JD105GPS_LINES_SPLIT.SHP: Ship tracklines along which continuous resistivity profiling data were collected in the Indian River Bay, Delaware, on April 15, 2010, on U.S. Geological Survey Field Activity 2010-006-FA (Geographic, WGS 84)

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: VeeAnn A. Cross
Publication_Date: 2014
Title:
JD105GPS_LINES_SPLIT.SHP: Ship tracklines along which continuous resistivity profiling data were collected in the Indian River Bay, Delaware, on April 15, 2010, on U.S. Geological Survey Field Activity 2010-006-FA (Geographic, WGS 84)
Edition: 1
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2011-1039
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:
<http://pubs.usgs.gov/of/2011/1039/data/navigation/resistivity/jd105gps_lines_splits.zip>
Online_Linkage:
<http://pubs.usgs.gov/of/2011/1039/html/ofr2011-1039-catalog.html>
Larger_Work_Citation:
Citation_Information:
Originator: V.A. Cross
Originator: J.F. Bratton
Originator: H.A. Michael
Originator: K.D. Kroeger
Originator: A. Green
Originator: E. Bergeron
Publication_Date: 2014
Title:
Continuous Resistivity Profiling and Seismic-Reflection Data Collected in April 2010 from Indian River Bay, Delaware
Edition: 1
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2011-1039
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Online_Linkage: <http://pubs.usgs.gov/of/2011/1039/>
Online_Linkage: <http://dx.doi.org/10.3133/ofr20111039>
Description:
Abstract:
A geophysical survey to delineate the fresh-saline groundwater interface and associated sub-bottom sedimentary structures beneath Indian River Bay, Delaware, was carried out in April 2010. This included surveying at higher spatial resolution in the vicinity of a study site at Holts Landing, where intensive onshore and offshore studies were subsequently completed. The total length of continuous resistivity profiling (CRP) survey lines was 145 kilometers (km), with 36 km of chirp seismic lines surveyed around the perimeter of the bay. Medium-resolution CRP surveying was performed using a 50-meter streamer in a bay-wide grid. Results of the surveying and data inversion showed the presence of many buried paleochannels beneath Indian River Bay that generally extended perpendicular from the shoreline in areas of modern tributaries, tidal creeks, and marshes. An especially wide and deep paleochannel system was imaged in the southeastern part of the bay near White Creek. Many paleochannels also had high-resistivity anomalies corresponding to low-salinity groundwater plumes associated with them, likely due to the presence of fine-grained estuarine mud and peats in the channel fills that act as submarine confining units. Where present, these units allow plumes of low-salinity groundwater that was recharged onshore to move beyond the shoreline, creating a complex fresh-saline groundwater interface in the subsurface. The properties of this interface are important considerations in construction of accurate coastal groundwater flow models. These models are required to help predict how nutrient-rich groundwater, recharged in agricultural watersheds such as this one, makes its way into coastal bays and impacts surface water quality and estuarine ecosystems. For more information on the survey conducted for this project, see <http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2010-006-FA>.
Purpose:
The purpose of this polyline shapefile is to indicate the ship's position during the continuous resistivity profile survey in the Indian River Bay on April 15, 2010. 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.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20100415
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -75.190433
East_Bounding_Coordinate: -75.076000
North_Bounding_Coordinate: 38.620000
South_Bounding_Coordinate: 38.576217
Keywords:
Theme:
Theme_Keyword_Thesaurus: General
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: CMGP
Theme_Keyword: Woods Hole Coastal and Marine Science Center
Theme_Keyword: WHCMSC
Theme_Keyword: Field Activity Number 2010-006-FA
Theme_Keyword: Info Bank ID K-6-10-DL
Theme_Keyword: navigation
Theme_Keyword: polyline
Theme_Keyword: shapefile
Theme_Keyword: Continuous Resistivity Profiling
Theme_Keyword: CRP
Theme_Keyword: R/V Knob
Theme_Keyword: Lowrance GPS
Theme_Keyword: trackline
Theme_Keyword: Open-file Report 2011-1039
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: location
Theme_Keyword: oceans
Theme_Keyword: oceans and estuaries
Theme_Keyword: oceans and coastal
Place:
Place_Keyword_Thesaurus: General
Place_Keyword: North America
Place_Keyword: North Atlantic Ocean
Place_Keyword: United States
Place_Keyword: Delaware
Place_Keyword: Indian River Bay
Place_Keyword: Indian River Inlet
Place_Keyword: Holts Landing
Place_Keyword: Piney Neck
Place_Keyword: Sussex County
Place_Keyword: Rosedale Beach
Access_Constraints: None.
