m.region.ll(1)	       Grass User's Manual	   m.region.ll(1)



NNAAMMEE
       mm..rreeggiioonn..llll   -	Converts  Universal  Transverse  Mercator
       (UTM) coordinates falling within  the  current  geographic
       region from UTM coordinates to geographic (latitude/longi-
       tude) coordinates.
       _(_G_R_A_S_S _D_a_t_a _I_m_p_o_r_t_/_P_r_o_c_e_s_s_i_n_g_)

SSYYNNOOPPSSIISS
       mm..rreeggiioonn..llll
       mm..rreeggiioonn..llll hheellpp
       mm..rreeggiioonn..llll sspphheerrooiidd==_n_a_m_e

DDEESSCCRRIIPPTTIIOONN
       _m_._r_e_g_i_o_n_._l_l takes current geographic  region  settings  in
       UTM  coordinates,  and converts them to geographic coordi-
       nates (i.e., latitudes and longitudes).	 It  also  prints
       the  length  (in  meters) of one arc-second at each of the
       four edges of the geographic region.  The user must  enter
       the  spheroid  upon  which  to base the geographic coordi-
       nates.


       The list of spheroids available is somewhat  dynamic.   It
       may  not contain exactly the ones listed below.	To deter-
       mine the current list of possible spheroids,  simply  type
       in: mm..rreeggiioonn..llll hheellpp

       A  list	of  available  spheroids  will	be printed on the
       screen.

   AAVVAAIILLAABBLLEE SSPPHHEERROOIIDDSS
       (The on-line listing includes only the spheroid names.)

       Spheroid: Semi-major	 axis	  Eccentricity	     sqrd
       (e),   Commonly used for:
		 (Equatorial Radius) Flattening (f),
		 (a): or Polar Radius (b):
       _
       airy	      a=6377563.396 e=.006670540
       australian     a=6378160     f=1/298.25	    Australia
       bessel	      a=6377397.155 e=.006674372	 Japan
       clark66	      a=6378206.4   b=6356583.8 	 N. Amer-
       ica
       everest	       a=6377276.345  e=.0066378466	   India,
       Burma
       grs80	      a=6378137     f=1/298.257
       hayford	      a=6378388     f=1/297
       international  a=6378388     f=1/297		 Europe
       krasovsky      a=6378245     f=1/298.3
       wgs66		a=6378145	f=1/298.25	worldwide
       coverage
       wgs72		a=6378135	f=1/298.26	worldwide
       coverage
       wgs84						a=6378137
       f=1/298.257223563	 worldwide coverage


EEXXAAMMPPLLEE
       mm..rreeggiioonn..llll sspphheerrooiidd==_c_l_a_r_k_6_6

       Results:

       WINDOW 4928000.00N 609000.00E ZONE 13
	      4914000.00S 590000.00W

	     44.30.06N 44.29.57N
	    103.52.04W 103.37.44W

	     44.22.32N 44.22.23N
	    103.52.13W 103.37.55W

	    At northern edge 1 arc-second longitude=22.088500m

	    At southern edge 1 arc-second longitude=22.135998m

	    At western edge 1 arc-second latitude=30.860285m

	    At eastern edge 1 arc-second latitude=30.863082m

       The values for the geographic coordinates are  rounded  to
       the  nearest  second in this example.   They would be more
       precise in the  actual  output  that  is  printed  on  the
       screen.

SSEEEE AALLSSOO
       _m_._d_a_t_u_m_._s_h_i_f_t

       _m_._l_l_2_u

       _m_._u_2_l_l

       _r_._i_n_._l_l

AAUUTTHHOORR
       Michael	 Shapiro,   U.S.Army   Construction   Engineering
       Research Laboratory

       _L_a_s_t _c_h_a_n_g_e_d_: _$_D_a_t_e_: _2_0_0_2_/_0_1_/_2_5 _0_5_:_4_5_:_3_3 _$



GRASS 5.0					   m.region.ll(1)
