photo.init(1)	       Grass User's Manual	    photo.init(1)



_T_h_i_s  _i_s  _n_o_t  _a  _c_o_m_m_a_n_d  _i_t_s_e_l_f_,  _b_u_t  _a_n _o_p_t_i_o_n _o_f _t_h_e _c_o_m_m_a_n_d
_i_._o_r_t_h_o_._p_h_o_t_o

NNAAMMEE
       _p_h_o_t_o_._i_n_i_t - An imagery function that creates or  modifies
       the  optional entries in a camera initial exposure station
       file for an imagery group.
       _(_G_R_A_S_S _I_m_a_g_e _P_r_o_c_e_s_s_i_n_g _P_r_o_g_r_a_m_)

SSYYNNOOPPSSIISS
       Selected from _i_._o_r_t_h_o_._p_h_o_t_o

DDEESSCCRRIIPPTTIIOONN
       _p_h_o_t_o_._i_n_i_t creates or modifies entries in a camera initial
       exposure  station  file	for imagery group referenced by a
       sub-block.  These  entries  include:  the  (XC,YC,ZC)  UTM
       approximate  coordinates  of  the camera exposure station;
       initial roll, pitch, and yaw angles (in	degrees)  of  the
       cameras attitude; and the _a _p_r_i_o_r_i standard deviations for
       these parameters.  During the imagery  program,	hoto.rec-
       tify, the initial camera exposure station file is used for
       computation of the ortho-rectification parameters.  If  no
       initial	camera	exposure  station file exist, the default
       values are computed from the control points  file  created
       in _p_h_o_t_o_._2_t_a_r_g_e_t


       The following menu is displayed:

	       Please provide the following information

	    INITIAL XC: Meters		      __________
	    INITIAL YC: Meters		      __________
	    INITIAL ZC: Meters		      __________
	    INITIAL omega (roll) degrees:     __________
	    INITIAL phi  (pitch) degrees:     __________
	    INITIAL kappa  (yaw) degrees:     __________

	    Standard Deviation XC: Meters     __________
	    Standard Deviation YC: Meters     __________
	    Standard Deviation ZC: Meters     __________
	    Std. Dev. omega (roll) degrees:   __________
	    Std. Dev. phi  (pitch) degrees:   __________
	    Std. Dev. kappa  (yaw) degrees:   __________

	    AFTER COMPLETING ALL ANSWERS, HIT <ESC> TO CONTINUE
			 (OR <Ctrl-C> TO CANCEL)

       The  INITIAL  values  for  (XC,YC,ZC) are expressed in UTM
       coordinates, and represent an approximation for the  loca-
       tion of the camera at the time of exposure.


       The  INITIAL values for (omega,phi,kappa) are expressed in
       degrees, and represent an approximation	for  the  cameras
       attitude  at the time of exposure.


       The  standard  deviations  for (XC,YC,ZC) are expressed in
       meters, and are used as _a _p_r_i_o_r_i values for  the  standard
       deviations  used in computation of the ortho rectification
       parameters.


       The  standard   deviations   for   (omega,phi,kappa)   are
       expressed  in degrees, and are used as _a _p_r_i_o_r_i values for
       the standard deviations used in computation of  the  ortho
       rectification parameters.





SSEEEE AALLSSOO
       _i_._o_r_t_h_o_._p_h_o_t_o


       _p_h_o_t_o_._c_a_m_e_r_a



       _p_h_o_t_o_._2_i_m_a_g_e



       _p_h_o_t_o_._2_t_a_r_g_e_t



       _p_h_o_t_o_._r_e_c_t_i_f_y




AAUUTTHHOORR
       Mike Baba,  DBA Systems, Inc.

       _L_a_s_t _c_h_a_n_g_e_d_: _$_D_a_t_e_: _2_0_0_2_/_0_1_/_2_5 _0_5_:_4_5_:_3_4 _$



GRASS 5.0					    photo.init(1)
