Bouguer Gravity Anomalies of New Jersey (1 milligal interval)

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Suhas L. Ghatge, N.J. Geological Survey
Publication_Date: 20040503
Publication_Time: Unknown
Title: Bouguer Gravity Anomalies of New Jersey (1 milligal interval)
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: NJGS Digital Geodata Series
Issue_Identification: NJGS DGS04-2
Publication_Information:
Publication_Place: Trenton, New Jersey
Publisher: NJDEP, New Jersey Geological Survey
Online_Linkage: http://www.state.nj.us/dep/njgs/geodata/
Description:
Abstract:
Gravity anomalies are produced by density variations within the rocks of the Earth's crust and upper mantle. Mapping of these density variations is the primary use of gravity anomalies.

Bouguer Anomalies of New Jersey is a GIS shapefile of bouguer gravity contours (lines) at 1 milligal intervals. The contours are based on gravity data in New Jersey and vicinity. The New Jersey contours were clipped at the state outline.The bouguer anomalies in New Jersey range from a low of -58 milligals to a high of +37milligals.

Purpose:
To provide information on the gravity values in New Jersey and useful for geologic interpretations.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: unknown
Currentness_Reference: publication date
Status:
Progress: In work
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -75.545116
East_Bounding_Coordinate: -73.942411
North_Bounding_Coordinate: 41.183392
South_Bounding_Coordinate: 39.46399
Keywords:
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: Bouguer
Theme_Keyword: anomalies
Theme_Keyword: gravity
Theme_Keyword: milligal
Theme_Keyword: contours
Place:
Place_Keyword: New Jersey
Access_Constraints: None
Use_Constraints:
New Jersey Department of Environmental Protection (NJDEP),  Data Distribution Agreement

I. Description of Data to be Provided. The Data provided herein are distributed subject to the following conditions and restrictions. SUBJECT DATA LAYERS For all data contained herein, NJDEP makes no representations of any kind, including, but not limited to, the warranties of merchantability or fitness for a particular use, nor are any such warranties to be implied with respect to the digital data layers furnished hereunder. NJDEP assumes no responsibility to maintain them in any manner or form.

II. Terms of Agreement 1. Digital data received from the NJDEP are to be used solely for internal purposes in the conduct of daily affairs.

2. The data are provided, as is, without warranty of any kind and the user is responsible for understanding the accuracy limitations of all digital data layers provided herein, as documented in the accompanying cross-reference files (see Section 1.14 CROSS_REFERENCE). Any reproduction or manipulation of the above data must ensure that the coordinate reference system remains intact.

3. Digital data received from the NJDEP may not be reproduced or redistributed for use by anyone without first obtaining written permission from the NJDEP. This clause is not intended to restrict distribution of printed mapped information produced from the digital data.

4. Any maps, publications, reports, or other documents produced as a result of this project that utilize NJDEP digital data will credit the NJDEP's Geographic Information System (GIS) as the source of the data with the following credit/disclaimer: "This (map/publication/report) was developed using New Jersey Department of Environmental Protection Geographic Information System digital data, but this secondary product has not been verified by NJDEP and is not state-authorized."

5. Users shall require any independent contractor, hired to undertake work that will utilize digital data obtained from the NJDEP, to agree not to use, reproduce, or redistribute NJDEP GIS data. Data utilized by an independent contractor will be required to be returned to the original user at the close of such contractual work. Users hereby agree to abide by the use and reproduction conditions specified above and agree to hold any independent contractor to the same terms.  By using data provided herein,  the user acknowledges that terms and conditions have been read and that the user is bound by these criteria.

Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Suhas L. Ghatge
Contact_Organization: NJDEP, New Jersey Geological Survey
Contact_Address:
Address_Type: mailing and physical address
Address: 29 Arctic Parkway, Box 427
City: Trenton
State_or_Province: New Jersey
Postal_Code: 08625
Country: USA
Contact_Voice_Telephone: (609)-292-1185
Contact_Facsimile_Telephone: (609)633-1004
Contact_Electronic_Mail_Address: Suhas.Ghatge@dep.state.nj.us
Security_Information:
Security_Classification: Unclassified
Native_Data_Set_Environment:
Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 8.3.0.800
Cross_Reference:
Citation_Information:
Originator: Suhas L. Ghatge, N.J. Geological Survey, NJDEP
Publication_Date: 03032004
Title: Bouguer Gravity Anomaly Map of New Jersey and Vicinity
Series_Information:
Series_Name: NJGS Open File Map
Issue_Identification: OFM 55
Publication_Information:
Publication_Place: Trenton, New Jersey
Publisher: N. J. Geological Survey, NJDEP
Online_Linkage: <http://www.state.nj.us/dep/njgs/pricelst/ofmap/ofm55.pdf>

Data_Quality_Information:
Lineage:
Source_Information:
Type_of_Source_Media: paper
Source_Contribution:
Data Sources:

Bolla, W. O., Gravity Survey of Princeton-New Brunswick Area, New Jersey, Princeton University, Survey Year 1962

Bond, K.R. and Daniels, D. L., Principal facts for the Gravity Stations in Hunterdon, Mercer, Monmouth and Somerset Counties, Central New Jersey, Open-File Report 86-0294, U. S. Geological Survey (USGS), Survey Year 1986

Bonini, W.E. and Woolard , G.P., 1957, Observational accuracy of high-range geodetic type Worden gravimeters: American Geophysical Union Transactions, v. 38.

Bothner, W. A., Brace, R. D., Gravity Data in Connecticut, Open-File Report 78-0804, University of New Hampshire, U. S. Geological Survey (USGS),Survey Year 1978

Delaware, Maryland and Virginia Gravity Survey, DMAH/TC, Survey Year 1969

Diment, W. H. and Urban T. C., Gravity Surveys in New York, New Jersey, and Pennsylvania, U. S. Geological Survey (USGS), Date Unlisted

Drake, Trip AN, Series CE, University of Wisconsin, Date Unlisted

Ghatge, S. L. and Hall, D. H., 1989, Geophysical investigations to determine bedrock topography in East Hanover-Morristown area, Morris County, New Jersey: N. J. Geological Survey Report 17.

Ghatge, S .L., 1990, Gravity investigations to delineate bedrock topography in portions of the south-central Passaic River Basin, New Jersey: N. J. Geological Survey unpublished data.

Ghatge, S. L. and Jagel, D.L., 1990, Gravity base station network of northern New Jersey: N. J. Geological Survey Open File Report OF 90-2.

Ghatge, S. L. and Hall, D.H., 1991, Bedrock topography of the Millburn-Springfield area, Essex and Union Counties, New Jersey: N. J. Geological Survey Map Series 91-4.

Ghatge, S. L., Jagel , D.L. and Herman, G.C., 1992, Gravity investigations to delineate subsurface geology in the Beemerville Intrusive Complex Area, Sussex County, New Jersey: N. J. Geological Survey Geologic Map Series 92-2.

Gravity Reductions in Pennsylvania, U. S. Geological Survey (USGS) Survey Year 1967

Gravity Data in the United States, North - South Profiles, DMAH/TC, Hawaii Institute of Geophysics (HIG), Survey Year 1967

Gravity Data Covering the North Eastern United States, National Geodetic Survey, U. S. Geological Survey (USGS), Date Unlisted

Gravity Data from Central and Southern Delaware, Delaware Geological Survey, Survey Year 1980

Greenland Gravity Observations, DMAH/TC, Survey Year 1962

Helicopter Gravity Measuring System Test Survey in Delaware, Maryland and Virginia, DMAH/TC, Survey Year 1968

Hersey, J. B., Trip CX, Series AE, University of Wisconsin, Survey Year 1941

Iverson, R. M., Trip CZ, Series I, University of Wisconsin, Survey Year 1955

Klewsaat, Darin, 1988, Residual Bouguer Gravity Anomalies in the Central Newark Basin: Implications for subsurface structure of Diabase Bodies: Rider College, New Jersey, unpublished Senior Thesis.

