grp - Grid points and lines

Name

[Reference Manual:#grp] — Grid points and lines

Syntax

grp [inc] | [nx ny] | [long] [sca] [ref] [csf] [aux] [ssf] [ssfdis] [rad] [trg] [pav] [mav] [exc] [log] [son] [2dc] [nsc] [mnp] [mrf] [cvf] [2d] [fast] [ext] [int]

Description

General gridding command from input points and lines into a grid surface. Default is parabolic interpolation.

Arguments

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

inc xinc yinc

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Create grid model grid with increments xinc and yinc .

nx ny

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Create a grid with nx times ny grid cells.

long num

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

sca

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

trg [gri]

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

ref reference_grid

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

csf closed_stick_faults

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Use closed_stick_faults in workspace as input to gridding.

aux help_lines

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Help lines to be used together with csf option.

ssf single_stick_faults

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Use single_stick_faults traces without values in workspace as input.

ssfdis split_distance

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Optional split_distance of single_stick_faults.

rad radius

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Use a radius value for max interpolation distance.

pav

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Interpolation is a blend of parabolic and moving average.

mav

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Moving average is used for interpolation.

smo smoothstrength

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Will use smoothing of cube at end of gridding.

exc value

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Exclude points at grid node closer than value to achieve a smoothing effect. grp exc is often run as an extra smooth step after the gridding.

log log_number

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

son

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

2dc

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Input is 2D contour lines with values.

2d

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

nsc number_of_sectors

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For sort grid aplication: number_of_sectors used in interpolation.

mnp max_number_of_points

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For sort grid application: max_number_of_points used in interpolation.

cvf closed_value_faults

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Use closed_value_faults traces with values in workspace as input.

fast

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

ext

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Extrapolate a grid inside the window. Input is a grid.

int

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Interpolate a hole in a grid. Input is a grid.

mrf

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See argument mrf in the son command.

Examples

Ex.1: Point gridding

        mak ran 11      ;# Make 11 random points
        grp 50 50       ;# Make a grid of 50 50 nodes

        # Point model gridding
        z                 ;# Erase screen
        win demo          ;# Get demo window (450000 460000 6450000 6460000 1000 4000)
        mak ran 22        ;# Make random points
        poi               ;# Display points
        grp 70 70         ;# Make grid
        map               ;# Misplay map
        cco map rev tit {Depth} ; # color code type map, reverse color and title

The above example produces this image.

Examples of parabolic gridding

grp - Grid points and lines

Name

Syntax

Description

Arguments

Examples

Ex.1: Point gridding

See also