FILE: gis83prj.dgn                DOCUMENTATION REVISION       April 15, 1998      

Define Coordinate System

     System: Lambert Conformal Conic
          Parameters:    
               Longitude of Origin- -93:30:00.000000 d:m:s
               Latitude of Origin-     40:00:00.000000 d:m:s
               Standard Parallel 1-    40:22:30.000000 d:m:s
               Standard Parallel 2-    43:37:30.000000 d:m:s 
               False Easting              189.393939 mi
               False Northing            0.000000 mi
     
     Geodetic Datum: North American 1983

     Ellipsoid: GRS80
          Parameters:
               Equaterial Radius- 3963.190592 mi
               Polar Radius-         3949.902764mi
               Eccentricity-          0.0818191910428158
               Flattening-             0.00335281068118232
               Flattening Inverse- 298.257222101


     Units and Formats
          Geographic
               Units                    Format
                 D:m:s               Lonitude,Latitude
               Precision                                  6
                 1.0 e-6             Postive N,E
          Projection
               Units                    Format
                 Mi                  Easting,Northing
               Precision
                 1.0 e-6
          Height
               Units                    Format
                 Ft                  Off Display Height
               Precision
                 1.0 e-6
          Geocentric     
               Units
                 Mi           
               Precision
                 1.0 e-6
          Distance
               Units
                 Mi
               Precision
                 1.0 e-6
          Angular
               Units
                 Deg
               Precision
                 1.0 e-6
     Description:   


     Vertical Datum and Heights:   
          North American Vertical Datum 1988 

          Height Type
            Orthometer                          
          Undulation Model
            GEOID93

          Average Undulation


     Sperical Model
          Equatorial

          Parameters:
               Radius- 3963.190592 mi
               
     Greenwich Offset:
          0:00:00.000000 d:m:s

Datum Transformation:
     Model:
          NADCOM NAD83 to HARN(NGS Version 2.10)

     Parameters:
          Transfer Direction:
               NAD83 to HARN




Working Units:
     Mapping:
          Define Mapping Working Units:
          Resolution:
               5280000.0000000000

     Range:
          Storage Minimum Point:
          x: -217.326449 mi
          y: -268.736279 mi

          Storage Center Point
          x: 189.393939 mi
          y: 137.984109 mi

          Storage Maximum Point
          x: 596.114327 mi
          y: 544.704497 mi

Paper Working Units:
     Resolution:
       5280000

     UOR's per mi
     Map Scale: 1:1

     Range:
          Storage Minimum Point
          x: -406.720388 mi
          y: -406.720388 mi
          
          Storage Center Point
          x: 0.000000 mi
          y: 0.000000 mi

          Storage Maximum Point
          x: 406.720388 mi
          y: 406.720388 mi








Define Secondary Coordinate System
     System: Geographic (Longitude, Latitude)
          Parameters:
               There are no parameters for this system

     Geodetic Datum: WGS84

     Ellipsoid: WGS84
          Parameters:
               Equatorial Radius: 6378137.000 m
               Polar Radius:         635652.314 m
               Eccentricity:           0.08181919084262115
               Flattening:              0.00335281066474746
               Flattening Inverse: 298.257223563002

     Vertical Datum and Heights
          Vertical Datum:          
               North American Vertical Datum 1988

          Height Type:
               Orthometric

          Undulation Model:
GEOID93

     Spherical Model
          Model Type:
               Equatorial

          Model Parameters:
               Radius: 6378137.000000 m

     Greenwich Offset
          0:00:00.000000 d:m:s