Koslowski, Final Analysis, Computation Report and Survey Data for U.S. East Coast Gravity Survey, DMAHTC/GSS, Survey Year 1984

Kucks, R. P., Principal Facts for a Gravity Survey within the Thiells Topographic Quadrangle, New York, Open-File Report 84-0481, U. S. Geological Survey (USGS), Survey Year 1984

Meier, D. R., 1949, Geophysical investigations in the Trenton-Old Bridge area, New Jersey: unpublished M.S. Thesis, Princeton University

National Gravimeter Base Network, National Oceanic and Atmospheric Administration (NOAA), Date Unlisted

National Gravity Base Net and Excenters, DMAHTC/GSS, Survey Year 1967

New Jersey Regional Gravity Survey, DMAH/TC, Survey Year 1969

New York Base Net, DMAH/TC, Survey Year 1968

New York Regional Gravity Survey and Secondary Gravity Base Net DMAH/TC, Survey Year 1970

NOAA/OES Absolute Gravity Base Stations, National Oceanic and Atmospheric Administration (NOAA), Survey Year 1992

Pennsylvania Regional Gravity Survey, DMAH/TC, Survey Year 1969

Reference Base Stations in the United States, DMAHTC/GSG, Survey Year 1979

Revetta, F., Gravity Survey of New York State, State University of New York at Buffalo, Survey Year 1975

Sabet, M. A., Eastern Shore of Maryland and Southern Delaware Gravity Data, Old Dominion University, Survey Year 1975

Sandberg, S. K. and others, 1996, Geophysical Investigation of the Potomac-Raritan-Magothy Aquifer System and Underlying Bedrock in Parts of Middlesex and Mercer Counties, New Jersey: N.J. Geological Survey Report GSR 37.

Sheridan, R.E., 1987 Project Buena 557, Rutgers University, New Jersey, unpublished data.

Steenland, N. C. and Woollard, G. P. , Gravity and Magnetic Investigation of the structure of the Cortland Complex, New York, Geological Society Of America, Survey Year 1952

Steenland, N.C. and, Woollard, G. P.,Trip AB, Series K, Woods Hole Oceanographic Institution (WHOI), Survey Year 1942

Sugarman, P. J., 1981, The geological interpretation of gravity anomalies in the vicinity of Raritan Bay, New Jersey and New York: unpublished M.S. Thesis University of Delaware.

Sumner, J. R., Meyer, R. F. ,Dunleavy J. M., Fleming, R. S., Principal Facts for Gravity Stations in the Newark-GettysburgTriassic Basin, New Jersey and Pennsylvania, Open-File Report 76-0302, U. S. Geological Survey (USGS), Survey Year 1978

The American Secondary Calibration Line, DMAH/TC, Survey Year 1967

Warfield, W.S., 1971 A gravity survey of the Beemerville area, Sussex County, New Jersey: Rider College, New Jersey, Junior Paper.

Whalen, C. T., BSD Gravity Survey, DMAH/TC, Survey Year 1966

Whalen, C. T., The Euro/African Secondary Calibration Line Survey, DMAH/TC, Survey Year 1965

Whalen, C. T., Extension of the Euro-African Calibration line, American Geophysical Union (AGU), Survey Year 1962

Wollard, G. P., Trip BK, Series JML, Unlisted, Date Unlisted

Woollard, G.P., The Gravity Meter as a Geodetic Instrument, Journal of Geophysical Research (JGR)

Woollard, G. P.,Trip AE, Series B, Princeton University, Survey Year 1939

Woollard, G . P. and Others, Trip VS, Series E, Princeton University, Survey Year 1947

World Wide Absolute Instrument Observed Gravity Records National Oceanic and Atmospheric Administration (NOAA), Date Unlisted

World Wide Excenter Station, National Oceanic and Atmospheric Administration (NOAA), Date Unlisted

Yersak, R.E., 1977, Gravity study of Staten Island and vicinity: New Brunswick, New Jersey, Rutgers University, unpublished Master Thesis.

