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# Create a 3D grid (cube) using moving average as the default interpolator.
gr3 [inc] | [nx ny nz] [lat] [fill] [snap] [sca] [ref] [smo]

# Update cube towards wells in workspace
gr3 upd checkshot_name [check] [disk]
gr3 upd checkshot_name [tensor [max radius] | [fac factor]]
gr3 upd checkshot_name [conic [rad radius]]
gr3 upd checkshot_name ... [two | cube]

# Smooth cube with gaussian filter.
gr3 smo [gau [dim 2]] [z] gau [rad radius xradius yradius zradius]

# Write out inlines and crosslines in a cube to file filename.
gr3 write [lim] [xytv] [form format] inlinestart xlinestart inlinestop xlinestop inlinestep xlinestep filename

# Transform a cube or grid or polydata (points) to a new cube.
gr3 [ins workspacename] | [fgr] | [vsum] | [edi] | [cdi] | [int] | [form]

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Use a reference_grid in workspace to tell the layout of the result cube.

smo smoothstrength

Will use smoothing of cube at end of gridding.

Update cube towards wells in workspace.

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Update cube towards wells in workspace checkshot_name. Moving average is the default interpolator. 
check checkstart checkstop. Remove cells that has an unacceptable range within checkstart checkstop velocity. 
disk - Apply disk for temporary datasets. Used to save memory and recommended for large cube gridding. 
tensor - Update using b-spline tensor. [max radius]. Optionally use a max radius. [fac factor]. Optionally use a radius factor. 
conic - Update using conic shape. [rad radius]. Optionally use a radius value. 
two - The format of the well string is x y z two_way_travel_time.
    Default if not specified is x y z one_way_travel_time
cube - The format of the well string is the same as the cube: x y time cube_velocity.

Smooth cube with gaussian filter.

smo [gau dim 2] [rad radius xradius yradius zradius]

Smooth cube with gaussian filter. 
gau dim 2
rad xradius yradius zradius - Apply smmothing in only 2 dimensions 
z - Apply z-plane smoothing.Alternative to gaussian 
rad radius - Apply a radius value in smoothing.radius factors in smoothing. The factors are given independently to x, y, and z directions. Smoothing is a weighted sum of grid nodes to the side of the centre, where the number of nodes used is 2 times the radius factor.

gau rad 0 zradius - Apply smoothing only in the z-direction

Write out the z values of the cube as inlines and crosslines to an external file.

write [lim limlimit_value*] _inlinestart xlinestart inlinestop xlinestop ] [xytv] [form format] inlinestart xlinestart inlinestep xlinestep filename.

Write out cube to file filename
lim limit_value - Apply a limit and a limit_value for the number of nodes written out to test the procedure. 
inlinestart xlinestart inlinestop xlinestop
xytv - The output switches inline and xline when writing x y time velocity.
formformat - Format specification of the output:

format = 1 (default) : Id     inline  xline   x-utm       y-utm       time      velocity
format = 2: inline  xline   x-utm       y-utm       time      velocity
format = 3: xline   x-utm       y-utm       time      velocity
format = 0: x-utm       y-utm       time      velocity

iinlinestart xlinestart inlinestep xlinestep - Specify start and stop step of inlines and crosslines to be written out. 
filename - Specify file name of output.

Transform a grid or cube to a new cube.

gr3 [ins workspacename [all] ] | [fgr] | [vsum] | [edi] | [cdi] | [int] | [form]

A cube is in active data and is recalculated to a new cube. 
ins workspacename [all] - Insert values from the scalar data part in workspacename (grid, cube or polydata) into a cube in active. The all argument will insert into all neighboring cells as well.
fgr - Fill the cube in active with interpolated values for all undefined values. 
vsum - Sum the cube in active vertically. 
edi - Evaluate distance in 2d grid in active into a new 3d cube. 
cdi - Use computed distance in 3d grid for undefined. 
int - Interpolate between layers in the cube. See command object Cube generation of all layers
form [const a b c] [min max]. Using a formula for velocity cube gridding. Makes a time velocity cube based on a regression formula. Input is the seabed grid and the constant a, b and c that is present in the formula. The twt grid in the formula is the layers in the cube. min maxis the min and max values for the new cube.

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filt impl, gen - Generate grid

lim limit_value - Apply a limit and a limit_value for the number of nodes written out to test the procedure.