Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 2007 Title: ASV_SEISMICSHOT500 - Shot Points at 500 Shot Intervals for Seismic Data Collected with Autonomous Surface Vehicle (ASV) IRIS in Apalachicola Bay and St. George Sound, FL. Edition: 1.0 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: Open-File Report Issue_Identification: 2006-1381 Publication_Information: Publication_Place: Woods Hole Science Center, Woods Hole, Massachusetts Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Online_Linkage: http://pubs.usgs.gov/of/2006/1381/GIS/shapefiles/ASV_SeismicShot500.zip Larger_Work_Citation: Citation_Information: Originator: David C. Twichell Originator: Brian D. Andrews Originator: H. Lee Edmiston Originator: William R. Stevenson Publication_Date: 2007 Title: Geophysical Mapping of oyster habitats in a shallow estuary; Apalachicola Bay, Florida Edition: 1.0 Series_Information: Series_Name: Open-File Report Issue_Identification: 2006-1381 Publication_Information: Publication_Place: Woods Hole Science Center, Woods Hole, Massachusetts Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Online_Linkage: http://pubs.usgs.gov/of/2006/1381/ Description: Abstract: These data were collected under a cooperative mapping program between the U.S. Geological Survey (USGS), the National Oceanic and Atmospheric Administration Coastal Services Center (NOAA\CSC), and the Apalachicola National Estuarine Research Reserve (NERR). The primary objectives of this program were to collect marine geophysical data to develop a suite of seafloor maps to better define the extent of oyster habitats, the overall seafloor geology of the bay and provide updated information for management of this resource. In addition to their value for management of the bay's oyster resources, the maps also provide a geologic framework for scientific research and the public. High-resolution bathymetry, backscatter intensity, and seismic profile data were collected over 230 square kilometers of the floor of the bay. The study focused on the Apalachicola Bay and Western St. George Sound portions of the estuary mostly in depths > 2.0 meters. Purpose: This shapefile represents the shotpoints at a 500 shot interval derived from the navigation for seismic-reflection profiles collected from the ASV IRIS during USGS field activity 06001 in Apalachicola Bay and St. George Sound, Florida. The purpose of these data is to provide geographic locations of shot points so that features in the seismic profiles can be properly located along the tracklines. 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: -85.062548 East_Bounding_Coordinate: -84.809732 North_Bounding_Coordinate: 29.746337 South_Bounding_Coordinate: 29.618655 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 Science Center Theme_Keyword: WHSC Theme_Keyword: Seafloor Theme_Keyword: Marine Geology Theme_Keyword: field activity serial number 06001 Theme_Keyword: Seismic Profile Theme_Keyword: ASV Theme_Keyword: IRIS Theme_Keyword: Autonomous Surface Vehicle Theme_Keyword: seafloor mapping Theme_Keyword: geologic mapping Theme_Keyword: seismic shotpoints Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: oceans and estuaries Theme_Keyword: transportation Theme_Keyword: location Place: Place_Keyword_Thesaurus: General Place_Keyword: Apalachicola Bay Place_Keyword: Florida Place_Keyword: Apalachicola National Estuarine Research Reserve Place_Keyword: St. George Sound Place_Keyword: Gulf of Mexico Place_Keyword: United States Stratum: Stratum_Keyword_Thesaurus: General Stratum_Keyword: Seafloor Stratum_Keyword: Subsurface Temporal: Temporal_Keyword_Thesaurus: General Temporal_Keyword: 2006 Access_Constraints: None Use_Constraints: These data should not be used at resolutions for which they are not intended. 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 source of this information. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Brian Andrews Contact_Organization: U.S. Geological Survey Contact_Position: Geographer Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: 508-548-8700 x2348 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: bandrews@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/of/2006/1381/GIS/thumbnails/ASV_SeismicShot500.jpg Browse_Graphic_File_Description: JPEG image of seismic shots on ASV lines. Browse_Graphic_File_Type: JPEG Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.2.1350 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: RTK GPS was used to navigate the survey systems for seismic-reflection systems. The GPS antenna was mounted over the seismic system. Completeness_Report: Shot points are not available for sections of the survey lines where seismic data were not logged. