ALLASV_NODUPES_SORT.SHP: All Autonomous Surface Vessel IRIS Shotpoint Navigation for Chirp Seismic Data in Apalachicola Bay collected on U.S. Geological Survey Cruise 06001 (Geographic, WGS84)

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: David C. Twichell
Originator: VeeAnn A. Cross
Publication_Date: 2012
Title:
ALLASV_NODUPES_SORT.SHP: All Autonomous Surface Vessel IRIS Shotpoint Navigation for Chirp Seismic Data in Apalachicola Bay collected on U.S. Geological Survey Cruise 06001 (Geographic, WGS84)
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2012-1003
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/2012/1003/data/shapefiles/allasv_nodupes.zip>
Online_Linkage: <http://pubs.usgs.gov/of/2012/1003/html/catalog.html>
Larger_Work_Citation:
Citation_Information:
Originator: V.A. Cross
Originator: D.C. Twichell
Originator: D.S. Foster
Originator: T.F. O'Brien
Publication_Date: 2012
Title:
Apalachicola Bay Interpreted Seismic Horizons and Updated IRIS Chirp Seismic-Reflection Data
Edition: 1
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2012-1003
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/2012/1003/>
Description:
Abstract:
Apalachicola Bay and St. George Sound contain the largest oyster fishery in Florida, and the growth and distribution of the numerous oyster reefs here are the combined product of modern estuarine conditions and the late Holocene evolution of the bay. A suite of geophysical data and cores were collected during a cooperative study by the U.S. Geological Survey, the National Oceanic and Atmospheric Administration Coastal Services Center, and the Apalachicola National Estuarine Research Reserve to refine the geology of the bay floor as well as the bay's Holocene stratigraphy. Sidescan-sonar imagery, bathymetry, high-resolution seismic profiles, and cores show that oyster reefs occupy the crests of sandy shoals that range from 1 to 7 kilometers in length, while most of the remainder of the bay floor is covered by mud. The sandy shoals are the surficial expression of broader sand deposits associated with deltas that advanced southward into the bay between 6,400 and 4,400 years before present. The seismic and core data indicate that the extent of oyster reefs was greatest between 2,400 and 1,200 years before present and has decreased since then due to the continued input of mud to the bay by the Apalachicola River. The association of oyster reefs with the middle to late Holocene sandy delta deposits indicates that the present distribution of oyster beds is controlled in part by the geologic evolution of the estuary. For more information on the surveys involved in this project, see <http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2005-001-FA> and <http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2006-001-FA>.
Purpose:
This shapefile represents all the unique shotpoint navigation for the IRIS Chirp seismics collected in Apalachicola Bay, Florida. This also serves as the archive of these navigation data.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20060603
Ending_Date: 20060627
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -85.062710
East_Bounding_Coordinate: -84.809553
North_Bounding_Coordinate: 29.746692
South_Bounding_Coordinate: 29.618457
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 06001
Theme_Keyword: Field Activity 2006-001-FA
Theme_Keyword: Info Bank ID R-1-06-GM
Theme_Keyword: navigation
Theme_Keyword: seismic-reflection
Theme_Keyword: shotpoint navigation
Theme_Keyword: point shapefile
Theme_Keyword: ASV IRIS
Theme_Keyword: Autonomous Surface Vessel
Theme_Keyword: Independently (or) Remotely Influenced Surveyor
Theme_Keyword: chirp seismics
Theme_Keyword: EdgeTech SB-424
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: oceans and estuaries
Theme_Keyword: oceans and coastal
Theme_Keyword: location
Place:
Place_Keyword_Thesaurus: General
Place_Keyword: Apalachicola Bay
Place_Keyword: Florida
Place_Keyword: Apalachicola National Estuarine Research Reserve
Place_Keyword: Gulf of Mexico
Place_Keyword: United States
Place_Keyword: St. Vincent Island
Place_Keyword: Little St. George Island
Place_Keyword: St. George Island
Place_Keyword: North America
Access_Constraints: None.
Use_Constraints:
Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS) as the originators of this dataset.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: David C. Twichell
Contact_Organization: U.S. Geological Survey
Contact_Position: Oceanographer
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 x2266
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: dtwichell@usgs.gov
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.4000
Cross_Reference:
Citation_Information:
Originator: D.C. Twichell
Originator: B.D. Andrews
Originator: H.L. Edmiston
Originator: W.R. Stevenson
Publication_Date: 2007
Title:
Geophysical mapping of oyster habitats in a shallow estuary; Apalachicola Bay, Florida
Edition: 1
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2006-1381
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/2006/1381/>
Cross_Reference:
Citation_Information:
Originator: D.C. Twichell
Originator: E.A. Pendleton
Originator: R.Z. Poore
Originator: L.E. Osterman
Originator: K.W. Kelso
Publication_Date: 2009
Title:
Vibracore, radiocarbon, microfossil, and grain-size data from Apalachicola Bay, Florida
Edition: 1
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2009-1031
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/2009/1031/>
Cross_Reference:
Citation_Information:
Originator: E. Bergeron
Originator: C.R. Worley
Originator: T.F. O'Brien
Publication_Date: 2007
Title:
Progress in the development of shallow-water mapping systems: using an autonomous surface vehicle for shallow-water geophysical studies
Series_Information:
Series_Name: Sea Technology
Issue_Identification: v. 48, no. 6, p. 10-15
Publication_Information:
Publication_Place: Arlington, VA
Publisher: Compass Publications, Inc.
