Identification_Information: Citation: Citation_Information: Originator: Firefly Publication_Date: 2011 Title: sacramento_mag Geospatial_Data_Presentation_Form: point digital data Online_Linkage: Larger_Work_Citation: Citation_Information: Originator: V.E. Langenheim Publication_Date: 2015 Title: Aeromagnetic survey map of the Sacramento Valley, California Geospatial_Data_Presentation_Form: point digital data Series_Information: Series_Name: Open-File Report Issue_Identification: 2015-1186 Publication_Information: Publication_Place: Menlo Park, CA Publisher: U.S. Geological Survey Online_Linkage: http://dx.doi.org/10.3133/ofr20151186 Description: Abstract: High resolution aeromagnetic data collected in the southern and central Sacramento Valley, California Purpose: Aeromagnetic data were collected within the region to identify magnetic features as a basis for geophysical interpretations. Supplemental_Information: High resolution aeromagnetic data were collected by Firefly Aviation Ltd. using Geometrics G-822A cesium magnetometer for the airborne measurements and GEM System Overhauser GSM-19 magnetometer for the ground measurements. Lines were flown in a northeast-southwest direction and were spaced 800m apart. Northwest-southeast tie lines were also flown spaced 8000 m apart. The survey was flown at a nominal 244m above topography. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2011 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -122.3506 East_Bounding_Coordinate: -120.7304 North_Bounding_Coordinate: 39.66566 South_Bounding_Coordinate: 37.55565 Keywords: Theme: Theme_Keyword: magnetics Theme_Keyword: magnetic anomaly Theme_Keyword_Thesaurus: USGS Thesaurus Place: Place_Keyword: Sacramento Valley Place_Keyword: Sacramento Delta Place_Keyword: Sacramento, California Place_Keyword: Stockton, California Place_Keyword: Oroville, California Place_Keyword: Sutter Buttes, California Place_Keyword: Dunnigan Hills, California Place_Keyword_Thesaurus: GNIS Access_Constraints: none Use_Constraints: Uses of this digital data should not violate the spatial or attribute resolution of the data. Although the digital form of the data stores location and attribute values to several decimals of precision, the data is subject to the accuracy and precision inherent in the data due to data collection and processing limitations. Where this data is used in combination with other data, the precision and accuracy of the resulting dataset is limited by the precision and accuracy of the input datasets. Acknowledgement of the U.S. Geological Survey is appreciated for products derived from these data. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Victoria Langenheim Contact_Organization: U.S. Geological Survey Contact_Position: geophysicist Contact_Address: Address_Type: physical address Address: 345 Middlefield Rd. City: Menlo Park State_or_Province: CA Postal_Code: 94025 Country: USA Contact_Voice_Telephone: 650-329-5313 Contact_Electronic_Mail_Address: zulanger@usgs.gov Native_Data_Set_Environment: Geosoft Oasis Montaj Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: magnetic field values are reported to 0.01 nT Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: GPS accuracy should be within 1 meter Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: GPS accuracy should be within 1 meter Logical_Consistency_Report: see report Completeness_Report: see report Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Firefly Aviation Ltd. Publication_Date: 2011 Title: Final Survey Report High-Resolution Aeromagnetic Survey: USGS Contract No. G11PC00009, Sacramento Delta Area California, 2011 Geospatial_Data_Presentation_Form: vector digital data Type_of_Source_Media: disc Source_Time_Period_of_Content: Source_Currentness_Reference: ground condition at time collected Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20110422 Ending_Date: 20110519 Source_Citation_Abbreviation: Firefly Aviation Ltd., Project Report Aeromagnetic Survey, Sacramento Delta, California, 2011 Source_Contribution: see report Process_Step: Process_Description: Refer to Project Report by Firefly Aviation Ltd. Process_Date: 2011 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Point Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Entity point Point_and_Vector_Object_Count: 3071637 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.00001 Longitude_Resolution: 0.00001 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378206.4 Denominator_of_Flattening_Ratio: 298.257 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Datum_Name: North American Vertical Datum of 1988 Altitude_Distance_Units: meters Altitude_Encoding_Method: attribute values Altitude_Resolution: 0.1 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: sacramento_mag Entity_Type_Definition: ASCII Entity_Type_Definition_Source: Aeromagnetic data Attribute: Attribute_Label: Line Attribute_Definition: line number Attribute_Definition_Source: Firefly Aviation Ltd. Attribute: Attribute_Label: