SHOT500SORT_GEOG.SHP: Point Shapefile of 500 Shot Interval Point Navigation For Seismic Data Collected in the Potomac River/Chesapeake Bay from Sept. 6, 2006 to Sept. 8, 2006 on USGS Cruise 06018

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: John F. Bratton
Originator: David S. Foster
Originator: VeeAnn A. Cross
Publication_Date: 2010
Title:
SHOT500SORT_GEOG.SHP: Point Shapefile of 500 Shot Interval Point Navigation For Seismic Data Collected in the Potomac River/Chesapeake Bay from Sept. 6, 2006 to Sept. 8, 2006 on USGS Cruise 06018
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2009-1151
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/2009/1151/data/navigation/seismics/shot500sort_geog.zip>
Online_Linkage: <https://pubs.usgs.gov/of/2009/1151/html/catalog.html>
Larger_Work_Citation:
Citation_Information:
Originator: VeeAnn A. Cross
Originator: David S. Foster
Originator: John F. Bratton
Publication_Date: 2010
Title:
Continuous Resistivity Profiling and Seismic-Reflection Data Collected in 2006 from the Potomac River Estuary, Virginia and Maryland
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2009-1151
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/2009/1151/>
Description:
Abstract:
In order to test hypotheses about groundwater flow under and into Chesapeake Bay, geophysical surveys were conducted by U.S. Geological Survey (USGS) scientists on Chesapeake Bay and the Potomac River Estuary in September 2006. Chesapeake Bay resource managers are concerned about nutrients that are entering the estuary via submarine groundwater discharge, which are contributing to eutrophication. The USGS has performed many related studies in recent years to provide managers with information necessary to make informed decisions about this issue. The research carried out as part of the study described here was designed to help refine nutrient budgets for Chesapeake Bay by characterizing submarine groundwater flow and discharge of groundwater beneath part of the mainstem and a major tributary, the Potomac River Estuary.
Purpose:
The purpose of this layer is to provide all of the 500 shot point navigation associated with the seismic-reflection profiles collected on USGS cruise 06018. This information can help spatially correlate the seismic-reflection profiles with other features and data in the GIS.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20060906
Ending_Date: 20060908
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -76.856460
East_Bounding_Coordinate: -76.310250
North_Bounding_Coordinate: 38.295665
South_Bounding_Coordinate: 37.946077
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 06018
Theme_Keyword: Info Bank ID K-1-06-CH
Theme_Keyword: R/V Kerhin
Theme_Keyword: seismic-reflection navigation
Theme_Keyword: shot point navigation
Theme_Keyword: point shapefile
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
Place:
Place_Keyword_Thesaurus: General
Place_Keyword: North America
Place_Keyword: North Atlantic
Place_Keyword: United States
Place_Keyword: Virginia
Place_Keyword: Potomac River Estuary
Place_Keyword: Chesapeake Bay
Place_Keyword: Dennis Point Marina
Place_Keyword: Solomons, Maryland
Place_Keyword: Maryland
Place_Keyword: Patuxent River
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
Browse_Graphic:
Browse_Graphic_File_Name:
<https://pubs.usgs.gov/of/2009/1151/data/navigation/seismics/shot500sort_geog.gif>
Browse_Graphic_File_Description:
Thumbnail image showing the location of the 500 shot interval seismic navigation collected from Sept. 6-8, 2006. 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:
These points were visually checked to make sure they were viable fixes.
Completeness_Report:
This shapefile represents the 500 shot interval navigation for all the seismic lines collected on this cruise.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
A differential global positioning system (DGPS) was used for the seismic-reflection data. This system was an Ashtech DGPS2 with the navigation being recorded by HYPACK navigation software. The offset from the seismic transducer to the DGPS antenna was 2 meters. This offset was not entered into the software.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Although bathymetry was not recorded directly, bathymetry can be derived by tracing the seafloor reflector in the seismic-reflection profiles. The seismic transducers were mounted on an over the side mount on the port side of the ship. The transducer draft was 0.7 m below the water surface. The draft offset was not included in the data acquisition.
