers to reflect modification of the GPS file if the GPS file was split into more than one part.
U.S. Geological Survey
Character set.
gpstime
GPS time in the format HHMMSS. GPS time is +4 from local time during the survey.
U.S. Geological Survey
Although the value is represented as a number, the number as a whole doesn't have a particular meaning. Only when the individual parts for hours, minutes, and seconds are broken out does the number have meaning.
depth_m
First occurence of the depth of the water below the fathometer in meters recorded by the ship's fathometer/navigation system. Datum is local surface (no tides taken into account). A value of -9999 indicates no data.
U.S. Geological Survey
0.4
2.9
meters
jday
This number represents the Julian day of data collection based on the GPS day. Julian day is the integer number representing the interval of time in days since January 1 of the year.
U.S. Geological Survey
136
136
days
gpsdate
The date recorded in the GPS navigation in the format DDMMYY. Because of the time offset from local time, this date could actually be different than the local acquisition date.
U.S. Geological Survey
Character set.
len_utm18
The length of the polyline in meters (based on UTM, Zone 18, NAD83 projection).
Calculated by XToolsPro version 5.2.
110.710733
3942.922297
meters
hotlink
Text field which provides the partial path and full filename of the MATLAB JPEG image of the CRP line associated with the trackline.
Data processor.
Character set.
hlink2
Text field which provides the partial path and full filename of the long JPEG image of the CRP line associated with the trackline.
Data processor.
Character set.
In order to effectively utilize the "hotlink" or "hlink2" attribute in ArcGIS, the user must follow a couple of steps. First, the user must open the Layer Properties of the shapefile within ArcMap - select the Display tab - and click on the check box next to "Support Hyperlinks using field:" and the field selected from the dropdown menu needs to be "hotlink" or "hlink2". The hyperlink is set to a document. Additionally, a hyperlink base must be supplied in the ArcMap document (mxd) to complete the full path to the images. This is accomplished from File - Document Properties. On the Summary tab there is a section for "Hyperlink base". The text supplied here needs to be the disk information preceding "data" in the full path to the image. If the data are being read from a DVD, this would be the drive letter such as F:\.
U.S. Geological Survey
VeeAnn A. Cross
U.S. Geological Survey
Marine Geologist
mailing and physical address
Woods Hole Coastal and Marine Science Center
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
(508) 548-8700 x2251
(508) 457-2310
vatnipp@usgs.gov
Downloadable Data
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 9.2
This WinZip (version 9.0) file contains the polyline shapefile as well as the associated metadata files.
0.0640
https://pubs.usgs.gov/of/2010/1094/html/catalog.html
https://pubs.usgs.gov/of/2010/1094/data/navigation/resgpslns_jd136.zip
DVD-ROM
4.75
GBytes
UDF
none
This WinZip file contains data available in ESRI polyline shapefile format. The user must have software capable of uncompressing the WinZip file and reading/displaying the shapefile.
20240318
VeeAnn A. Cross
U.S. Geological Survey
Marine Geologist
mailing and physical address
Woods Hole Coastal and Marine Science Center
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
(508) 548-8700 x2251
(508) 457-2310
whsc_data_contact@usgs.gov
The metadata contact email address is a generic address in the event the person is no longer with USGS. (updated on 20240318)
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
local time