lon_27 Attribute_Definition: longitude coordinate Attribute_Definition_Source: Firefly Aviation Ltd. Attribute_Value_Accuracy_Information: Attribute_Value_Accuracy: 1 m Attribute: Attribute_Label: lat_27 Attribute_Definition: latitude coordinate Attribute_Definition_Source: Firefly Aviation Ltd. Attribute_Value_Accuracy_Information: Attribute_Value_Accuracy: 1 m Attribute: Attribute_Label: x_84 Attribute_Definition: x UTM zone 10 coordinate (WGS84) Attribute_Definition_Source: Firefly Aviation Ltd. Attribute_Value_Accuracy_Information: Attribute_Value_Accuracy: 1 m Attribute: Attribute_Label: y_84 Attribute_Definition: y UTM zone 10 coordinate (WGS84) Attribute_Definition_Source: Firefly Aviation Ltd. Attribute_Value_Accuracy_Information: Attribute_Value_Accuracy: 1 m Attribute: Attribute_Label: GPStime Attribute_Definition: GPS time hour, minutes, seconds (HH:MM:SS.ss) Attribute_Definition_Source: Firefly Aviation Ltd. Attribute: Attribute_Label: date Attribute_Definition: flight date (year/month/day) (YYYY/MM/DD) Attribute_Definition_Source: Firefly Aviation Ltd. Attribute: Attribute_Label: radar_alt Attribute_Definition: radar altimeter (meters above ground level) Attribute_Definition_Source: Firefly Aviation Ltd. Attribute_Value_Accuracy_Information: Attribute_Value_Accuracy: 1 m Attribute: Attribute_Label: baro Attribute_Definition: barometric altimeter (meters above mean sea level) Attribute_Definition_Source: Firefly Aviation Ltd. Attribute_Value_Accuracy_Information: Attribute_Value_Accuracy: 1.5 m Attribute: Attribute_Label: baro_lev Attribute_Definition: barometric altimeter (meters above mean sea level), leveled and corrected Attribute_Definition_Source: Firefly Aviation Ltd. Attribute_Value_Accuracy_Information: Attribute_Value_Accuracy: 1.5 m Attribute: Attribute_Label: gpsz Attribute_Definition: differentially corrected GPS altitude (meters above mean sea level) Attribute_Definition_Source: Firefly Aviation Ltd. Attribute_Value_Accuracy_Information: Attribute_Value_Accuracy: 1 m Attribute: Attribute_Label: diurnal Attribute_Definition: ground base station (nT) located at Vacaville airport (38 22'25" -122 57'46") Attribute_Definition_Source: Firefly Aviation Ltd. Attribute_Value_Accuracy_Information: Attribute_Value_Accuracy: 0.1 nT Attribute: Attribute_Label: rawmag Attribute_Definition: raw total field magnetic (nT) (uncompensated), tail Attribute_Definition_Source: Firefly Aviation Ltd. Attribute_Value_Accuracy_Information: Attribute_Value_Accuracy: 0.005 nT Attribute: Attribute_Label: cmag Attribute_Definition: compensated total-field magnetic (nT), tail Attribute_Definition_Source: Firefly Aviation Ltd. Attribute_Value_Accuracy_Information: Attribute_Value_Accuracy: 0.01 nT Attribute: Attribute_Label: maglag Attribute_Definition: lag corrected total field magnetic (nT) Attribute_Definition_Source: Firefly Aviation Ltd. Attribute_Value_Accuracy_Information: Attribute_Value_Accuracy: 0.1 nT Attribute: Attribute_Label: magdc Attribute_Definition: diurnal corrected total field magnetic (nT) Attribute_Definition_Source: Firefly Aviation Ltd. Attribute_Value_Accuracy_Information: Attribute_Value_Accuracy: 0.1 nT Attribute: Attribute_Label: mag_igrf Attribute_Definition: lag, diurnally corrected total-field magnetic minus igrf value at data point (altitude and day) using 2010 IGRF model (nT) Attribute_Definition_Source: Firefly Aviation Ltd.s Attribute_Value_Accuracy_Information: Attribute_Value_Accuracy: 0.01 nT Attribute: Attribute_Label: magfinal Attribute_Definition: leveled, igrf-corrected total-field magnetic (nT), total field magnetic constant applied back into data Attribute_Definition_Source: Firefly Aviation Ltd. Attribute_Value_Accuracy_Information: Attribute_Value_Accuracy: 0.01 nT Distribution_Information: Distributor: U.S. Geological Survey Contact_Information: Contact_Person_Primary: Contact_Person: Victoria Langenheim Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: 345 Middlefield Rd, MS 989 City: Menlo Park State_or_Province: CA Postal_Code: 94025 Country: USA Contact_Voice_Telephone: 650-329-5313 Contact_Electronic_Mail_Address: zulanger@usgs.gov Resource_Description: Downloadable Data Distribution_Liability: This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, firm, or product 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 Transfer_Size: 639000000 Network_Resource_Name: http://dx.doi.org/10.3133/ofr20151186 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_address: Network_resource_name: http://dx.doi.org/10.3133/ofr20151186 Fees: None Metadata_Reference_Information: Metadata_Date: 20150517 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Victoria Langenheim Contact_Organization: U.S. Geological Survey Contact_Position: geophysicist Contact_Address: Address_Type: mailing and physical address Address: 345 Middlefield Rd. City: Menlo Park State_or_Province: CA Postal_Code: 94025 Contact_Voice_Telephone: 650-329-5313 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