RESGPSLNS_JD137.SHP: Ship Trackline along which Continuous Resistivity Profile Data were Collected in the Corsica River Estuary, Maryland on May 17, 2007 on USGS Cruise 07005

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: John F. Bratton

Originator: VeeAnn A. Cross

Publication_Date: 2011

Title:

RESGPSLNS_JD137.SHP: Ship Trackline along which Continuous Resistivity Profile Data were Collected in the Corsica River Estuary, Maryland on May 17, 2007 on USGS Cruise 07005

Geospatial_Data_Presentation_Form: vector digital data

Series_Information:

Series_Name: Open-File Report

Issue_Identification: 2010-1094

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:

<https://pubs.usgs.gov/of/2010/1094/data/navigation/resgpslns_jd137.zip>

Online_Linkage: <https://pubs.usgs.gov/of/2010/1094/html/catalog.html>

Larger_Work_Citation:

Citation_Information:

Originator: VeeAnn A. Cross

Originator: John F. Bratton

Originator: Charles R. Worley

Originator: John Crusius

Originator: Kevin D. Kroeger

Publication_Date: 2011

Title:

Continuous resistivity profiling data from the Corsica River Estuary, Maryland

Series_Information:

Series_Name: Open-File Report

Issue_Identification: 2010-1094

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: <https://pubs.usgs.gov/of/2010/1094/>

Description:

Abstract:

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: <http://quashnet.er.usgs.gov/data/2007/07005/>

Purpose:

The purpose of this polyline shapefile is to indicate the ship's position during the continuous resistivity profile survey on May 17, 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.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 20070517

Currentness_Reference: ground condition

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -76.149917

East_Bounding_Coordinate: -76.108067

North_Bounding_Coordinate: 39.086267

South_Bounding_Coordinate: 39.074783

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 Serial Number 07005

Theme_Keyword: Field Activity Number 2007-005-FA

Theme_Keyword: Info Bank ID T-1-07-CH

Theme_Keyword: navigation

Theme_Keyword: polyline

Theme_Keyword: shapefile

Theme_Keyword: Continuous Resistivity Profiling

Theme_Keyword: CRP

Theme_Keyword: Lowrance GPS

Theme_Keyword: R/V Terrapin

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category

Theme_Keyword: inlandWaters

Theme_Keyword: location

Theme_Keyword: oceans

Theme_Keyword: oceans and estuaries

Theme_Keyword: oceans and coastal

Theme_Keyword: elevation

Place:

Place_Keyword_Thesaurus: General

Place_Keyword: North America

Place_Keyword: North Atlantic

Place_Keyword: United States

Place_Keyword: Maryland

Place_Keyword: Corsica River Estuary

Place_Keyword: Chesapeake Bay

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: John F. Bratton

Contact_Organization: U.S. Geological Survey

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 x2254

Contact_Facsimile_Telephone: (508) 457-2310

Contact_Electronic_Mail_Address: jbratton@usgs.gov

Contact_Instructions:

Current address: NOAA/GLERL 4840 S. State Rd. Ann Arbor MI 48108-9719 734-741-2235 John.Bratton@noaa.gov

Browse_Graphic:

Browse_Graphic_File_Name:

<https://pubs.usgs.gov/of/2010/1094/data/navigation/resgpslns_jd137.gif>

Browse_Graphic_File_Description:

Thumbnail image showing the location of resistivity tracklines collected May 17, 2007. The coastline is included for spatial reference.

Browse_Graphic_File_Type: GIF

Native_Data_Set_Environment:

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.2.6.1500

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. These lines represent all the survey lines from this day.

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 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.

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 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.

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 ¼ 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.

Process_Step:

Process_Description:

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.

Source_Used_Citation_Abbreviation: resgpspnts_jd137.shp

Process_Date: 200911

Source_Produced_Citation_Abbreviation: resgpslns_jd137.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:

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.

Source_Used_Citation_Abbreviation: resgpslns_jd137.shp

Process_Date: 201004

Source_Produced_Citation_Abbreviation: resgpslns_jd137.shp

Process_Step:

Process_Description:

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.

Source_Used_Citation_Abbreviation: resgpslns_jd137.shp

Process_Date: 201006

Source_Produced_Citation_Abbreviation: resgpslns_jd137.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: 45

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: North American Datum of 1983

Ellipsoid_Name: Geodetic Reference System 80

Semi-major_Axis: 6378137.000000

Denominator_of_Flattening_Ratio: 298.257222

Vertical_Coordinate_System_Definition:

Depth_System_Definition:

Depth_Datum_Name: Local surface

Depth_Resolution: 0.1

Depth_Distance_Units: meters

Depth_Encoding_Method: Explicit depth coordinate included with horizontal coordinates

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: resgpslns_jd137

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: An automatically generated numeric value.

Attribute_Definition_Source: VACExtras v2.1

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 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 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: depth_m

Attribute_Definition:

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.

Attribute_Definition_Source: U.S. Geological Survey

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.6

Range_Domain_Maximum: 4.6

Attribute_Units_of_Measure: meters

Attribute:

Attribute_Label: jday

Attribute_Definition:

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.

Attribute_Definition_Source: U.S. Geological Survey

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 137

Range_Domain_Maximum: 137

Attribute_Units_of_Measure: days

Attribute:

Attribute_Label: gpsdate

Attribute_Definition:

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.

Attribute_Definition_Source: U.S. Geological Survey

Attribute_Domain_Values:

Unrepresentable_Domain: Character set.

Attribute:

Attribute_Label: len_utm18

Attribute_Definition:

The length of the polyline in meters (based on UTM, Zone 18, NAD83 projection).

Attribute_Definition_Source: Calculated by XToolsPro version 5.2.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 122.440337

Range_Domain_Maximum: 1381.243954

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.

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.

Attribute_Definition_Source: Data processor.

Attribute_Domain_Values:

Unrepresentable_Domain: Character set.

Overview_Description:

Entity_and_Attribute_Overview:

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:\.

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: WinZip

Format_Version_Number: 9.0

Format_Information_Content:

This WinZip file contains the polyline shapefile as well as the associated metadata files.

Transfer_Size: 0.060 MB

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: <https://pubs.usgs.gov/of/2010/1094/html/catalog.html>

Network_Resource_Name:

<https://pubs.usgs.gov/of/2010/1094/data/navigation/resgpslns_jd137.zip>

Offline_Option:

Offline_Media: DVD-ROM

Recording_Capacity:

Recording_Density: 4.75

Recording_Density_Units: GBytes

Recording_Format: UDF

Fees: none

Technical_Prerequisites:

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.

Metadata_Reference_Information:

Metadata_Date: 20110307

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