v.bubble(1)	       Grass User's Manual	      v.bubble(1)



NNAAMMEE
       vv..bbuubbbbllee   -  Creates a vector file which consists of bub-
       ble(s)  for each point in a site-file and with a size rel-
       ative to the z value of that point.
       (GRASS Vector Program)

SSYYNNOOPPSSIISS
       vv..bbuubbbbllee
       vv..bbuubbbbllee hheellpp
       vv..bbuubbbbllee  [  --ss]  [[rraaddiiuuss==_v_a_l_u_e_] ssiitteeffiillee==_n_a_m_e oouuttppuutt==_n_a_m_e
       ffiieelldd==_v_a_l_u_e



DDEESSCCRRIIPPTTIIOONN
       "v.bubble"  will  create  "polygon"  circles  or   bubbles
       around  points  read  from  an existing "site_lists" file.
       The "site_lists" points will be the centers for those bub-
       bles  with  one	bubble created per point. The size of the
       bubble is relative to the z value (or "height" attribute")
       at  that  point. The maximum z value corresponds to a size
       of "radius".  The "polygon" bubbles will be written  to	a
       binary  vector  file.  Each "polygon" bubble will have 361
       points with each point on the circumference of the  bubble
       representing 1 degree of arc.



CCOOMMMMAANNDD LLIINNEE OOPPTTIIOONNSS
PPaarraammeetteerrss
       rraaddiiuuss Maximum  radius  corresponding  with  the maximum z
	      value in the "site-file".  One Unit of radius  cor-
	      responds with one unit of the map.
	      default: 1.0



       ssiitteeffiillee
	      GRASS site_lists file (input).

       oouuttppuutt Vector file to be created (output).



       ffiieelldd  Attribute field number to use for operation


       The  field  number  specifies the attribute field in sites
       list (point map) which shall be used. This  is  useful  in
       case of multiple attribute sites maps.

FFllaaggss
       _-_s     Automatically run "v.support" on newly created vec-
	      tor file.

NNOOTTEESS
       The programm is based on v.circle

SSEEEE AALLSSOO
       v.circle

AAUUTTHHOORR
       Job  Spijker   (spijker@geo.uu.nl)   ,	Utrecht   Univer-
       sity/Department of Geochemistry

       _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.bubble(1)
