Southern California National Elevation Data (NED) Metadata

GEODATASET NAME: SCA_NEDA83

IDENTIFICATION INFORMATION

Description:
    Southern California Pilot Study Area elevation grid (NED).
Abstract:
    The National Elevation Dataset (NED) is a seamless mosaic of the 
    best-available, 30 meter, 7.5-minute elevation data for the conterminous 
    United States. NED has been processed to provide a much-improved base of 
    elevation data for calculating slope and hydrologic derivatives.
Data Type:
    Grid
Data Originator:
    U. S. Department of the Interior 
    U. S. Geological Survey 
    National Mapping Division 
    EROS Data Center 
    edcnts12.cr.usgs.gov/ned/About.htm    
Data Processor:
    Ed Evanson
    Lockheed Martin Environmental Services
    1050 E. Flamingo Road, Suite E120
    Las Vegas, NV 89119
    (702)897-3208
    eevanson@lmepo.com
Data Provider:
    Dan Heggem
    U.S. Environmental Protection Agency NERL
    P.O. Box 93478
    Las Vegas, NV 89193-3478
    (702)798-2278
    heggem.daniel@epa.gov
Keywords:
    Southern California, Pilot Study Area, National Elevation Dataset, NED
Version:
    N/A
Status:
    Interim
Revision Number:
    0
Series Name:                    
Online Link (URL):              
Time Period of Content:         
Use Constraints:
    None. Acknowledgment of the originating agencies would be appreciated in
    products derived from these data.                
Purpose:
    Southern California data browser
Date of metadata entry/update:
    1/22/2002
 
No Publication Information Available
No File Security Information Available
  
DATA QUALITY INFORMATION
 
Cloud Cover:
    Not applicable
Software:
    Arc/Info 7.2
Operating System:
    Unix
Path Name:
    /gis/wemap/sca/ned
Logical Consistency Report:
    Not presently available
Completeness Report:
    Not presently available
Horizontal Positional Accuracy:
    Not presently available
Vertical Positional Accuracy:
    Not presently available
Attribute Accuracy:
    Not presently available
Procedures:
    The National Elevation Dataset grids for Southern California were
    mosaiced and the output grid clipped to the Southern California boundary.
    The output grid was projected to region 9 Albers projection.  
Reviews Applied to Data    
    Lockheed Martin Environmental Services internal review
Related Spatial Data Files:
    All geodatasets with sca_ prefix.
Other References Cited:  
Notes:
Update Frequency:
    As needed
 
SPATIAL REFERENCE INFORMATION

                         Description of Grid sca_neda83
 
Cell Size =              30.000         Data Type:                   Integer
Number of Rows    =       10228           Number of Values =            3507
Number of Columns =       14816           Attribute Data (bytes) =         8
 
           BOUNDARY                                STATISTICS
 
Xmin =              -361026.879         Minimum Value =               -4.000
Xmax =                83453.121         Maximum Value =             3503.000
Ymin =              3351863.760         Mean          =              666.137
Ymax =              3658703.760         Standard Deviation =         575.926
 
                          COORDINATE SYSTEM DESCRIPTION
 
Projection               ALBERS
Datum                     NAD83
Zunits                   METERS
Units                    METERS             Spheroid                GRS1980
Parameters:
1st standard parallel                                   33 15  0.000
2nd standard parallel                                   40 15  0.000
central meridian                                       -116 45  0.00
latitude of projection's origin                          0  0  0.000
false easting (meters)                                       0.00000
false northing (meters)                                      0.00000

 
ENTITY AND ATTRIBUTE INFORMATION
Annotation Name:

ATTRIBUTE LISTING FOR: sca_neda83.vat

COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME     INDEXED?
    1  VALUE                  4    10     B      -                     Indexed
    5  COUNT                  4    10     B      -                        -

METADATA REFERENCE SECTION
 
FGDC Content Standards for Digital Geospatial Metadata
FGDC Standards Version 6/98 / metadata.aml ver. 1.3 5/21/99

SUPPLEMENTAL METADATA (where available)

Abstract:  The U.S. Geological Survey has developed a National Elevation 
Dataset (NED). The NED is a seamless mosaic of best-available elevation data. 
The 7.5-minute elevation data for the conterminous United States are the 
primary initial source data. In addition to the availability of complete 
7.5-minute data, efficient processing methods were developed to filter 
production artifacts in the existing data, convert to the NAD83 datum, 
edge-match, and fill slivers of missing data at quadrangle seams. One of the 
effects of the NED processing steps is a much-improved base of elevation data 
for calculating slope and hydrologic derivatives.  

Purpose:  Geospatial elevation data are utilized by the scientific and 
resource management communities for global change research, hydrologic 
modeling, resource monitoring, mapping, and visualization applications. 
 
Distribution_Liability:  Although these data have been processed successfully 
on a computer system at the U.S. Geological Survey, EROS Data Center, no 
warranty expressed or implied is made by either regarding the utility of the 
data on any system, nor shall the act of distribution constitute any such 
warranty. The USGS will warrant the delivery of this product in 
computer-readable format and will offer appropriate adjustment of credit
when the product is determined unreadable by correctly adjusted computer 
peripherals, or when the physical medium is delivered in damaged condition. 
Requests for adjustments of credit must be made within 90 days from the date 
of this shipment from the ordering site.
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Southern California National Elevation Data (NED) Metadata

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