Program sfnnint | Natural neighbor interpolation (2-D) 
[SYNOPSIS]
sfnnint < ord.rsf coord=coord.rsf > grid.rsf velocity=vel.rsf n1= n2= d1= d2= o1=0. o2=0. order=2 vel=y dist=n voro=n repeat=1
[PARAMETERS]
file    | coord | = |   | 	auxiliary input file name
float   | d1 | = |   | 	
float   | d2 | = |   | 	sampling 
bool    | dist | =n |  [y/n] | 	if output distance 
int     | n1 | = |   | 	
int     | n2 | = |   | 	dimensions 
float   | o1 | =0. |   | 	
float   | o2 | =0. |   | 	origin 
int     | order | =2 |  [1,2] | 	Accuracy order for distance calculation 
int     | repeat | =1 |   | 	
bool    | vel | =y |  [y/n] | 	if y, the input is velocity; n, slowness squared 
string  | velocity | = |   | 	auxiliary input file name
bool    | voro | =n |  [y/n] | 	if output Voronoi diagram 
[DIRECTORY]
user/fomels