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Although the "seistime" attribute is extracted from the header of the seismic data files, it's clear there were some problems with the information recorded in the header. Periodically the time sequence is out of order. For instance, times (in the format hhmmss) on consecutive shots read 161047, 161048, 161018, 161050. Obviously, the 161018 is chronologically out of order. These problems were not fixed in the attribute table.
Logical_Consistency_Report:
No duplicate features are present. Inconsistencies exist in the filenaming convention for individual seismic data collection lines. Because the filenames reflect the original data file names acquired in the field, they were left alone.
Completeness_Report:
No data were acquired on the following dates: 6/8/2006, 6/10/2006 6/12/2006, 6/13/2006, 6/15/2006, 6/16/2006, 6/17/2006, 6/18/2006, 6/19/2006, 6/20/2006. These dates correspond to Julian days 159, 161, 163, 164, 166, 167, 168, 169, 170, and 171 respectively. In addition, lines for which no valid seismic data were available, or extremely short lines, were deleted. Some lines acquired seismic data, but little or no navigation. These lines are also excluded. One line was re-run, so the original problematic line was excluded. The list of collected seismic lines excluded from this and subsequent datasets is as follows: Julian day 155 - apalachicola000 (rerun), apalachicola020 (too short), apalachicola027 (insufficient navigation). Julian day 160 - day160001 (insufficient navigation). Julian day 165 - day165001 (too short). Julian day 172 - JD172010 (too short), JD172014 (too short), JD172025 (too short). Julian day 173 - JD173009 (too short). Julian day 174 - JD174010 (too short).
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
IRIS was navigated with a Real-Time Kinematic (RTK) GPS, with the GPS antenna mounted directly over the seismic transducer. This system can provide positions to within 0.1 meters. However, due to some errors with the acquisition software, this accuracy is reduced. The accuracy is approximately 2 m given the constraints of the acquisition system.
Lineage:
Source_Information:
Source_Contribution:
The data were collected using the USGS WHCMSC Autonomous Surface Vessel (ASV) IRIS. This system is designed to operate in shallow water (1-5 meters). IRIS is a catamaran platform 3 meters in length, 1.2 meters in width, and approximately 118 kilograms. The vehicle is operated remotely through a wireless modem network enabling real-time monitoring of data acquisition. The system is navigated using a ZXW RTK augmented GPS system enclosed on a platform in the middle of the catamaran. An enclosed onboard micro-processor-based motor controller provides signals for speed and steering to hull-mounted brushless direct-current thrusters. A center-mounted keel encloses the chirp dual-frequency (100/400 kHz model 4200 EdgeTech) sidescan-sonar transducers and EdgeTech 424 chirp seismic-reflection hydrophones. Mounted in the port hull are the EdgeTech 424 chirp seismic-reflection transducer and a single-beam 235 kHz echosounder. A Sony IP based wireless video camera is installed on the mast of IRIS for the purpose of obstacle avoidance. An onboard Fluxgate magnetometer provides heading, heave, pitch, and roll. IRIS is powered by 2-4 24-volt NiMH batteries located in each hull and has an approximate run-time of five hours at 4 knots.
Process_Step:
Process_Description:
The seismic data were acquired with an EdgeTech SB-424 sub-bottom profiler and recorded in JSF format using JSTAR, EdgeTech's acquisition software. The research effort within Apalachicola Bay represented the first use of IRIS in full survey mode. As such, the system needed to be 'rung-out' during the first several days of surveying. A file naming convention developed over the first few days of surveying and acquisition settings (hardware and software) were modified several times until standardized settings could be established for Apalachicola Bay. Initial trouble-shooting dealt with several issues including a variation in the field in which navigation was stored within the JSF header and in the resolution of the navigation (seconds of arc vs. minutes of arc). Correcting these issues required re-running particular files though EdgeTech's DISCOVER software and saving new JSF files. Files that were saved through DISCOVER are signified by a 'yes' in the 'discover' field within the shapefile. A 'no' within the 'discover' field indicates that the JSF file was correct in its original format; re-running through DISCOVER was not required. The JSF files were then converted to SEG-Y format using jsf2segy, a C-program written by Tom O'Brien at the Woods Hole Coastal and Marine Science Center, U.S. Geological Survey.