Process_Step:
Process_Description:
Gravity measurements made on the surface of the Earth must be corrected in various ways before they can be made into an anomaly map. The free-air correction reduces the measurement to sea level by assuming that there is no intervening mass. The simple Bouguer correction accounts for the intervening mass as a uniform slab of constant density, and the complete Bouguer correction includes the effects of constant density topography within 166.7 km of the measurement location. A gravity reference field is subtracted from the corrected measurements to produce the free-air, simple Bouguer, or complete Bouguer anomaly.

Gravity data for New Jersey and vicinity obtained from the National Imagery and Mapping Agency, US Dept. of Defense and the New Jersey Geological Survey were reduced to obtain Bouguer gravity anomalies. The Bouguer anomaly values were gridded (kriging) and contoured. The contoured data were converted to DXF file format and exported to ESRI's ARCINFO line coverage. The line coverage was then converted to shape file using ESRI's ArcView 3.2. Each line was assigned a contour value in milligals. Then using the New Jersey state outline New Jersey contours were clipped from data from the surrounding states for this shape file.

Process_Date: 19991027
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Suhas L. Ghatge
Contact_Organization: NJ Geological Survey
Contact_Address:
Address_Type: mailing and physical address
Address: 29 Arctic Parkway, Box 427
City: Trenton
State_or_Province: New Jersey
Postal_Code: 08625
Country: USA
Contact_Voice_Telephone: (609)-292-1185
Contact_Facsimile_Telephone: (609)633-1004
Contact_Electronic_Mail_Address: Suhas.Ghatge@dep.state.nj.us

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 425

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: State Plane Coordinate System 1983
State_Plane_Coordinate_System:
SPCS_Zone_Identifier: 2900
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999900
Longitude_of_Central_Meridian: -74.500000
Latitude_of_Projection_Origin: 38.833333
False_Easting: 492125.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: .001024
Ordinate_Resolution: .001024
Planar_Distance_Units: survey feet
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222

Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: nj_grav1
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: Computer generated value
Attribute:
Attribute_Label: TNODE_
Attribute_Definition: Computer generated value
Attribute:
Attribute_Label: LPOLY_
Attribute_Definition: Computer generated value
Attribute:
Attribute_Label: RPOLY_
Attribute_Definition: Computer generated value
Attribute:
Attribute_Label: LENGTH
Attribute_Definition: length of line in feet
Attribute:
Attribute_Label: GRAV1_
Attribute_Definition: unique number
Attribute:
Attribute_Label: GRAV1_ID
Attribute_Definition: Unique number for each line
Attribute:
Attribute_Label: GRV_MGAL
Attribute_Definition: Gravity value in milligals

Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Suhas L. Ghatge
Contact_Organization: NJDEP, New Jersey Geological Survey
Contact_Address:
Address_Type: mailing and physical address
Address: 29 Arctic Parkway, Box 427
City: Trenton
State_or_Province: New Jersey
Postal_Code: 08625
Country: USA
Contact_Voice_Telephone: (609) 292-1185
Contact_Facsimile_Telephone: (609)633-1004
Contact_Electronic_Mail_Address: Suhas.Ghatge@dep.state.nj.us
Resource_Description: Downloadable Data
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Transfer_Size: 0.386

Metadata_Reference_Information:
Metadata_Date: 20040406
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Suhas L. Ghatge
Contact_Organization: NJDEP, New Jersey Geological Survey
Contact_Address:
Address_Type: mailing and physical address
Address: 29 Arctic Parkway, BOX 427
City: Trenton
State_or_Province: New Jersey
Postal_Code: 08625
Country: USA
Contact_Voice_Telephone: (609) 292-1185
Contact_Facsimile_Telephone: (609) 633-1004
Contact_Electronic_Mail_Address: Suhas.Ghatge@dep.state.nj.us
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

Generated by mp version 2.7.33 on Tue Apr 06 11:52:47 2004