LCC_1SP

 Projection     : Lambert Conformal Conic (1 Standard Parallel)
 General class  : conic
 Characteristics: conformal
                : rectangular coordinates (U.S.A.; France)
 Earth model    : ellipsoid or sphere

Defining the MAPUNITS:

 MapUnits "lcc_1sp"      ! Standard name
 MapUnits "lcc_1sp e0"   ! Standard name and ellipsoid

Other parameters:

 TrueOriginLongitude "central_meridian"       ! Required, for True origin
 TrueOriginLatitude  "latitude_of_origin"     ! Required, for True origin
 Scale               "scale_at_center"        ! Optional, default is one
 FalseEasting        "false_easting"          ! Optional, default is zero
 FalseNorthing       "false_northing"         ! Optional, default is zero

LCC_1SP uses one Standard Parallel and a Scale factor. (Actually it uses the Latitude of Origin as the one Standard Parallel.) Whereas LCC uses two Standard Parallels and a Latitude of Origin (and no Scale factor).

Possible errors:

 E332, "Equal latitudes for st. parallels on opposite sides of 
        equator" - Error occurred in initializing the projection
 E334, "Point cannot be projected" - In converting from 
        geographic coordinates to projection coordinates, the 
        point projects into infinity