Point Gravity Anomaly Database Metadata



Welcome to the Office of Geomatics metadata for the Point Gravity Anomaly Database.

This metadata was written using the Content Standards for Digital Geospatial Metadata, June 8, 1994 version, and released by the Federal Geographic Data Committee.

1.0 Identification Information:
basic information about the data set.
2.0 Data Quality Information:
general assessment of the quality of the data set.
4.0 Spatial Reference Information:
description of the reference frame for and the means to encode the coordinates in the data set.
6.0 Distribution Information:
information about the distributor of and options for obtaining the data set
7.0 Metadata Reference Information:
information on the currentness of the metadata information, and the responsible party.

1.0 Identification Information:

1.1 Citation:
1.1.1 Originator: National Geospatial-Intelligence Agency
1.1.2 Publication Date: Not Applicable
1.1.4 Title: Point Gravity Anomaly (PGA) Database
1.1.6 Geospatial Data Presentation Form: database
1.1.8 Publication Information:
1.1.8.1 Publication Place: St. Louis, Missouri
1.1.8.2 Publisher: National Geospatial-Intelligence Agency
1.2 Description:
1.2.1 Abstract: The PGA data base contains gravity points with geographic coordinates, gravity observations, elevations, computed gravity anomalies, accuracies, and source numbers. The database has gravity data obtained from colleges and universities, oil companies, other government agencies, gravity libraries, and NGA surveys.
1.2.2 Purpose: The PGA database satisfies requirements for geodetic and geophysical products as needed.
1.3 Time Period of Content:
1.3.1 Range of Dates/Times: 1965 to present
1.3.2 Currentness Reference: survey date
1.4 Status:
1.4.1 Progress: In Work
1.4.2 Maintenance and Update Frequency: Continually
1.5 Spatial Domain:
1.5.1 Bounding Coordinates:
1.5.1.1 West Bounding Coordinate: -180 degrees
1.5.1.2 East Bounding Coordinate: 180 degrees
1.5.1.3 North Bounding Coordinate: 90 degrees
1.5.1.4 South Bounding Coordinate: -90 degrees
1.6 Keywords:
1.6.1 Theme:
1.6.1.1 Theme Keyword Thesaurus: DoD Glossary of Mapping, Charting, and Geodetic Terms
1.6.1.2 Theme Keyword: Gravity, Gravity Anomaly, Free Air Anomaly, Bouguer Anomalies, Gravity Data
1.7 Access Constraints: All requests for this data must be made to the National Geospatial-Intelligence Agency, which is the sole authorized distributor.
1.8 Use Constraints: Users may not redistribute the data to other parties without express permission.
1.9 Points of Contact:
1.9.2 Contact Organization Primary:
1.9.2.1 Contact Organization: NGA Geospatial Sciences Division
1.9.2.2 Contact Person: Physical Geodesy Program Manager
1.9.3 Contact Position: Program Manager
1.9.4 Contact Address:
1.9.4.1 Address Type: mailing address
1.9.4.2 Address: 3838 Vogel Road L-41
1.9.4.3 City: St. Louis
1.9.4.4 State or Province: Missouri
1.9.4.5 Postal Code: 63010-6238
1.9.4.6 Country: United States of America
1.9.5 Contact Voice Telephone: (314) 676-4239 or DSN 846-4239
1.9.7 Contact Facsimile Telephone: (314) 676-4432 or DSN 676-4432
1.9.8 Contact Electronic Mail: gandg@nga.mil
1.9.9 Hours of Service: 0900-1500 Mon to Fri (Central Time)
1.11 Data Set Credit: NGA Geospatial Sciences Division has built this database over the last 30 years. Data has come from colleges and universities, oil companies, other Government agencies, and various surveys.
1.12 Security Information:
1.12.1 Security Classification System: Department of Defense and Legal Restrictions
1.12.2 Security Classification: Some data restricted
1.12.3 Security Handling Description: Unclassified data can be released, usually on an exchange basis outside of the DoD. All data can be used within DoD with some limitations.
1.13 Native Data Set Environment: Currently on an UNIX-based IBM RISC6000.
1.14 Cross Reference: Author Index File.

