Trimmed Processed Continuous Resistivity Point Data from Cape Cod National Seashore, May 17-20, 2004

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: John F. Bratton
Publication_Date: 2008
Title:
Trimmed Processed Continuous Resistivity Point Data from Cape Cod National Seashore, May 17-20, 2004
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2006-1169
Publication_Information:
Publication_Place: Woods Hole Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Online_Linkage:
<http://pubs.usgs.gov/of/2006/1169/data/gis/resistivity/mrg2004_trimxyz.zip>
Online_Linkage: <http://pubs.usgs.gov/of/2006/1169/htmldocs/catalog.htm>
Larger_Work_Citation:
Citation_Information:
Originator: VeeAnn A. Cross
Originator: John F. Bratton
Originator: John Crusius
Originator: John A. Colman
Originator: Timothy D. McCobb
Publication_Date: 2008
Title: Submarine Hydrogeological Data from Cape Cod National Seashore
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2006-1169
Publication_Information:
Publication_Place: Woods Hole Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Online_Linkage: <http://pubs.usgs.gov/of/2006/1169/>
Description:
Abstract:
Continuous resistivity profiling (CRP) surveys were conducted at Cape Cod National Seashore in 2004 and 2006 in order to test hypotheses about groundwater flow under and into estuaries and the Atlantic Ocean. Coastal resource managers here and elsewhere are concerned about nutrients that are entering coastal waters via submarine groundwater discharge, which are contributing to eutrophication and harmful algal blooms. CRP is used to measure electrical resistivity of sediments, a property that is sensitive to differences in salinity of submarine ground water. The 2004 and 2006 surveys used floating resistivity streamers of 100 m and 50 m respectively. The depth penetration of the streamers is approximately 20% of the streamer length which translates to approximately 20-25 m with the 100 m streamer and 12-14 m with the 50 m streamer. These data were processed using AGI's EarthImager 2D software.
Purpose:
To provide processed resistivity data as a point shapefile. This version has removed all the data points that fall above the sediment/water interface.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20040517
Ending_Date: 20040520
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -70.036194
East_Bounding_Coordinate: -69.919618
North_Bounding_Coordinate: 42.022037
South_Bounding_Coordinate: 41.669400
Keywords:
Theme:
Theme_Keyword_Thesaurus: General
Theme_Keyword: CMGP
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: Continuous Resistivity Profiling
Theme_Keyword: CRP
Theme_Keyword: ground-water
Theme_Keyword: navigation
Theme_Keyword: OF 2006-1169
Theme_Keyword: Open-File Report
Theme_Keyword: point
Theme_Keyword: shapefile
Theme_Keyword: submarine ground-water
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Woods Hole Science Center
Theme_Keyword: WHSC field activity serial number 04014
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: environment
Theme_Keyword: geoscientificInformation
Theme_Keyword: inlandWaters
Theme_Keyword: location
Theme_Keyword: oceans
Place:
Place_Keyword_Thesaurus: General
Place_Keyword: Atlantic Ocean
Place_Keyword: Cape Cod
Place_Keyword: Massachusetts
Place_Keyword: North America
Place_Keyword: United States
Place_Keyword: Pleasant Bay
Place_Keyword: Salt Pond
Place_Keyword: Nauset Marsh
Place_Keyword: Cape Cod National Seashore
Access_Constraints: None.
Use_Constraints:
The U.S. Geological Survey must be referenced as the originator of the dataset in any future products or research derived from these data.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: John F. Bratton
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: 508-548-8700 x2254
Contact_Facsimile_Telephone: 508-457-2210
Contact_Electronic_Mail_Address: jbratton@usgs.gov
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.780
Data_Quality_Information:
Logical_Consistency_Report:
No additional checks for topological consistency other than visual inspection were performed on the data.
Completeness_Report:
Only those lines with valid resistivity data are represented here.
Lineage:
Source_Information:
Source_Contribution:
These data were acquired with an AGI SuperSting Marine system that is described at the website: www.agiusa.com/marinesystem.shtml. The particular system used for this acquisition was an 11 stainless steel electrode array with electrodes spaced 10 meters apart. A dipole-dipole configuration was used for the data collection in which two fixed current electrodes are assigned with the measurement of voltage potentials between electrode pairs in the remaining electrodes. Each line of data acquisition records several files. The two files necessary for processing are the *.stg and *.gps file. The STG file contains the resistivity data, while the GPS file contains the navigation information. Bathymetry point data was collected with a separate system and logged as text files.
Process_Step:
Process_Description:
The data were transferred from the logging computer via AGISSAdmin software.
Process_Date: 2004
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: John F. Bratton
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2254
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: jbratton@usgs.gov
Process_Step:
Process_Description:
The bathymetry text files needed to be merged with the GPS navigation files. The logging of the navigation files started at the same time as the logging of the resistivity files. Although the bathymetry data contains no time stamps, the assumption was made that the time span was the same as the navigation file. The bathymetry data was acquired in feet at a faster rate than the navigation data. An awk script was written to convert the bathymetry data to meters, pull the appropriate bathymetry point to match up with the navigation point, and output the format as SDDBT (the format that EarthImager expects). The points to pull was based on the assumption that the time span of navigation and bathymetry was the same, so took the total number of bathymetry points and divided it by the number of navigational fixes, and pulled the bathymetry point at that increment. Another awk script was written to merge the navigation data and bathymetry data into a single file.
Process_Date: 2004
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn A. Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2251
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Process_Step:
Process_Description:
$GPRMC lines with the GPS file that had bad time stamps or were otherwise corrupt were deleted.
