Citation:
Citation_Information:
Originator:
U.S. Geological Survey, Department of Interior and the
National Geophysical Data Center, NOAA
Publication_Date: 2001
Title:
Airborne geophysical survey: Puget Lowlands A, Washington Survey Part 1 of 3
Geospatial_Data_Presentation_Form: tabular digital data
Online_Linkage: https://mrdata.usgs.gov/magnetic/show-survey.php?id=WA_4197
Larger_Work_Citation:
Citation_Information:
Originator:
U.S. Geological Survey, Department of the Interior, and the
National Geophysical Data Center
Publication_Date: 2001
Title:
Digital flight-line aeromagnetic data sets of the
Conterminous United States, Hawaii, and Puerto Rico
Series_Information:
Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: OFR 02-0361
Publication_Information:
Publication_Place: Denver, CO
Publisher: U.S. Geological Survey
Description:
Abstract:
Aeromagnetic data were collected along flight lines by instruments in an
aircraft that recorded magnetic-field values and locations. This dataset
presents latitude, longitude, altitude, and 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.
Aeromagnetic anomaly maps are important tools in mapping
surficial and buried igneous rocks. 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.
Supplemental_Information:
The U.S. Geological Survey has contracted or flown numerous
airborne surveys over a long period (1950's to present). Not
all flight-line data have been released to the public
because of lack of personnel to reformat data and service the
requests. With the improvement in digital communication
and the ability to store and transmit large data sets, the
USGS is now able to release the flight-line data in a
common format.
A companion CD-ROM/web site has been released containing
magnetic data that were generated by digitizing analog maps.
Digital flight-line data used to create the analog maps are
unavailable. Reference is in the Cross-Reference section of
this metadata file.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 199707
Ending_Date: 199709
Currentness_Reference: ground condition
Status:
Progress: complete
Maintenance_and_Update_Frequency: none planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -123.50
East_Bounding_Coordinate: -121.75
North_Bounding_Coordinate: 49.00
South_Bounding_Coordinate: 46.75
Data_Set_G-Polygon:
Data_Set_G-Polygon_Outer_G-Ring:
G-Ring:
-123.25 49.00, -122.00 49.00, -122.00 48.00,
-121.75 48.00, -121.75 47.25, -122.00 47.25,
-122.00 47.00, -122.25 47.00, -122.25 46.75,
-122.50 46.75, -122.50 46.90, -122.86 46.90,
-122.86 47.00, -123.50 47.00, -123.50 47.50,
-123.25 47.50, -123.25 49.00
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:eb080248-2904-4716-bae3-f3a62c478aa9
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: Washington
Place_Keyword: WA
Place_Keyword: Puget Lowlands
Place_Keyword: Puget Sound
Place:
Place_Keyword_Thesaurus: Common Geographic Areas
Place_Keyword: f53029 = Island
Place_Keyword: f53031 = Jefferson
Place_Keyword: f53033 = King
Place_Keyword: f53035 = Kitsap
Place_Keyword: f53041 = Lewis
Place_Keyword: f53053 = Pierce
Place_Keyword: f53055 = San Juan
Place_Keyword: f53057 = Skagit
Place_Keyword: f53061 = Snohomish
Place_Keyword: f53067 = Thurston
Place_Keyword: f53073 = Whatcom
Access_Constraints: none
Use_Constraints:
none. Acknowledgement of the U.S. Geological Survey and the
National Geophysical Data Center would be appreciated
in products derived from these data.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: USGS Gravity and Magnetics Contact
Contact_Address:
Address_Type: mailing address
Address:
U.S. Geological Survey
Box 25046 Mail Stop 964
Denver Federal Center
City: Denver
State_or_Province: CO
Postal_Code: 80225
Contact_Voice_Telephone: 303-236-1343
Contact_Electronic_Mail_Address: grav_mag@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name:
Browse_Graphic_File_Description:
Reduced-size image depicting the data, 509 x 620 pixels, 48,535 bytes
Browse_Graphic_File_Type: JPEG
Data_Set_Credit:
These USGS employees contributed to reformatting and archiving these data:
Viki Bankey, Carol Finn, Pat Hill, Holly Hindle,
Bob Kucks, Vicki Rystrom, Sarah Shearer
Cooperating contributors from the National Geophysical Data Center are:
Ronald Buhmann, David Dater, Susan McLean,
Stewart Racey
Native_Data_Set_Environment:
These data were originally recorded on 9-track
magnetic tapes and were transferred to CD-ROM.
Data processing took place on an HP workstation
running a Windows NT operating system. Data
were reformatted using the Geosoft, Inc., program
Oasis Montaj version 4.3.
Cross_Reference:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 1999
Title:
Digitized Aeromagnetic Datasets of the Conterminous United States,
Hawaii, and Puerto Rico
Geospatial_Data_Presentation_Form: raster digital data
Series_Information:
Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: OFR 99-557
Publication_Information:
Publication_Place: Denver CO
Publisher: U.S. Geological Survey
Other_Citation_Details:
CD-ROM or online files
Complements this publication with analog data
Online_Linkage: http://pubs.usgs.gov/of/1999/ofr-99-0557/
Cross_Reference:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 1999
Title:
Puget Sound aeromagnetic maps and data,
OFR 99-0514
Geospatial_Data_Presentation_Form: map
Series_Information:
Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: OFR 99-514
Publication_Information:
Publication_Place: Denver, CO
Publisher: U.S. Geological Survey
Other_Citation_Details: