Metadata: Identification_Information: Citation: Citation_Information: Originator: Morin, R.L. Publication_Date: 2002 Title: Isostatic gravity map of Yukon Flats, east-central Alaska Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: 02-322 Publication_Information: Publication_Place: Menlo Park, California Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/of/2002/0322/ Description: Abstract: An isostatic gravity map of Yukon Flats at a scale of 1:500,000 was prepared using all know publicly available gravity data. The data were gridded at 0.25 x 0.25 km interval and contoured at 5 mGal interval. The principal facts (gravity measurements and supporting survey data) are provided along with the printable map. Purpose: This map was produced to examine gravity anomalies associated with sedimentary basins in the area. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2002 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: none planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -152.000 East_Bounding_Coordinate: -141.000 North_Bounding_Coordinate: 68.000 South_Bounding_Coordinate: 65.000 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: geophysics Theme_Keyword: isostatic anomaly Theme_Keyword: geospatial datasets Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Categories Theme_Keyword: geoscientificInformation Place: Place_Keyword_Thesaurus: none Place_Keyword: Yukon Flats Place_Keyword: Alaska Place: Place_Keyword_Thesaurus: Augmented FIPS 10-4 and FIPS 6-4 Place_Keyword: f02290 = Yukon-Koyukuk Place_Keyword: f02240 = Southeast Fairbanks Place_Keyword: f02090 = Fairbanks North Star Access_Constraints: none Use_Constraints: none Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Robert L. Morin 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: U.S.A. Contact_Voice_Telephone: 650-329-5320 Contact_Electronic_Mail_Address: morin@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: http://geo-nsdi.er.usgs.gov/metadata/open-file/02-322/browse.png Browse_Graphic_File_Description: Reduced-size image of the map sheet, 725x483 pixels, 114k bytes Browse_Graphic_File_Type: PNG Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/of/2002/0322/pdf/of02-322.pdf Browse_Graphic_File_Description: Printable version of the map sheet, 1.5 megabytes Browse_Graphic_File_Type: PDF Native_Data_Set_Environment: SUN Ultra4000, UNIX platform Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Observed gravity data are accurate to about 0.05 milligals. Logical_Consistency_Report: Gravity anomalies were visually checked and reviewed at a scale of 1:500,000. This map was produced to be used at a map scale of 1:500,000. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Accuracy of the data is about 18 m. Lineage: Process_Step: Process_Description: The gravity data used to make this map were collected between 1959 and 1984. The data were collected by automobile, aircraft, and watercraft. Most of the data were collected as part of a U.S. Geological Survey (USGS) regional gravity data collection project. Some of the data were collected as part of other USGS local projects. One data set was collected by the NGS (National Geodetic Survey). Process_Date: 1959 to 1984 Process_Step: Process_Description: data reviewed Process_Date: 2001 to 2002 Process_Step: Process_Description: Creation of original metadata record Process_Date: 20030806 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Robert Morin Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: USGS Address: 345 Middlefield Road MS 989 City: Menlo Park State_or_Province: CA Postal_Code: 94025 Country: USA Contact_Voice_Telephone: 650-329-5320 Contact_Electronic_Mail_Address: morin@usgs.gov Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: point Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.01 minute Longitude_Resolution: 0.01 minute Geographic_Coordinate_Units: Degrees and decimal minutes Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.4 Denominator_of_Flattening_Ratio: 294.98 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Datum_Name: National Geodetic Vertical Datum of 1929 (NGVD29) Altitude_Resolution: 0.1 Altitude_Distance_Units: feet Altitude_Encoding_Method: attribute values Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: table1.doc Entity_Type_Definition: Principal facts (gravity observations) Attribute: Attribute_Label: (stname) Attribute_Definition: station identifier (text, 4 characters) Attribute_Domain_Values: Unrepresentable_Domain: identifier without scientific significance Attribute: Attribute_Label: auxname Attribute_Definition: (text, 4 characters) Attribute_Domain_Values: Unrepresentable_Domain: identifier without scientific significance Attribute: Attribute_Label: latdeg Attribute_Definition: degrees of latitude (integer) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 64 Range_Domain_Maximum: 67 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Enumerated_Domain_Value_Definition: no data Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: @ Enumerated_Domain_Value_Definition: Elevation from nearby bench marks Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: $ Enumerated_Domain_Value_Definition: Elevation from differential GPS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: % Enumerated_Domain_Value_Definition: Elevation from GPS Attribute: Attribute_Label: sbaacc Attribute_Definition: simple bouguer anomaly accuracy code Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 1 Enumerated_Domain_Value_Definition: gravity anomaly accuracy, milligals 0.01 Local surveys with special gravity meters and leveling Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 2 Enumerated_Domain_Value_Definition: gravity anomaly accuracy, milligals 0.02 Multiple readings with LaCoste & Romberg meters on hard, surveyed surfaces Attribute_Domain_Values: 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Enumerated_Domain: Enumerated_Domain_Value: 7 Enumerated_Domain_Value_Definition: gravity anomaly accuracy, milligals 1.0 Most surveys based on reasonable altimetry Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 8 Enumerated_Domain_Value_Definition: gravity anomaly accuracy, milligals 2.0 Data using moderate-distance altimetry in variable weather or spot elevations on 100-ft contour interval maps Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 9 Enumerated_Domain_Value_Definition: gravity anomaly accuracy, milligals 5.0 Data using long-range altimetry in bad weather or contour interpolation on 200-ft contour interval maps Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 0 Enumerated_Domain_Value_Definition: gravity anomaly accuracy, milligals >5.0 Data from surveys using long-distance altimetry or altimetry with control failures or errors or some 500-ft contour interval reconnaissance maps Attribute: Attribute_Label: faa 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