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2.0 Data Quality Information:

2.1 Attribute Accuracy:
2.1.1 Attribute Accuracy Report: The data accuracy varies and is coded.
2.2 Logical Consistency Report: Visual examination of plots; automated comparison of points; statistical analysis; edit checks
2.3 Completeness Report: Data available for most areas of the world.
2.4 Positional Accuracy:
2.4.1 Horizontal Positional Accuracy:
2.4.1.1 Horizontal Positional Accuracy Report: variable
2.4.2 Vertical Positional Accuracy:
2.4.2.1 Vertical Positional Accuracy Report: variable

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4.0 Spatial Reference Information

4.1 Horizontal Coordinate System Definition:
4.1.1 Geographic:
4.1.1.1 Latitude Resolution: random point data
4.1.1.2 Longitude Resolution: random point data
4.1.1.3 Geographic Coordinate Units: degrees and decimal minutes

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6.0 Distribution Information:

6.1 Distributor:
6.1.2 Contact Organization Primary:
6.1.2.1 Contact Organization: NGA Geospatial Sciences Division
6.1.2.2 Contact Person: Point Gravity Anomaly Lead Geodesist
6.1.3 Contact Position: Geodesist
6.1.4 Contact Address:
6.1.4.1 Address Type: mailing address
6.1.4.2 Address: 3838 Vogel Road L-41
6.1.4.3 City: St. Louis
6.1.4.4 State or Province: Missouri
6.1.4.5 Postal Code: 63010-6238
6.1.4.6 Country: United States of America
6.1.5 Contact Voice Telephone: (314) 676-4239 or DSN 846-4239
6.1.7 Contact Facsimile Telephone: (314) 676-4432 or DSN 846-4432
6.1.8 Contact Electronic Mail: gandg@sc.nga.mil
6.1.9 Hours of Service: 0900-1500 Mon to Fri (Central Time)
6.2 Resource Description: Gravity Data
6.4 Standard Order Process:
6.4.1 Non-Digital: Write or Phone
6.4.2 Digital Form:
6.4.2.1 Digital Transfer Information:
6.4.2.1.1 Format Name: ASCII
6.4.2.1.3 Format Version Date: 1994
6.4.2.2 Digital Transfer Option:
6.4.2.2.2 Offline Option:
6.4.2.2.2.1 Offline Media: 3 1/2 inch floppy disk
6.4.3 Fees: Data Exchange outside DoD.
6.4.5 Turnaround: Two to Four Weeks
6.5 Custom Order Process: Customers must contact the Identification Information Section Point of Contact.

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7.0 Metadata Reference Information:

7.1 Metadata Date: 1 December 1995
7.2 Metadata Review Date: 1 March 1998
7.3 Metadata Future Review Date: 1 March 1999
7.4 Metadata Contact:
7.4.1 Contact Person Primary:
7.4.1.1 Contact Person: Physical Geodesy Program Manager
7.4.1.2 Contact Organization: NGA Geospatial Sciences Division
7.4.3 Contact Position: Geodesist
7.4.4 Contact Address:
7.4.4.1 Address Type: mailing address
7.4.4.2 Address: 3838 Vogel Road L-41
7.4.4.3 City: St. Louis
7.4.4.4 State or Province: Missouri
7.4.4.5 Postal Code: 63010-6238
7.4.4.6 Country: United States of America
7.4.5 Contact Voice Telephone: (314)676-4239 or DSN846-4239
7.4.7 Contact Facsimile Telephone: (314)676-4432 or DSN846-4432
7.4.8 Contact Electronic Mail: gandg@nga.mil
7.4.9 Hours of Service: 0900-1500 Mon to Fri (Central Time)
7.5 Metadata Standard Name: FGDC Content Standards for Digital Geospatial Metadata
7.6 Metadata Standard Version: June 8, 1994
7.10 Metadata Security Information:
7.10.1 Metadata Security Classification System: Department of Defense
7.10.2 Metadata Security Classification: Unclassified
7.10.3 Metadata Security Handling Description: Not Applicable

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Point of Contact: Office of Geomatics / Geosciences Division
phone (314) 676-9123, DSN 846-9123
gandg@nga.mil

Document last modified September 15, 2014

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