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/longitude) 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 coordi-
       nates, and converts them to geographic coordinates (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 coordinates.


       The  list  of spheroids available is somewhat dynamic.  It may not con-
       tain exactly the ones listed below.  To determine 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. America
       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 cover-
       age


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 out-
       put 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)