Lineage:
Source_Information:
Source_Contribution:
The seismic acquisition system used on this cruise was a Knudsen Engineering Limited (KEL)1600 USB system. The system has up to 1.2 kW power and is tuned to work with two Massa 3.5 kHz transducers. The transducers were mounted on an over-the-side mount on the port side of the ship. The transducer draft was 0.7 m below the water surface. This draft offset was not included in the data acquisition. The seismic data acquisition software was SounderSuite-USB Beta. This system failed to acquire navigation data from the DGPS NEMA string on the first two days (Julian day 149 and 150). The software was also not able to record data in SEG-Y standard format. KEL KEB format files were logged to disk. In addition, KEA ASCII files with shot (ping) numbers and times were saved to disk. Shot point navigation was also absent in the KEA files on Julian days 149 and 150. On Julian day 151 a patched version of SounderSuite was received and installed. This version recorded navigation in the KEB and KEA files. SEG-Y recording was still not an option. A time server was used to synchronize the DGPS time on the KEL and HYPACK navigation systems. This was important as KEL SounderSuite records system time. Data were acquired at a 20 micro-second sample interval, 2048 samples for a 40 ms record length. Fire-rate was 0.20 seconds (or 5 shots per second). The KEL SounderSuite software was set up to automatically switch files at shot 20,000. Line 5 switched from file 0005_2006_249_2014_002.keb after shot 13509 to a new file (0005_2006_249_2014_003.keb) while changing display parameters, due to a bug in the acquisition software.
Process_Step:
Process_Description:
An ArcView 3.3 avenue script written in Woods Hole (point2line.ave) was used to connect the individual shot points using the attribute "linename" as the unique line identifier. That attribute is also brought over to the resulting polyline shapefile. This process step, as well as all subsequent process steps, were performed by the same person - VeeAnn A. Cross.
Source_Used_Citation_Abbreviation: allshots.shp
Process_Date: 2006
Source_Produced_Citation_Abbreviation: allshots_lns.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:
Using ArcMap 9.0 - ArcToolbox - Data Management Tools - Define Projection the polyline shapefile projection was defined as UTM, zone 18, NAD83.
Source_Used_Citation_Abbreviation: allshots_lns.shp
Process_Date: 2006
Source_Produced_Citation_Abbreviation: allshots_lns.shp
Process_Step:
Process_Description:
The polyline shapefile was converted to a route using ArcMap 9.0 - ArcToolbox - Linear Referencing Tools - Create Routes. The following tool parameters were used: Input line feature - allshots.shp; route identifier field - linename; output route feature class - allshots_route.shp. The rest of the parameters were left to the default values. This process step, as well as all subsequent process steps, were performed by the same person - VeeAnn A. Cross.
Source_Used_Citation_Abbreviation: allshots_lns.shp
Process_Date: 2006
Source_Produced_Citation_Abbreviation: allshots_route.shp
Process_Step:
Process_Description:
This polyline route was then calibrated using ArcMap 9.0 - ArcToolbox - Linear Referencing Tools - Calibrate Routes. The following parameters were used: input route features - allshots_route.shp; route identifier field - linename; input point features - allshots.shp; point identifier field - linename; measure field - shot; output route feature class - allshots_route_Calibrate.shp; measure calculation method - distance; search radius 0. The rest of the parameters left at the default.
Source_Used_Citation_Abbreviation: allshots_route.shp
Source_Used_Citation_Abbreviation: allshots.shp
Process_Date: 2006
Source_Produced_Citation_Abbreviation: allshots_route_Calibrate.shp
Process_Step:
Process_Description:
Added hatches to the calibrated route using ArcMap 9.0 by opening the layer properties and selecting the Hatches tab. Create a hatch interval of 500 for the Hatch Class, then for Hatch Def(1) place a marker hatch every 1 hatch interval. From the Hatch Class Add a Hatch Definition - Add End Hatch Definition and set these to a marker Hatch. By displaying the labels for both Hatch Definitions, a quick comparison between the hatches and shot navigation makes sure things are behaving as intended. Then turn the labels off.
Source_Used_Citation_Abbreviation: allshots_route_Calibrate.shp
Process_Date: 2006
Source_Produced_Citation_Abbreviation: allshots_route_Calibrate.shp
Process_Step:
Process_Description:
Within ArcMap 9.0 - by going to Tools - Customize - Commands and scrolling down to the Category "Linear Referencing", the icon for the command "Convert Hatches to Graphics can be added to a toolbar. Once this is done, that tool can be used to convert the hatches to graphics.
Process_Date: 2006
Process_Step:
Process_Description:
Convert these graphics to a shapefile using XTools Pro version 5.0.