Use_Constraints:
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.
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: Woods Hole Coastal and Marine Science Center
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
Browse_Graphic:
Browse_Graphic_File_Name:
<http://pubs.usgs.gov/of/2011/1039/data/navigation/resistivity/jd105gps_lines_splits.gif>
Browse_Graphic_File_Description:
Thumbnail image showing hte location of resistivity tracklines collected April 15, 2010. The coastline is included for spatial reference.
Browse_Graphic_File_Type: GIF
Native_Data_Set_Environment:
Microsoft Windows Vista Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 9.3.1.4095
Data_Quality_Information:
Logical_Consistency_Report: Each line was generated in the same manner.
Completeness_Report:
All the points in the input shapefile were used to generate these polylines.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The navigation system used was a Lowrance 480M with an LGC-2000 Global Positioning System (GPS) antenna. The antenna was located directly above the fathometer transducer mount point, and approximately 2 meters starboard of the mount point of the towed continuous resistivity profile streamer. GPS data are assumed to be accurate within 10 meters on this survey.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
All collected bathymetry values were collected by the 200 kHz Lowrance fathometer. The fathometer was mounted starboard side, directly below the GPS antenna. The Lowrance manufacturer indicates the speed of sound used by the system to convert to depths is 4800 feet/second. The depth values are not corrected for the approximately 0.5 m transducer draft. All values are assumed to be accurate to within 1 meter.
Lineage:
Source_Information:
Source_Contribution:
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 1/4 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 antenna and fathometer transducer were mounted on the starboard side of the boat. The streamer tow point was on the port side aft. The layback offset between the navigation antenna and the first electrode was 17.6 meters on April 13 and 14. On April 15 the antenna and transducer were moved 1.6 m aft changing the layback offset to 16 m. This layback offset is accounted for by the acquisition system. The approximately 2 m lateral offset is not accounted for. The Lowrance 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.
Process_Step:
Process_Description:
In ArcMap 9.2 an ArcMap extension written in Woods Hole (VACExtras v. 2.1) 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 "line" 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 - first occurrence and last occurrence. The first occurrence values written to the output shapefile were gpstime, gpsdate, and bestdepth. The output attributes retain the same name. The last occurrence attributes carried to the output shapefile were gpstime, gpsdate, and bestdepth. The attributes in the output shapefile have "_end" appended to the attribute name. If the original attribute name is more than 6 characters long, the attribute name is truncated to the first 6 characters with the "_end" appended to that. This process step, along with all subsequent process steps, was performed by the same person: VeeAnn A. Cross.
Source_Used_Citation_Abbreviation: jd105gps_bestdepth.shp
Process_Date: 201102
Source_Produced_Citation_Abbreviation: jd105gps_lines.shp
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: Woods Hole Coastal and Marine Science Center
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:
During processing of the data, one had to be split during processing to account for sharp turns during the survey - L36F1. A definition query was applied to jd105gps_bestdepth.shp such that only the points associated with each line are viewable. Then VACExtras v. 2.1 - Points 2 Lines v2 was used to generate a polyline shapefile as in the previous process step. The definition query and VACExtras were applied a total of two times - for each individual part. Within the newly generated polyline shapefiles, the "line" attribute was edited to reflect the new linename.
Source_Used_Citation_Abbreviation: jd105_bestdepth.shp
Process_Date: 201103
Source_Produced_Citation_Abbreviation: l36f1_a.shp
Source_Produced_Citation_Abbreviation: l36f1_b.shp
Process_Step:
Process_Description:
Using ArcMap 9.2 the original polyline shapefile was merged with the newly formed "split" lines using ArcToolbox - Data Management Tools - General - Merge.
Source_Used_Citation_Abbreviation: jd105gps_lines.shp
Source_Used_Citation_Abbreviation: l36f1_a.shp
Source_Used_Citation_Abbreviation: l36f1_b.shp
Process_Date: 201103
Source_Produced_Citation_Abbreviation: jd105gps_lines_splits.shp
Process_Step:
Process_Description:
Used XTools Pro version 5.2 to add the line length attribute "len_utm18". In XTools Pro - Table Operations - Calculate Area, Perimeter, Length, Acres and Hectares. Specified the output projection as WGS_1984_UTM_18_N and set the output units as meters. Set the output field name to len_utm18.
Source_Used_Citation_Abbreviation: jd105gps_lines_splits.shp
Process_Date: 201103
Source_Produced_Citation_Abbreviation: jd105gps_lines_splits.shp
Process_Step:
Process_Description:
In ArcMap 9.2 two additional attributes were added to the shapefile: hotlink and hlink2. 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. Because of the split in some of the lines, not every polyline has a value in these new attributes.
