BTS_impt.sh reformats and projects lat/lon data using the PROJ4 software
available from kai.er.usgs.gov .
  The current proj command:
    proj +proj=lcc +lon_0=96w +lat_1=20n +lat2=60n +lat_0=40n +ellps=clrk66 -r

  shows that the data is being projected to Lambert Conformal Conic,
  1st standard parallel: 20N, 2nd parallel at 60N, with lat_0 at 40N. 
  lon_0 is at 96W and the ellipsoid is clark66. These projection/parameters
  work well for the 50 states.

The program must be run while GRASS is operating because of the requirement to
use GRASS commands to build the final binary vector layer.

###############################################################################

The DEFAULT_WIND (under $LOCATION) looks as follows. Reconstructing this
under a location name and a PERMANENT mapset duplicates GRASS's location
and mapset construction steps.
proj:       99
zone:       0
north:      5600000
south:      -3400000
east:       4550000
west:       -6400000
cols:       3650
rows:       3000
e-w resol:  3000
n-s resol:  3000

###############################################################################

These PROJ files may be constructed and placed by g.setproj under $LOCATION 
  (which is /your/directory/path/yourlocationname/yourmapsetname).

::::::::::::::
PROJ_INFO
::::::::::::::
name: Lambert Conformal Conic
proj: lcc
ellps: clark66
a: 6378206.4000000004
es: 0.0067686580
lat_0: 40.0000000000
lon_0: -96.0000000000
lat_1: 20.0000000000
lat_2: 60.0000000000

###############################################################################

::::::::::::::
PROJ_UNITS
::::::::::::::
unit: meter
units: meters

###############################################################################

Rick Thompson
3/7/97
E-mail: rickt@erols.com or
	RThompso@Arl.WyleLabs.com