Identification_Information: Citation: Citation_Information: Originator: Rukstales, Kenneth S. Originator: Love, Jeffrey J. Publication_Date: 2007 Title: Declination Chart (Sheet 1 of 5) [coverage containing polygons and arcs, igrf2005ds] Edition: version 1.0 Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: U.S. Geological Survey Scientific Investigations Map Issue_Identification: 2964 Publication_Information: Publication_Place: Denver, Colorado Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/sim/2007/2964/ Larger_Work_Citation: Citation_Information: Originator: Rukstales, Kenneth S. Originator: Love, Jeffrey J. Publication_Date: 2007 Title: The International Geomagnetic Reference Field, 2005 Edition: version 1.0 Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: U.S. Geological Survey Scientific Investigations Map Issue_Identification: 2964 Publication_Information: Publication_Place: Denver, Colorado Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/sim/2007/2964/ Description: Abstract: This is one of five world charts showing the declination, inclination, horizontal intensity, vertical component, and total intensity of the Earth's magnetic field at mean sea level at the beginning of 2005. This particular data set is for the secular variation of declination of the Earth's magnetic field. The charts are based on the 10th generation International Geomagnetic Reference Field (IGRF-10) main model for 2005 and secular change model for 2005-2010. The IGRF is referenced to the World Geodetic System 1984 ellipsoid. Purpose: This map is intended to show the Earth's main magnetic field and its annual rate of change (secular variation) based on the 10th generation International Geomagnetic Reference Field (IGRF-10). The IGRF is a mathematical model of the Earth's main magnetic field and its secular variation based upon data from magnetic observatories and satellite magnetic missions. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 2005 Ending_Date: 2010 Currentness_Reference: The basis on which the time period of content information is determined. Status: Progress: Complete Maintenance_and_Update_Frequency: 5 years Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -180.000000 East_Bounding_Coordinate: 180.000000 North_Bounding_Coordinate: 90.000000 South_Bounding_Coordinate: -90.000000 Keywords: Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: IGRF Theme_Keyword: Geomagnetic Theme_Keyword: Geomagnetism Theme_Keyword: Magnetic Theme_Keyword: Declination Theme_Keyword: International Access_Constraints: None Use_Constraints: The data are for the years 2005 - 2010. Acknowledgment of the U.S. Geological Survey, Geomagnetism Program would be appreciated in products derived from these data. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Ken Rukstales Contact_Organization: U.S. Geological Survey - Geologic Hazards Team Contact_Address: Address_Type: mailing address Address: Box 25046, MS 966 City: Denver State_or_Province: Colorado Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 303-273-8677 Contact_Electronic_Mail_Address: rukstales@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/sim/2007/2964/2964-1.pdf Browse_Graphic_File_Description: Full-size, complete version of the declination chart of the International Geomagnetic Reference Field, 2005 Browse_Graphic_File_Type: PDF Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcGIS 9.1 Service Pack 2 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: This data set is based on a mathematical model of the the Earth's magnetic field. The accuracy of any magnetic field component attribute is dependent on the model's ability to calculate the Earth's magnetic field at any location on Earth. Logical_Consistency_Report: Polygon and chain-node topology are present. Completeness_Report: A circular void of diameter 0.75 degrees was created around the north and south magnetic poles to avoid any problems that these singularities present when calculating and contouring the magnetic field near these locations. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The location of features is based on a mathematical model of the Earth's magnetic field. The location of each point is considered to be correct within the confines of computer accuracy. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: The data are computed at mean sea level based on the mathematical model of the Earth's magnetic field. Lineage: Process_Step: Process_Description: The associated secular variation of declination, based on the 10th generation International Geomagnetic Reference Field, was calculated for a grid of points, having a latitude and longitude spacing of 0.1 degrees. The data were imported into a grid and contoured using ArcGIS. The desired contours for the map were selected and polygon and arc topology were ascertained as well as appropriate feature attributes. Process_Date: 2005 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Ken Rukstales Contact_Organization: U.S. Geological Survey - Geologic Hazards Team Contact_Address: Address_Type: mailing address Address: Box 25046, MS 966 City: Denver State_or_Province: Colorado Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 303-273-8677 Contact_Electronic_Mail_Address: rukstales@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: Complete chain Point_and_Vector_Object_Count: 1472 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Label point Point_and_Vector_Object_Count: 243 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains Point_and_Vector_Object_Count: 243 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 4 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.000003 Longitude_Resolution: 0.000003 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 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: igrf2005ds arc Entity_Type_Definition: Contours of the estimated rate of change of declination (secular variation) of the Earth's magnetic field based on the 10th generation International Geomagnetic Reference Field expressed in minutes of arc per year. To apply change, add algebraically. 