Process_Date: 2006
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Tom O'Brien
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geophysical Systems Expert
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 x2246
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: tobrien@usgs.gov
Process_Step:
Process_Description:
These original SEG-Y files are in IEEE format and were converted to IBM floating point using SIOSEIS. In addition to this conversion, the shot numbers have been renumbered in order to start at one.
Process_Date: 2006
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: David S. Foster
Contact_Organization: U.S. Geological Survey
Contact_Position: 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 x2271
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: dfoster@usgs.gov
Process_Step:
Process_Description:
A csh script utilized Seismic Unix (v 4.0) to extract all of the unique navigation points from the SEG-Y header within the seismic data. These values were written to a comma-delimited text file. In addition to extracting the navigation, the csh script was used to generate JPEG images of each seismic profile. Due to modifications to acquisition parameters during the initial days of surveying, the format in which navigation was stored in the SEG-Y headers varies: navigation is stored in either decimal arc seconds (0.01) or decimal arc minutes (0.0001). In order to properly extract and convert navigation to latitude/longitude divisors of 360000 and 600000 were used for decimal arc seconds and decimal arc minutes, respectively.
Prior to JD172, the acquisition system did not consistently record longitude as a negative value (western hemisphere). Thus, either 600000 or -600000 was used to convert arc minutes to longitude based on whether the acquisition software recorded negative or positive longitude values. The divisors necessary for proper navigation extraction are contained in the attribute field "divisors" and are in the format "longitude divisor/ latitude divisor". This process step and all subsequent process steps were performed by the same person - VeeAnn A. Cross.
Process_Date: 2006
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 individual comma-delimited text files were then concatenated to generate a single navigation text file. This file was edited to remove invalid positions (usually latitude and longitude values of 0). In addition, calendar year and Julian day values were edited as necessary in order to reflect appropriate values. Finally, a header was added to the navigation text file in order to describe each column of data.
Process_Date: 2006
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 navigation text file was added to ArcMap 9.1 as an XY point event layer and converted to a point shapefile.
Process_Date: 2006
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 attribute "lmarkname" was added to the shapefile. This attribute will be used as the unique line name when loading the data into Landmark SeisWorks software. Seismic lines containing circles or turns were broken into multiple segments and assigned an unique line name by appending an "a" or "b" etc. to the line name. Landmark can load a portion of a SEG-Y file by loading the line segment that corresponds to the shot point navigation. (i.e. Splitting a SEGY file into segments is unnecessary, only the navigation needs to be split). During the initial days of surveying, the seismic acquisition system simultaneously recorded multiple files per survey line, creating some data redundancies. These overlapping portions of the survey line do not have a value entered in the "lmarkname" attribute
Process_Date: 2007
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:
All records that do not have a blank in the "lmarkname" attribute are selected and saved to a new point shapefile that will be used to load SEG-Y data into Landmark software.
Source_Used_Citation_Abbreviation: allasvpntnav_mod.shp
Process_Date: 2007
Source_Produced_Citation_Abbreviation: allasv4landmark.shp
Process_Step:
Process_Description:
Points with duplicate location need to be removed. Within ArcMap 9.2, using XTools Pro v. 5.2 - Table operations - Find Duplicates set the output to allasv_nodupes.shp. Other parameters: add feature to current map, create spatial index, compare by shape - check box to remove duplicates; index field name - index. Deselect the option to add ID field of the source feature. After this was done, a comparison showed the original shapefile had 123157 points and the new one had 122950 points.
Process_Date: 2008
Process_Step:
Process_Description:
Sort the new shapefile using VACExtras v 2.0, VAC Extras - Feat Conv - Table Sort. Primary sort is lmarkname in ascending order, secondary sort is shot in ascending order. Output: allasv_nodupes_sort.shp.
Process_Date: 2008
Process_Step:
Process_Description:
The attribute imgname was added to the shapefile. This reflects the prefix of the filename associated with the seismic-reflection profile JPEG image associated with the line. These names are not unique, as file names were repeated on different survey days.
Process_Date: 2008
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: 122926
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: allasv_nodupes_sort
Entity_Type_Definition: ESRI point 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: filename
Attribute_Definition:
Text field with the original filename prepended by "asv06" to indicate the IRIS as the source of data collection.
Attribute_Definition_Source: Data processor.
Attribute_Domain_Values:
Unrepresentable_Domain: Character set.
Attribute:
Attribute_Label: shot
Attribute_Definition: Seismic shot number corresponding to the navigation fix.