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Navigation was recorded to all data acquisition systems using Real Time Kinematic GPS at a one second interval. Horizontal accuracy of the navigation is assumed to be +/- 1 meter. The shot point file and survey line file for the seismic data are both derived from the same navigation file that was logged by the seismic acquisition system, but because the two were processed differently, the shot points do not always fall directly on the survey line. To create the shot point file, the navigation was queried to extract every 500th point starting with shot point 500. By contrast, to create the survey line file, the navigation was queried at a one minute interval (every 60th point), and then a line was drawn using these points. Because of the different processing approaches, many of the shot points, although close, do not fall exactly on the survey line. If meter accuracy is truely needed, it would be best to extract the navigation from the archived SEG-Y seismic files. Lineage: Process_Step: Process_Description: Navigation was extracted from raw SEG-Y format and converted to ASCII text file. The file containing navigation for each shot was then queried to extract shots at 500 shot interval using the awk script makenav developed for USGS by Bill Danforth. The 500 shot file for each survey line was concatenated and imported to ArcGIS 9.1 then converted to a point feature class. Process_Date: 20070520 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Brian Andrews Contact_Organization: U.S. Geological Survey Contact_Position: Geographer Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: 508-548-8700 x2348 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: bandrews@usgs.gov Process_Step: Process_Description: Exported feature class from personal geodatabase to a shapefile and projected to geographic. Process_Date: 200707 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Brian Andrews Contact_Organization: U. S. Geological Survey Contact_Position: Geographer Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x 2348 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: bandrews@usgs.gov 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: 4183 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.000000 Longitude_Resolution: 0.000000 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: D_WGS_1984 Ellipsoid_Name: WGS_1984 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257224 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: ASV_SeismicShot500 Entity_Type_Definition: Shotpoint navigation for ASV seismic data collected during field activity 06001. Entity_Type_Definition_Source: USGS 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: Lon Attribute_Definition: Longitude coordinate of shot Attribute_Definition_Source: USGS Attribute: Attribute_Label: Lat Attribute_Definition: Latitude coordinate of shot Attribute_Definition_Source: USGS Attribute: Attribute_Label: Line Attribute_Definition: Name of survey line and file name Attribute_Definition_Source: USGS Attribute: Attribute_Label: Shot Attribute_Definition: The number of the seismic shot in 500 shot intervals Attribute_Definition_Source: USGS Attribute: Attribute_Label: UTMX Attribute_Definition: The X coordinate in Universal Transverse Mercator (UTM), meters Attribute_Definition_Source: USGS Attribute: Attribute_Label: UTMY Attribute_Definition: The Y Coordinate in Universal Transverse Mercator (UTM), meters Attribute_Definition_Source: USGS Attribute: Attribute_Label: YEAR_ Attribute_Definition: Calendar year data were collected Attribute_Definition_Source: USGS Attribute: Attribute_Label: JDHrMinSec Attribute_Definition: Time in Julian day, hour, minute, second format. Attribute_Definition_Source: USGS Attribute: Attribute_Label: JDay Attribute_Definition: Day of the year indentified as Julian day. Attribute_Definition_Source: USGS Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Brian Andrews Contact_Organization: U.S. Geological Survey Contact_Position: Geographer Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: 508-548-8700 x2348 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: bandrews@usgs.gov Resource_Description: Downloadable Data Distribution_Liability: Although this data set has been used by the U.S. Geological Survey (USGS), no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and/or related materials. 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: SHP Format_Version_Number: ArcGIS 9.2 Format_Specification: ESRI point shapefile Format_Information_Content: Shotpoint navigation for seismic-reflection profiles File_Decompression_Technique: zip Transfer_Size: 30 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/2006/1381/GIS/shapefiles/ASV_SeismicShot500.zip Access_Instructions: Data can be downloaded via the World Wide Web (WWW) Offline_Option: Offline_Media: DVD-ROM Recording_Capacity: Recording_Density: 4.75 Recording_Density_Units: Gbytes Recording_Format: UDF Technical_Prerequisites: The data are available in Environmental Systems Research Institute (ESRI) shapefile format. The user must have ArcGIS or ArcView 3.3 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing data. A free data viewer, ArcExplorer, capable of displaying the data is available from ESRI at www.esri.com. Metadata_Reference_Information: Metadata_Date: 20070830 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Brian Andrews Contact_Position: Geographer Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: 508-548-8700 x2348 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: bandrews@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