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
		   Interpretation of Seismic Refraction Data (Plate 4)
               Depth to Bedrock from Seismic Refraction Data.  
               Contour interval = varies (feet)

Type of GIS data: ArcView Shape files (5)
Shape File Names: axismaxdepth, dpthmeso, dpthspot, dpthtert, srprof
		
Theme Key Words:  Magnetic basement depth, Dixie Valley, Nevada
Geographic Area:  Dixie Valley, Nevada, USA
Spatial Object Types: Line, point
Intended Scale(s) of Use: ~1:62,500 or smaller 
Data Resolution:   N/A
Reference: Koenig, J. B., R. W. Greensfelder, and C. W. Klein, 1976, Geothermal Potential of the Quest Leasehold, 
	   Dixie Valley, Nevada; Depth to Bedrock from seismic refraction Data, Dixie Valley, Nevada, 
	   GeothermEx, Inc., Plate 4/5

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:  ~1:62,500 (1cm:625 m)
Source Projection:   Geographic coordinates = latitude/longitude
Source Geoid:  Unknown - assumed to be Clarke 1866
Source Datum:  Unknown - assumed to be NAD 27
Source Units:  decimal degrees
Source Other Projection Parameters:  None
Source Reference:  Meister, L.J., 1967, Seismic refraction study of Dixie Valley, Nevada: in
			Geophysical study of Basin-Range structure, Dixie Valley Region, Nevada,
			Air Force Cambridge Research Lab., Report No. 66-848, Part 1. 

TABLE ATTRIBUTES
Coverage name:         axismaxdepth
  Attribute Field:       description
    Attribute Type:        line attributes
    Attribute Explanation: Approximate axis of maximum depth to basement (based
                           on gravity and aeromagnetic data)
    Attribute Definition:  character, 128 wide
    Attribute Source:      Above referenced map
    Attribute Reference:   Above referenced map

Coverage name:         dpthmeso
  Attribute Field:       depth_feet
    Attribute Type:        line attributes
    Attribute Explanation: Depth contour to 14,000 - 16,000 ft/sec horizon
    Attribute Definition:  integer, 6 wide
    Attribute Source:      Above referenced map
    Attribute Reference:   Above referenced map

Coverage name:         dpthspot
  Attribute Field:       depth_tert
    Attribute Type:        point attributes
    Attribute Explanation: Depth to top of 10,000 ft/sec horizon, probably late 
                           Tertiary and Pleistocene volcanics
    Attribute Definition:  character, 8 wide
    Attribute Source:      Above referenced map
    Attribute Reference:   Above referenced map
  Attribute Field:       depth_meso
    Attribute Type:        point attributes
    Attribute Explanation: Depth to 14,000 to 16,000 ft/sec horizon, probably 
                           Mesozoic basement
    Attribute Definition:  character, 8 wide
    Attribute Source:      Above referenced map
    Attribute Reference:   Above referenced map
  Attribute Field:       label
    Attribute Type:        point attributes
    Attribute Explanation: Character label for use in map making in the format
                           of depth_tert/depth_meso.  This is the way these
                           values were displayed on the source map.
                           Example:  2000/3000+
    Attribute Definition:  character, 8 wide
    Attribute Source:      Above referenced map
    Attribute Reference:   Above referenced map

Coverage name:         dpthtert
  Attribute Field:       depth_feet
    Attribute Type:        line attributes
    Attribute Explanation: Depth contour to top of 10,000 ft/sec horizon
    Attribute Definition:  integer, 6 wide
    Attribute Source:      Above referenced map
    Attribute Reference:   Above referenced map

Coverage name:         srprof
  Attribute Field:       profile_no
    Attribute Type:        line attributes
    Attribute Explanation: Seismic refraction profile identification number.
    Attribute Definition:  integer, 3 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:  17.2 KB
Archives Size: 9.8 KB

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

STATUS INFORMATION
Completion Status:  Completed
Completion Date:  October 5, 1997
Geographic Area Completed:  Dixie Valley, Nevada
Update Frequency:  Not updated since completion
Release Information:  Not proprietary

ACCURACY INFORMATION
RMS Error:  0.006
Accuracy Checked: yes
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