grp - Grid points and lines

No arguments, the grid will have the same number of rows and columns as the last grid that set the @nrow @ncol variables.

Create grid model grid with increments xinc and yinc .

Create a grid with nx times ny grid cells.

Create a grid with num nodes for the longest side. Use the same increment for the shortest side.

Result grid is polydata and the scalars will be gridded in an extra pass and put into the scalar part of the poly grid.

End up with polydata grid and a triangualtion model toward faults. Make a grid also when gri is given.

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

Use closed_stick_faults in workspace as input to gridding.

Help lines to be used together with csf option.

Use single_stick_faults traces without values in workspace as input.

Optional split_distance of single_stick_faults.

Use a radius value for max interpolation distance.

Interpolation is a blend of parabolic and moving average.

Moving average is used for interpolation.

Will use smoothing of cube at end of gridding.

Exclude points at grid nodes closer than (exclude radius) value (or specify number of nodes) to achieve a smoothing effect. If value or nod is omitted only the grid node to be smoothed is excluded and the 8 remaining grid nodes in the 3x3 grid node pattern (default) are used to evaluate the grid node using the parabolic interpolator unless the mav argument is used. grp exc is often run as an extra smoothing step after the gridding.

Smoothes like grp exc , but will not smooth at the border (no exclude points at border). Default is 1 node, but neb number_of_border_nodes will set the no_smoothing_zone higher. Thus with this argument one can extract a part of a grid and smooth it with grp exc neb and insert it into the grid (using rep lo grid) without having any unpleasant transition zone where the grid is inserted.

List info in message area. Gives a message for each log_number grid line.

Use sonar sorting of input. This is default for size of input points greater than 1000.

Input is 2D contour lines with values.

Input is 2D lines f.inst. from seismic.

For sort grid aplication: number_of_sectors used in interpolation.

For sort grid application: max_number_of_points used in interpolation.

Use closed_value_faults traces with values in workspace as input.

Fast gridding. Internal parameters are trimmed to give a fast result.

Extrapolate a grid inside the outline of the grid. Input is a grid. Will use the CMOS algorithm for a smoother extrapolation as default. 
par | mav - Will use the parabolic or moving average algorithm for faster performance.
ref referencegrid - Apply the reference grid referencegrid to tell where the extrapolation should be done. Any referencegrid that does not match input grid in size will lead to the following error message (as an example): 

 "2034558 2867380 Unequal number of points in the two grids

  while executing grp ext ref referencegrid"

Interpolate a grid inside holes in the grid. Input is a grid.
par - Will use the parabolic average algorithm.
poi points - Interpolate only holes where a point is present in workspace data points
cpo closedpolygons - Interpolate only holes where a closed polygon is present in workspace data closedpolygons. 
ext - will first perform interpolation to fill in interior holes; then extrapolation to extrapolate until grid frame.

See argument mrf in the son command.

Save default grid parameters from the active grid.

grp sav saves default parameters for gridding commands. After saving commands may be used without arguments; gridding commands will use the saved defaults to produce the same grid layout. Some commands may also need the window to be saved. It is therefore recommended to use grp sav in combination with ssc, which saves the window parameters.

Regrid active grid using default parameters saved by grp sav.