Process_Date: 2004
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn A. Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2251
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Process_Step:
Process_Description:
The resistivity data were merged with the navigation data and linearized using AGI's Marine Log Manager software. (Note that the Marine Log Manager version is different than the software version of the AGISSAdmin software of which it is a part - although shipped together, the software is developed separately). In some instances, only a portion of the line was exported for processing. In particular, turns are removed before processing.
Process_Date: 2004
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn A. Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2251
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Process_Step:
Process_Description:
The file was then exported to a new STG file, and accompanying DEP file. The DEP file contains the distance along line and bathymetry values.
Process_Date: 2004
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn A. Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2251
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Process_Step:
Process_Description:
The DEP file was checked for anomalous bathymetry values, or duplicated distance along values, and those lines in the file were deleted.
Process_Date: 2004
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn A. Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2251
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Process_Step:
Process_Description:
EarthImager software does not require that a default resistivity value for the water column be supplied in the DEP file. If one is not supplied, then it calculates a value based on the first electrode pair. No instrument was available to measure the water resistivity, so this value was left blank.
Process_Date: 2004
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn A. Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2251
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Process_Step:
Process_Description:
EarthImager version 1.7.8 was used to process the data files. The *.ini file accompanying the results contains the parameters used during the processing. These parameters include: minimum voltage: 0.02; minimum abs(V/I): 2E-5; max repeat error: 3%; min apparent res: 0.03; max apparent res: 1000; max reciprocal error: 5%; remove spikes, robust model inversion; finite difference method; Cholesky decomposition; Dirichlet boundary condition; thickness incremental factor: 1.1; depth factor: 1.1; number of iterations: 8; stop criteria: max RMS 3%; error reduction 6%; L2Norm; CRP processing using a 65% overlap
Process_Date: 2004
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn A. Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2251
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Process_Step:
Process_Description:
The results of the processing are JPEG images of the resistivity profile (a short and extended version), and an XYZ file containing the distance along, depth, apparent resistivity (ohm-m). The JPEG files produced use a color scale that is based on the data from that particular file.
Process_Date: 2004
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn A. Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2251
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Process_Step:
Process_Description:
The XYZ output file was loaded into Matlab with the DEP file so that those resistivity values in the water column could be removed. The extrapolated value at the sediment water interface was exported, as well as all the values in the original XYZ file below the DEP line. These new XYZ files are the "trimmed" xyz files.
Process_Date: 2004
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn A. Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2251
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Process_Step:
Process_Description:
An ArcView 3.3 avenue script (createatdistance.ave) was used to read the trimmed XYZ files, and based on the distance along value, extract the geographic X and Y position based on the polyline trackline. The result is a point shapefile containing each line of information in the XYZ file.
Process_Date: 2004
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn A. Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2251
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Process_Step:
Process_Description:
Each individual trimmed XYZ shapefile was merged into a single point shapefile.
Process_Date: 2004
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn A. Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2251
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Entity point
Point_and_Vector_Object_Count: 1323510
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.000000
Longitude_Resolution: 0.000000
Geographic_Coordinate_Units: Decimal degrees
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1927
Ellipsoid_Name: Clarke 1866
Semi-major_Axis: 6378206.400000
Denominator_of_Flattening_Ratio: 294.978698
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: mrg2004_trimxyz
Attribute:
Attribute_Label: FID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: ID
Attribute_Definition: Software generated identification number.
Attribute_Definition_Source: Software.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 129926
Attribute:
Attribute_Label: DIST
Attribute_Definition: Distance along line (in meters) that the data point occurs.
Attribute_Definition_Source: Processing software calculated.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.1
Range_Domain_Maximum: 11471.5
Attribute:
Attribute_Label: DEPTH
Attribute_Definition:
Depth from water surface (in meters) where the data point occurs. (Negative value indicates below the water surface)
Attribute_Definition_Source: Processing software generated.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -28.060
Range_Domain_Maximum: -0.3900
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: RESVALUE
Attribute_Definition: Resistivity value of the data point.
Attribute_Definition_Source: Processing software calculated.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.1
Range_Domain_Maximum: 1000
Attribute_Units_of_Measure: ohm-meters
Attribute:
Attribute_Label: LONGITUDE
Attribute_Definition: Longitude position of the data point.
Attribute_Definition_Source: Software calculated.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -70.036194
Range_Domain_Maximum: -69.919618
Attribute_Units_of_Measure: decimal degrees
Attribute:
Attribute_Label: LATITUDE
Attribute_Definition: Latitude position of the data point.
Attribute_Definition_Source: Software calculated.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 41.669400
Range_Domain_Maximum: 42.022037
Attribute_Units_of_Measure: decimal degrees
Attribute:
Attribute_Label: UTMX
Attribute_Definition: UTM easting, based on UTM Zone 19, position of the data point.
Attribute_Definition_Source: Software calculated.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 414214.0
Range_Domain_Maximum: 423458.5
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: UTMY
Attribute_Definition: UTM northing, based on UTM Zone 19, position of the data point.
Attribute_Definition_Source: Software calculated.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 4613497.9
Range_Domain_Maximum: 4652742.3
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: LINE
Attribute_Definition: Resistivity data collection line where the data point is from.
Attribute_Definition_Source: Data processor.
Attribute_Domain_Values:
Unrepresentable_Domain: character set
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: John F. Bratton
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2254
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: jbratton@usgs.gov
Resource_Description: Downloadable Data
Distribution_Liability:
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.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: SHP
File_Decompression_Technique: WinZip
Transfer_Size: 35.342
Fees: None.
Technical_Prerequisites:
These data are available in Environmental Systems Research Institute (ESRI) shapefile format. 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, ArcExplorer, capable of displaying the data is available from ESRI at www.esri.com.
Metadata_Reference_Information:
Metadata_Date: 20080225
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn A. Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2251
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vatnipp@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_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile
Generated by mp version 2.8.6 on Tue Jul 08 11:23:00 2008