Source_Used_Citation_Abbreviation: jd105gps_lines_splits.shp
Process_Date: 201103
Source_Produced_Citation_Abbreviation: jd105gps_lines_splits.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: 33
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.000001
Longitude_Resolution: 0.000001
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
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: jd105gps_lines_splits
Entity_Type_Definition: ESRI polyline shapefile
Entity_Type_Definition_Source: ESRI
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:
Attribute automatically generated by the software that converts points to lines.
Attribute_Definition_Source: Software generated.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 0
Attribute:
Attribute_Label: line
Attribute_Definition:
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 (part1, part2) to reflect modification of the GPS file if the GPS file was split into more than one part.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain: Character set.
Attribute:
Attribute_Label: gpstime
Attribute_Definition:
GPS time of the start of the line in the format HHMMSS. GPS time is +4 hours from local time during the survey.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain:
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.
Attribute:
Attribute_Label: gpsdate
Attribute_Definition:
The date recorded in the GPS navigation for the start of the line in the format DDMMYY. Because of the time offset from local time, this date could actually be different than the local acquisition date.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain:
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 month, day, and year are broken out does the number have meaning.
Attribute:
Attribute_Label: bestdepth
Attribute_Definition:
The best available depth of the start of the line in meters based on various calculations and criteria discussed in the process steps for the input point shapefile. This value is not corrected for tides.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.4
Range_Domain_Maximum: 8.3
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: gpstim_end
Attribute_Definition:
GPS time of the end of the line in the format HHMMSS. GPS time is +4 from local time during the survey.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain:
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.
Attribute:
Attribute_Label: gpsdat_end
Attribute_Definition:
The date recorded in the GPS navigation for the end of the line in the format DDMMYY. Because of the time offset from local time, this date could actually be different than the local acquisition date.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain:
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 month, day, and year are broken out does the number have meaning.
Attribute:
Attribute_Label: bestde_end
Attribute_Definition:
The best available depth of the end of the line in meters based on various calculations and criteria discussed in the process steps for the input point shapefile. This value is not corrected for tides.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.361737
Range_Domain_Maximum: 2
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: len_utm18
Attribute_Definition:
Length of the trackline in meters calculated based on UTM, Zone 18, WGS84.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 349.302466
Range_Domain_Maximum: 9698.73136
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: hotlink
Attribute_Definition:
Text field which provides the partial path and full filename of the MATLAB JPEG image of the CRP line associated with the trackline. A blank field indicates no image corresponds to the line either because the line was not processed or the line was split into more than one part.
Attribute_Definition_Source: Data processor.
Attribute_Domain_Values:
Unrepresentable_Domain: Character set.
Attribute:
Attribute_Label: hlink2
Attribute_Definition:
Text field which provides the partial path and full filename of the long JPEG image of the CRP line associated with the trackline. A blank field indicates no image corresponds to the line either because the line was not processed or the line was split into more than one part.
Attribute_Definition_Source: Data processor.
Attribute_Domain_Values:
Unrepresentable_Domain: Character set.
Overview_Description:
Entity_and_Attribute_Overview:
The "line" attribute can have modifiers such as part1. A "part" modifier indicates the original GPS file had to be split, likely due to a large time gap in the original file. For a complete description of the processing on the point shapefile that makes up this polyline (and will explain how the bestdepth value is determined) see the metadata for jd105gps_bestdepth.shp available at <http://pubs.usgs.gov/of/2011/1039/html/ofr2011-1039-catalog.html>. In order to effectively utilize the "hotlink" or "hlink2" attributes 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\.
Distribution_Information:
Distributor:
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: Woods Hole Coastal and Marine Science Center
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
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: Shapefile
Format_Version_Number: ArcGIS 9.2
Format_Information_Content:
This WinZip (v. 14) file contains the polyline shapefile as well as the associated metadata files.
Transfer_Size: 0.11 MB
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
<http://pubs.usgs.gov/of/2011/1039/data/navigation/resistivity/jd105gps_lines_splits.zip>
Network_Resource_Name:
<http://pubs.usgs.gov/of/2011/1039/html/ofr2011-1039-catalog.html>
Network_Resource_Name: <http://dx.doi.org/10.3133/ofr20111039>
Fees: None.
Technical_Prerequisites:
This zip file contains data available in Esri polyline shapefile format. The user must have software capable of uncompressing the zip file and reading/displaying the shapefile.
Metadata_Reference_Information:
Metadata_Date: 20140630
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: Woods Hole Coastal and Marine Science Center
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 2.9.6 on Mon Jun 30 15:48:07 2014