Source_Used_Citation_Abbreviation: displayed graphic points
Process_Date: 2006
Source_Produced_Citation_Abbreviation: shot500graphics.shp
Process_Step:
Process_Description:
Use ArcMap 9.0 - ArcToolbox - Linear Referencing Tools - Locate Features Along Route. The following parameters were used: Input Features:shot500graphics.shp; Input Route Features - allshots_route_Calibrate.shp; route identifier field - linename; Search Radius - 5 meters; output event table - shot500graphics_LocateFeatur.dbf; output route identifier field - linename; measure field - shot. All the rest of the parameters left to the default.
Source_Used_Citation_Abbreviation: shot500graphics.shp
Source_Used_Citation_Abbreviation: allshots_route_Calibrate.shp
Process_Date: 2006
Source_Produced_Citation_Abbreviation: shot500graphics_LocateFeatur.dbf
Process_Step:
Process_Description:
Convert the event layer to a shapefile by exporting the data (right mouse click on event layer, Data, Export Data).
Source_Used_Citation_Abbreviation: shot500graphics_LocateFeatur Events
Process_Date: 2006
Source_Produced_Citation_Abbreviation: shot500tmp.shp
Process_Step:
Process_Description:
Using VACExtras version 1.95 (an ArcMap extension written in Woods Hole) in ArcMap 9.0 the attribute table of the shot navigation was sorted primarily by the attribute linename with a secondary sort field by the attribute shot.
Source_Used_Citation_Abbreviation: shot500tmp.shp
Process_Date: 2006
Source_Produced_Citation_Abbreviation: shot500sort.shp
Process_Step:
Process_Description:
There are lines that show no break between files because the Knudsen was set to record data and automatically switch files every 20,000 shots. This made the last shot of one file the same as the first shot of the subsequent file. This leads to duplicate shot #1 at these bounds during linear referencing. The first shot #1 should really be shot 19999 of the previous file. To account for this, the attributes of the shapefile were edit to reflect this (effectively removing the duplicate shots). So for instance, two records have the linename 0001_2006_249_1447_002 and shot 1. The first record was changed to linename 001_2006_249_1340_001 with shot number 19999. This way, every shot has a unique line number - shot combination.
Source_Used_Citation_Abbreviation: shot500sort.shp
Process_Date: 2006
Source_Produced_Citation_Abbreviation: shot500sort.shp
Process_Step:
Process_Description:
The shot point shapefile was reprojected to Geographic, NAD83 using ArcMap 9.2, ArcToolbox - Data management Tools - Projections and Transformations - Feature - Project. Because the input file and output file have the same datum, no datum transformation was required.
Source_Used_Citation_Abbreviation: shot500sort.shp
Process_Date: 2009
Source_Produced_Citation_Abbreviation: shot500sort_geog.shp
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: 842
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
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: shot500sort_geog
Entity_Type_Definition: Shapefile attribute table.
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: linename
Attribute_Definition: The unique identifier for each line of data acquisition.
Attribute_Definition_Source: Software generated.
Attribute_Domain_Values:
Unrepresentable_Domain: Text field identifying the line.
Attribute:
Attribute_Label: shot
Attribute_Definition: The seismic shot number associated with the navigation fix.
Attribute_Definition_Source: Software generated.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 19,999
Attribute_Units_of_Measure: shot number
Attribute:
Attribute_Label: Distance
Attribute_Definition:
The distance (in meters) that the point falls off the calibrated route polyline.
Attribute_Definition_Source: ESRI Linear Referencing - Locate Feature Along Routes tool
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 0
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: Id
Attribute_Definition:
An attribute carried over when the graphics hatches were converted to a shapefile.
Attribute_Definition_Source: Software generated (XTools Pro)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 0
Enumerated_Domain_Value_Definition:
An element ID field generated when graphics are converted to a shapefile. The default value of 0 is supplied to all features upon creation.
Enumerated_Domain_Value_Definition_Source: XTools Pro
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: 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
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 point shapefile as well as the associated metadata files.
Transfer_Size: 0.058 MB
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
<https://pubs.usgs.gov/of/2009/1151/data/navigation/seismics/shot500sort_geog.zip>
Network_Resource_Name: <https://pubs.usgs.gov/of/2009/1151/html/catalog.html>
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 point shapefile format. The user must have software capable of uncompressing the WinZip file and reading/displaying the shapefile.
Metadata_Reference_Information:
Metadata_Date: 20100325
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 Thu Mar 25 13:10:30 2010