v.in.dxf3d(1)	       Grass User's Manual	    v.in.dxf3d(1)



NNAAMMEE
       _v_._i_n_._d_x_f_3_d   -  Converts  the  Z  values  of  DXF files to
       attribute GRASS vector file format.
       _(_G_R_A_S_S _V_e_c_t_o_r _P_r_o_g_r_a_m_)

SSYYNNOOPPSSIISS
       Bv.in.dxf3dR
       Bv.in.dxf3d helpR
       vv..iinn..ddxxff33dd ddxxff==_n_a_m_e [[lliinneess==_n_a_m_e_[_,_n_a_m_e_,_._._._]_]

DDEESSCCRRIIPPTTIIOONN
       The v.in.dxf3d data  conversion	program  generates  GRASS
       dig_att files from a DXF file with Z values.


       This  program,  in conjunction with v.in.dxf, is ideal for
       automaticaly importing, to GRASS vector file, layers  with
       Z  values  (isolines  and  level contours) from DXF format
       files.


       Firts should be run the v.in.dxf program  for  import  the
       DXF  polylines  to  binary GRASS vector file format (dig).
       Later, the DXF  Z  values  of  the  isolines  layers  with
       v.in.dxf3d  (dig_att)  must  be	imported, and finally run
       v.support to attach at this layers their elevations.   The
       v.in.dxf3d.sh script can be used to make all this automat-
       icaly, for a maximun of two isolines layers (normally con-
       tours and master contours) from one DXF file.


       The v.in.dxf program only recognizes, by now, the Z values
       from polylines entities in the DXF format.



CCOOMMMMAANNDD LLIINNEE OOPPTTIIOONNSS
       Parameters

       _d_x_f    Name of the DXF input design file from  where  will
	      be extracted the Z values.

       _l_i_n_e_s  Name(s)  of  layer(s)  in DXF input file containing
	      isoline data with Z values, and the name(s)  to  be
	      assigned	to  the GRASS vector data (dig_att) files
	      output.



BBUUGGSS
       The program only recognizes the Z values if  they  are  in
       the "30" field of the POLYLINE entity section.


       If the input DXF file is in MS-DOS text format, with CR/LF
       instead of Unix LF, the program doesn't run. To avoid this
       problem,  import  to Unix your DXF-MSDOS format files with
       FTP in ascii mode or with a command able to  convert  this
       files (DOS-COPY, mcopy, etc).



SSEEEE AALLSSOO
       v.in.dxf, v.support, v.digit, v.in.dxf3d.sh



AAUUTTHHOORR
       The  original  program  dxf3d2gras.bas  written in GWBASIC
       (MS-DOS) by Evaristo Quiroga, Hidrologic and Extern Geodi-
       namic  Unity  of  the  University  Autonoma  of	Barcelona
       (6/93).


       The program was rewritten in C for Grass-Unix  environment
       by Evaristo

       _L_a_s_t _c_h_a_n_g_e_d_: _$_D_a_t_e_: _2_0_0_2_/_0_1_/_2_5 _0_5_:_4_5_:_3_5 _$



GRASS 5.0					    v.in.dxf3d(1)
