Identification_Information: Citation: Citation_Information: Originator: John F. Bratton Originator: VeeAnn A. Cross Publication_Date: 2005 Title: Continuous Resistivity Profile Tracklines of Data Collected in 2004 in the Neuse River, North Carolina Geospatial_Data_Presentation_Form: vector digital data Online_Linkage: http://pubs.usgs.gov/of/2005/1306/data/navigation/restracklines_04.zip Larger_Work_Citation: Citation_Information: Originator: VeeAnn A. Cross Originator: John F. Bratton Originator: Emile Bergeron Originator: Jeff K. Meunier Originator: John Crusius Originator: Dirk Koopmans Publication_Date: 2005 Title: Continuous Resistivity Profiling Data from the Upper Neuse River Estuary, North Carolina, 2004-2005 Series_Information: Series_Name: Open-File Report Issue_Identification: 2005-1306 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/2005/1306 Description: Abstract: The Neuse River Estuary in North Carolina is a broad, V-shaped water body located on the southwestern end of Pamlico Sound. This estuary suffers from severe eutrophication for which several water quality models have recently been developed to aid in the management of nutrient loading to the estuary. In an effort to help constrain model estimates of the fraction of nutrients delivered by direct ground-water discharge, continuous resistivity profile (CRP) measurements were made during the spring of 2004 and 2005. CRP is used to measure electrical resistivity of sediments, a property that is sensitive to difference in salinity of submarine ground water. The 2004 and 2005 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. CRP data enables the mapping of the extent and depth of the fresher ground water within the estuary. Purpose: This shapefile is provided to show the tracklines were continuous resistivity profile data were collected. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20040419 Ending_Date: 20040423 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -76.984117 East_Bounding_Coordinate: -76.713317 North_Bounding_Coordinate: 35.055067 South_Bounding_Coordinate: 34.938517 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: marine resistivity Theme_Keyword: navigation Theme_Keyword: OF 2005-1306 Theme_Keyword: Open-File Report Theme_Keyword: polyline Theme_Keyword: shapefile Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Woods Hole Science Center Theme_Keyword: trackline Place: Place_Keyword_Thesaurus: General Place_Keyword: Neuse River Place_Keyword: North America Place_Keyword: North Carolina Place_Keyword: Pamlico Sound Place_Keyword: United States 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: 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 Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535 Data_Quality_Information: 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. Process_Step: Process_Description: The GPS files were processed using an AWK script to parse out the navigational information from the $GPRMC string and concatenated into a single file. Source_Used_Citation_Abbreviation: *.gps Source_Produced_Citation_Abbreviation: allgps.txt Process_Step: Process_Description: This comma delimited text file was then imported as a table into ArcView 3.3. Source_Used_Citation_Abbreviation: allgps.txt Process_Step: Process_Description: The table was then added as an event theme into ArcView. Process_Step: Process_Description: An avenue script (pnts2lines.ave) was run that converted the event theme to a polyline shapefile. The unique attribute "Linename" was used to generate a separate record for each individual acquisition line. Source_Produced_Citation_Abbreviation: allgps_lns.shp Process_Step: Process_Description: Lines for which there was no valid resistivity data were deleted. Process_Step: Process_Description: The shapefile was loaded into ArcMap v9.0 and resistivity lines that were split for processing purposes were split with the editor based on distance along line. This was done so that a direct correlation between processed line JPEG image and navigation position could be determined. Source_Used_Citation_Abbreviation: allgps_lns.shp Source_Produced_Citation_Abbreviation: restracklines_04.shp Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 23 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 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257222 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: restracklines_04 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: Attribute_Label: LINENAME Attribute_Definition: Prefix of the filename used during data acquisition. Attribute_Definition_Source: Technician. Attribute_Domain_Values: Unrepresentable_Domain: character set Attribute: Attribute_Label: GPSTIME Attribute_Definition: GPS time for the start of the trackline. Attribute_Definition_Source: Data processor. Attribute_Domain_Values: Range_Domain: Attribute_Units_of_Measure: Time in hr:min:sec Attribute: Attribute_Label: DATESTR Attribute_Definition: A numeric string representing the date the data was acquired as recorded by the GPS. Attribute_Definition_Source: Data processor. Attribute_Domain_Values: Unrepresentable_Domain: numeric set representing the data in the form ddmmyr Attribute: Attribute_Label: LENGTH Attribute_Definition: Length in meters of the complete trackline based on UTM, Zone18, NAD83 projection. Attribute_Definition_Source: Computer calculated. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 666.349 Range_Domain_Maximum: 43483.078 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: SPLITPART Attribute_Definition: Prefix filename assigned to the datafile if the STG file was split. This value is the same as Linename if no split occurred. 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 Resource_Description: Downloadable Data Distribution_Liability: These data were prepared by an agency of the United States Government. Neither the United States government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States government or any agency thereof. Although all data published in this report have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials and/or the functioning of the software. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of this data, software, or related materials. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Transfer_Size: 0.135 Metadata_Reference_Information: Metadata_Date: 20050901 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