Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey and the Department of Interior Publication_Date: 2012 Title: Airborne geophysical survey: Bruneau, Idaho Geospatial_Data_Presentation_Form: analog contour map Online_Linkage: https://mrdata.usgs.gov/magnetic/show-survey.php?id=ID3040_pg.shp Description: Abstract: Aeromagnetic data were collected along flight lines by instruments in an aircraft that recorded magnetic-field values and locations. In the earlier days of surveying, the only way to represent this data was to generate an analog map with contour lines. This dataset is a representation of the digitized contour lines either by following the lines or by choosing the intersection of the contour and flight-line to create a value of the magnetic field. The values presented are latitude, longitude, and map magnetic-field values. Purpose: Aeromagnetic surveys are used for geophysical prospecting. Some variations in magnetic measurements are caused by rocks that contain significant amounts of magnetic minerals (magnetite being the most common). These anomalies reflect variations in the amount and type of magnetic material and the shape and depth of the body of rock. The features and patterns of aeromagnetic anomalies can also be used to delineate details of subsurface geology including the locations of buried faults and the thickness of surficial sedimentary rocks. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 197403 Ending_Date: 197404 Currentness_Reference: ground condition Status: Progress: complete Maintenance_and_Update_Frequency: none planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -116.41 East_Bounding_Coordinate: -115.59 North_Bounding_Coordinate: 43.16 South_Bounding_Coordinate: 42.74 Data_Set_G-Polygon: Data_Set_G-Polygon_Outer_G-Ring: G-Ring: -116.41 43.16, -115.59 43.16, -115.59 42.74, -116.41 42.74, -116.41 43.16 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:a507f5d4-13ee-413c-973b-b3062a26480b Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: geophysical surveys Theme_Keyword: aeromagnetic data Theme_Keyword: airborne surveys Theme_Keyword: magnetic surveys Theme_Keyword: residual magnetic field Theme_Keyword: total field Theme_Keyword: magnetic Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: geophysics Theme_Keyword: geospatial datasets Theme_Keyword: magnetic field (earth) Theme_Keyword: aeromagnetic surveying Theme_Keyword: field monitoring stations Place: Place_Keyword_Thesaurus: none Place_Keyword: United States Place_Keyword: Idaho Place_Keyword: ID Place_Keyword: Bruneau Place: Place_Keyword_Thesaurus: Common Geographic Areas Place_Keyword: f16001 = Ada Place_Keyword: f16039 = Elmore Place_Keyword: f16073 = Owyhee Access_Constraints: none Use_Constraints: none. Acknowledgement of the U.S. Geological Survey would be appreciated in products derived from these data. Browse_Graphic: Browse_Graphic_File_Name: http://mrdata.usgs.gov/geophysics/surveys/geophysics3/ID/id3040.jpg Browse_Graphic_File_Description: Reduced-size image depicting the data, 1118 x 854 pixels, 196,115 bytes Browse_Graphic_File_Type: JPEG Data_Set_Credit: These USGS employees contributed to reformatting and archiving these data: Viki Bankey, Pat Hill, Holly Hindle, Bob Kucks, Sarah Shearer, Esther Castellanous Cross_Reference: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 1974 Title: Residual magnetic intensity map - Bruneau, Idaho Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: OFR 74-149 Publication_Information: Publication_Place: Denver, CO Publisher: U.S. Geological Survey Other_Citation_Details: map scale 1:62,500 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The data shown on the original map have been processed using various formulas and methods that are not usually documented but that represent industry standard practices for airborne data reduction. For example, position is listed as latitude and longitude, but these values were derived from the raw navigation data depending on the system used. (see notes under horizontal accuracy). Line numbers were added to records, and unusable data at flight-line ends were discarded (as aircraft slowed and turned around). Separate recordings were correlated by time and assigned to the correct location. The exact accuracies of these processing steps may not be known. They are discussed in the sections on attribute or positional accuracies. Logical_Consistency_Report: The data on the original map were collected by a single contractor or group who were responsible for collecting and processing the data. The data from this survey were collected using the same instruments (magnetometers, altimeters, navigational systems) throughout the survey and were collected in a normal length of time with no long delays between survey beginning and end. Survey layout specified the conditions and specifications under which these data were collected. Standard industry practices of the time were followed in data collection and processing. Completeness_Report: Data is complete as reasonably digitized from the original map Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Flight Path Recovery Horizontal position of the survey aircraft used to collect data were determined by reconciling down-looking photographs (recorded on continuous-strip film) with topographic maps and orthophotoquadrangle maps. Fiducial numbers and marks, impressed on any paper strips that were recording data or added to magnetic tape records, were included as a function of time to further reconcile location with instrumentation. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: The aircraft vertical position was determined using the navigational positioning equipment on the aircraft, which were radar altimeter and barometric altimeter. Lineage: Process_Step: Process_Description: Conversion of measured values to geographic position and magnetic values was performed by the processors using industry standard practices. Details are found under Horizontal_Position_Accuracy_Report, and Vertical_Position_Accuracy_Report Unless noted, conversion processes were not documented. Products may include some written documentation. Process_Date: 1974 Process_Step: Process_Description: USGS digitized original map to ASCII format. USGS personnel used the software package Oasis Montaj by Geosoft, Inc., to read in the ASCII digitized data and create raster JPEG images. Process_Date: 2008 Process_Step: Process_Description: Added keywords section with USGS persistent identifier as theme keyword. Process_Date: 20201110 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: VeeAnn A. Cross Contact_Position: Marine Geologist Contact_Address: Address_Type: Mailing and Physical Address: 384 Woods Hole Road 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 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: point Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.0001 Longitude_Resolution: 0.0001 Geographic_Coordinate_Units: decimal degrees Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6,378,206.4 Denominator_of_Flattening_Ratio: 294.98 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: Airborne survey specifications These items are constant for the entire survey Project number: 3040 Project name: Bruneau Survey flown by: Aerial Survey flown for: U.S. Geological Survey Approx. no. of line miles: 590 Survey height: 8000 ft Altitude method: Above sea level Flight-line spacing: 2.0 mi Flight-line direction: N-S Aircraft used: Piper Aztec or Cessna 310 Airport - arrival: unknown Airport - departure: unknown Sensor tow distance: unknown Magnetometer used: Geometrics G-803 Data recording interval: unknown Regional field removed: POGO Entity_and_Attribute_Detail_Citation: Nettleton, L.L., 1971, Elementary Gravity and Magnetics for Geologists and Seismologists: Society of Exploration Geophysicists Monograph Series No. 1. Dobrin, M.B., 1976, Introduction to Geophysical Prospecting: New York, McGraw-Hill Book Company, Sheriff, R.E., 1984, Encyclopedic dictionary of exploration geophysics: Tulsa, OK, Society of Exploration Geophysicists. Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Web site administration: U.S Geological Survey Central Publications Group Contact_Address: Address_Type: mailing address Address: Central Publications Group USGS MS 902, Box 25046 DFC City: Denver State_or_Province: CO Postal_Code: 80225-0046 Contact_Voice_Telephone: 303-236-5486 Distribution_Liability: Although all data published on this website have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and 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: ASCII Format_Specification: Each line contains data in the following format, beginning with line 1 (no header included): longitude F12.4 Longitude in decimal degrees latitude F12.4 Latitude in decimal degrees mag F8.1 Magnetic value represented on map. This is the residual field value. Format_Version_Date: 1998 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://crustal.usgs.gov/geophysics/index.html for link to report Fees: none Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Peter N Schweitzer Contact_Organization: USGS Eastern Mineral and Environmental Resources Science Center Contact_Position: Geologist Contact_Address: Address_Type: mailing address Address: 12201 Sunrise Valley Drive City: Reston State_or_Province: VA Postal_Code: 20192-0002 Country: USA Contact_Voice_Telephone: 703-648-6533 Contact_Facsimile_Telephone: 703-648-6252 Contact_Electronic_Mail_Address: pschweitzer@usgs.gov Resource_Description: id3040_meta.txt Distribution_Liability: This dataset was prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: CSV Format_Information_Content: Flight-line airborne magnetic anomaly measurements File_Decompression_Technique: none Transfer_Size: 0.4127368927002 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://mrdata.usgs.gov/geophysics/surveys/geophysics3/ID/id3040.txt Fees: none Metadata_Reference_Information: Metadata_Date: 20201110 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: USGS Crustal Geophysics and Geochemistry Science Center Contact_Address: Address_Type: mailing address Address: Magnetic and Gravity Information U.S. Geological Survey Box 25046 Mail Stop 964 Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225-0046 Contact_Voice_Telephone: 303-236-5652 Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998