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 automaticaly, for a
       maximun of two isolines layers (normally contours and master  contours)
       from one DXF file.


       The  v.in.dxf program only recognizes, by now, the Z values  from poly-
       lines 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  vec-
	      tor 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 Geodinamic Unity of the Univer-
       sity 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)