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: FNODE# Attribute_Definition: Internal node number for the beginning of an arc (from-node). Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Whole numbers that are automatically generated. Attribute: Attribute_Label: TNODE# Attribute_Definition: Internal node number for the end of an arc (to-node). Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Whole numbers that are automatically generated. Attribute: Attribute_Label: LPOLY# Attribute_Definition: Internal node number for the left polygon. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Whole numbers that are automatically generated. Attribute: Attribute_Label: RPOLY# Attribute_Definition: Internal node number for the right polygon. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Whole numbers that are automatically generated. Attribute: Attribute_Label: LENGTH Attribute_Definition: Length of feature in internal units. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Attribute: Attribute_Label: IGRF2005DS# Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. 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variation) of the Earth's magnetic field based on the 10th generation International Geomagnetic Reference Field expressed in minutes of arc per year. 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Attribute: Attribute_Label: IGRF2005DS# 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: IGRF2005DS-ID Attribute_Definition: User-defined feature number. 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minutes of arc per year Enumerated_Domain_Value_Definition_Source: USGS Enumerated_Domain: Enumerated_Domain_Value: 90 Enumerated_Domain_Value_Definition: Secular variation of declination values within the polygon range from 90 to 21600 minutes of arc per year Enumerated_Domain_Value_Definition_Source: USGS Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: USGS Information Services Address: P.O. Box 25286, Mail Stop 306 City: Denver State_or_Province: Colorado Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 1-888-ASK-USGS Contact_Facsimile_Telephone: 303-202-4693 Contact_Electronic_Mail_Address: infoservices@usgs.gov Resource_Description: U.S. Geological Survey Scientific Investigations Map 2964 The International Geomagnetic Reference Field, 2005 Declination Chart Sheet 1 of 5 (Map-On-Demand) Distribution_Liability: Although these data have been used by the U.S. Geological Survey, no warranty, expressed or implied is made by the USGS to the accuracy of the data and related material nor shall the fact of distribution constitute any such warranty, and no responsibility is assumed by the USGS in connection therewith. Standard_Order_Process: Non-digital_Form: Available as one of five printed sheets. Order from USGS at the address listed above or see http://store.usgs.gov/mod/order.html for more ordering information. Fees: For current charges please see http://store.usgs.gov/mod/order.html Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: USGS, Denver Publishing Service Center Address: P.O. Box 25046, Mail Stop 902 City: Denver State_or_Province: Colorado Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 303-236-4845 Contact_Facsimile_Telephone: 303-236-6287 Contact_Electronic_Mail_Address: tpinto@usgs.gov Resource_Description: U.S. Geological Survey Scientific Investigations Map 2964 The International Geomagnetic Reference Field, 2005 Declination Chart Sheet 1 of 5 Distribution_Liability: Although these data have been used by the U.S. Geological Survey, no warranty, expressed or implied is made by the USGS to the accuracy of the data and related material nor shall the fact of distribution constitute any such warranty, and no responsibility is assumed by the USGS in connection therewith. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: PDF Format_Version_Number: version 6.0 Format_Specification: Adobe Portable Document Format Transfer_Size: 2.4 MB Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/sim/2007/2964/2964-1.pdf Fees: none Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: USGS, Denver Publishing Service Center Address: P.O. Box 25046, Mail Stop 902 City: Denver State_or_Province: Colorado Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 303-236-4845 Contact_Facsimile_Telephone: 303-236-6287 Contact_Electronic_Mail_Address: tpinto@usgs.gov Resource_Description: Downloadable geospatial data sets in ArcInfo export format are available. Distribution_Liability: Although these data have been used by the U.S. Geological Survey, no warranty, expressed or implied is made by the USGS to the accuracy of the data and related material nor shall the fact of distribution constitute any such warranty, and no responsibility is assumed by the USGS in connection therewith. 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