Attribute_Definition_Source: Data processor.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 39499
Attribute_Units_of_Measure: seismic shot
Attribute:
Attribute_Label: longitude
Attribute_Definition:
Longitude coordinate of the point location in decimal degrees, WGS84.
Attribute_Definition_Source: Data processor.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -85.06271
Range_Domain_Maximum: -84.809553
Attribute_Units_of_Measure: decimal degrees
Attribute:
Attribute_Label: latitude
Attribute_Definition: Latitude coordinate of the point in decimal degrees, WGS84.
Attribute_Definition_Source: Data processor.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 29.618457
Range_Domain_Maximum: 29.746692
Attribute_Units_of_Measure: decimal degrees
Attribute:
Attribute_Label: easting
Attribute_Definition:
Easting coordinate of the point rounded to the nearest meter based on UTM, Zone 16, WGS84.
Attribute_Definition_Source: Data processor.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 687471
Range_Domain_Maximum: 711848
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: northing
Attribute_Definition:
Northing coordinate of the point rounded to the nearest meter based on UTM, Zone 16, WGS84.
Attribute_Definition_Source: Data processor.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 3278111
Range_Domain_Maximum: 3292657
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: year
Attribute_Definition: Calendar year the data were collected.
Attribute_Definition_Source: Data processor.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 2006
Enumerated_Domain_Value_Definition: Year in which the data were collected.
Enumerated_Domain_Value_Definition_Source: Data processor.
Attribute:
Attribute_Label: jday
Attribute_Definition:
This number represents the Julian day of data collection based on UTC time. Julian day is the integer number representing the interval of time in days since January 1 of the year.
Attribute_Definition_Source: Data processor.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 154
Range_Domain_Maximum: 178
Attribute_Units_of_Measure: day
Attribute:
Attribute_Label: seistime
Attribute_Definition:
UTC time in the format HHMMSS of the time of the data point collection.
Attribute_Definition_Source: Data processor.
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: uniqueid
Attribute_Definition:
Text field providing a unique ID for the seismic line along which these data were collected. The first 3 numbers of the name represent Julian day. This convention was necessary because of the repeat use of linenames on different days.
Attribute_Definition_Source: Data processor.
Attribute_Domain_Values:
Unrepresentable_Domain: Character set.
Attribute:
Attribute_Label: lmarkname
Attribute_Definition:
An abbreviated text field which provides a unique line name associated with each point of data collection. The shorter name is easier to work with in the seismic interpretation software.
Attribute_Definition_Source: Data processor.
Attribute_Domain_Values:
Unrepresentable_Domain: Character set.
Attribute:
Attribute_Label: discover
Attribute_Definition:
Text field indicating if the recording software of the seismic line was the Discover software.
Attribute_Definition_Source: Data processor.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: no
Enumerated_Domain_Value_Definition: The Discover software was not used to record the data.
Enumerated_Domain_Value_Definition_Source: Data processor.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: yes
Enumerated_Domain_Value_Definition: The Discover software was used to record the data.
Enumerated_Domain_Value_Definition_Source: Data processor.
Attribute:
Attribute_Label: divisors
Attribute_Definition:
The divisor needed to convert the navigation recorded in the SEG-Y headers to decimal degrees. The first number represents the divisor of the longitude, while the second number indicates the divisor needed for the latitude.
Attribute_Definition_Source: Data processor.
Attribute_Domain_Values:
Unrepresentable_Domain: Character set.
Attribute:
Attribute_Label: imgname
Attribute_Definition:
The original file name of the acquired seismic line, which also corresponds to the prefix of the JPEG image filename associated with the seismic line.
Attribute_Definition_Source: Data processor.
Attribute_Domain_Values:
Unrepresentable_Domain: Character set.
Overview_Description:
Entity_and_Attribute_Overview:
The platform used to collect the original seismic data was the Woods Hole Coastal and Marine Science Center's Autonomous Surface Vessel (ASV) IRIS (Independently (or) Remotely Influenced Surveyor). Details of the platform can be found on the following web page: <http://woodshole.er.usgs.gov/operations/sfmapping/iris.htm>. IRIS is configured with an EdgeTech FFSB 424 chirp sub-bottom profiler that operates within a 4-24 kHz frequency range. The vehicle is navigated using Real-Time Kinematic (RTK) GPS. The antenna is mounted directly on the platform to minimize navigational error.
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 point shapefile as well as the associated metadata files.
Transfer_Size: 3.9 MB
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
<http://pubs.usgs.gov/of/2012/1003/data/shapefiles/allasv_nodupes.zip>
Network_Resource_Name: <http://pubs.usgs.gov/of/2012/1003/html/catalog.html>
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: 20120412
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 2.9.6 on Wed Apr 18 17:10:34 2012