1. ԼĹarc:w d:\w2001.
2. ĳһͼתΪgridͼ㣬ʹlinegridpointgrid:
   arc:linegrid  inputͼ gridͼ weight
   ʾ,:
   cell size:0.02
   convert the entire coverage(y/n)?:n
   grid origin(x,y):0 0
   grid size(nrows,ncolumns):400 400
3. gridͼתΪһasciiļ:
   arc:gridascii gridͼ ļ.txt
4. ɾȥļ.txtheader
5. frotran,һļ.txt,header(ע߶ε,
   ѡСֵʱ).
6. ʹasciigridһļ.txtתΪgridͼ.
7. ʹpolygridgridͼתΪһVoronoiͼ.
   
      
     
