METADATA
Geomatics Laboratory
Energy & Geoscience Institute
Department of Civil and Environmental Engineering
University of  Utah
423 Wakara Way, Suite 300
Salt Lake City, Utah 84108

IDENTIFICATION INFORMATION
Data Set Identity: Dixie Valley, Nevada
		   Simple Bouguer Gravity Map

Type of GIS data: ArcView Shape files (2)
Shape File Names: bg_cont, bg_obs_lines
		
Theme Key Words:  Simple Bouguer Gravity Map, Dixie Valley, Nevada
Geographic Area:  Dixie Valley, Nevada, USA
Spatial Object Types: Line
Intended Scale(s) of Use: ~1:250,000 or smaller 
Data Resolution:   N/A
EGI Reference: Greg Nash
Coordinate and Thematic Precision: Thematic=good in relation to the analog source map, 
				   coordinate=good in relation to analog base map,                                                                       however, no projection parameters were available.

FINAL PROJECTION INFORMATION
Projection Name:   UTM
Datum:  NAD 1927
Geoid:  Clarke 1866
Projection Units:  Meters
Other Projection Parameters:  UTM Zone 11
Map Extent:  Lower Left:  394,699.67mE; 4,387,216.64mN
	           Upper Right:  457,280.31mE; 4,442,504.69mN

SOURCE INFORMATION
Source Medium:   Analog (Paper)
Source Scale:  1:250,000 (1cm:2.5 km)
Source Projection:   Geographic coordinates = latitude/longitude
Source Geoid:   Unknown - assumed to be Clarke 1866
Source Datum:   Unknown - assumed to be NAD 1927
Source Units:   Km
Source Other Projection Parameters:  None
Source Reference:  Koenig, J. B., R. W. Greensfelder, and C. W. Klein, 1976, Geothermal Potential of the Quest Leasehold, 
	    Dixie Valley, Nevada; Aeromagnetic Map, Dixie Valley, Nevada, GeothermEx, Inc., Plate 9.

	From: Erwin, J.W.  1973, Bouguer gravity map of Nevada, Reno and Millet Sheets: Nevada Bureau of Mines and Geology,
	Open File Maps, scale 1:250,000.

TABLE ATTRIBUTES
Coverage name:         bg_cont
  Attribute Field:       value
    Attribute Type:        line attributes
    Attribute Explanation: Contour value of equal Bouguer anomaly, 5 mgal interval
    Attribute Definition:  integer, 5 wide
    Attribute Source:      Above referenced map
    Attribute Reference:   Above referenced map

  Attribute Field:       certainty
    Attribute Type:        line attributes
    Attribute Explanation: 1 = certain contour, 2 = uncertain contour
    Attribute Definition:  integer, 3 wide
    Attribute Source:      Above referenced map
    Attribute Reference:   Above referenced map

Coverage name:         bg_obs_lines
  Attribute Field:       obs_lines
    Attribute Type:        line attributes
    Attribute Explanation: Density of the number of observation stations per mile
    Attribute Definition:  character, 32 wide
    Attribute Source:      Above referenced map
    Attribute Reference:   Above referenced map


ACCESS INFORMATION
Tiling Scheme:  N/A
Native Format:  ArcInfo, Arcview
Transfer Mode: 
Native Size:  31 KB
Archives Size: 13 KB

DATA ORIGINATOR
Contact Person:  GIS Analyst, Greg Nash (801)585-9771
Alternate Contact: Geomatics Unit Leader- Greg Nash (801)585-3889
Contact Organization:  EGI
Contact E-mail:   ckesler@egi.utah.edu
Alternate E-mail:  gnash@egi.utah.edu

STATUS INFORMATION
Completion Status:  Completed
Completion Date:  October 21, 1997
Geographic Area Completed:  Dixie Valley, Nevada
Update Frequency:  Not updated since completion
Release Information:  Not proprietary

ACCURACY INFORMATION
RMS Error:  0.010
Accuracy Checked: As no projection parameter were available spatial accuracy is dubious.
Accuracy Information Source:  analog map
Spatial Accuracy: Good in relation to analog base map. As no projection parameter were 
		  available spatial accuracy is dubious. 
Thematic Accuracy:  Good - no errors found

DATA ARCHIVE INFORMATION
Digital Archive Location: www5.egi.utah.edu
Archive Data Type: pkzip file
Analog Archive: EGI