! ASCII_TEXT TEMPLATE OF SPATIO-TEMPORAL VARIABLE
! DISTRIBUTED IN A 3D SPATIAL GRID (X - Y - Z or LAYER)  
!
!  xmx,ymx: maximum x and y coordinate 
!  ymn,ymn: minimum x and y coordinate
!  nlayers: number of vertical layers along z axis
!  nrow: number of rows 
!  ncol: number of columns
!  brickvalues: variable values organized as a vector (x - y - z) 
!
!
