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Note: This document is for an older version of GRASS GIS that will be discontinued soon. You should upgrade, and read the current manual page.

NAME

r3.mkdspf - Creates a display file from an existing 3D raster map according to specified threshold levels.

KEYWORDS

raster3d, display, voxel

SYNOPSIS

r3.mkdspf
r3.mkdspf --help
r3.mkdspf [-qf] input=string dspf=name [levels=float[,float,...]] [min=float] [max=float] [step=float] [tnum=integer] [--overwrite] [--help] [--verbose] [--quiet] [--ui]

Flags:

-q
Suppress progress report & min/max information
-f
Use flat shading rather than gradient
--overwrite
Allow output files to overwrite existing files
--help
Print usage summary
--verbose
Verbose module output
--quiet
Quiet module output
--ui
Force launching GUI dialog

Parameters:

input=string [required]
Name of an existing 3D raster map
dspf=name [required]
Name for output display file
levels=float[,float,...]
List of thresholds for isosurfaces
min=float
Minimum isosurface level
max=float
Maximum isosurface level
step=float
Positive increment between isosurface levels
tnum=integer
Number of isosurface threshold levels
Default: 7

Table of contents

DESCRIPTION

Creates a display file from an existing grid3 file according to specified threshold levels. The display file is a display list of polygons that represent isosurfaces of the data volume. If specific levels are given, additional optional parameters are ignored. Min or max may be used alone or together to specify a sub-range of the data. The step parameter is given precedence over tnum.

Flags:

-q
Suppress progress report & min/max information
-f
Use flat shading rather than gradient

Parameters:

grid3
Name of an existing 3D raster map
dspf
Name of output display file
levels
List of thresholds for isosurfaces
min
Minimum isosurface level
max
Maximum isosurface level
step
Positive increment between isosurface levels
tnum
Number of isosurface threshold levels
Default: 7

NOTES

Currently the grid3 file must be in the user's mapset since the display files being created are specific to particular grid3 files and are contained in directories under them. We should create a mechanism where users may make display files from others' grid3 files without having to copy them to their mapset.

EXAMPLES

With grid3 data (phdata) in the range 3-7, we only want to see isosurface values for the range 4-6. Any of these commands will produce the same results:
r3.mkdspf phdata dspf=iso min=4.0 max=6.0 tnum=5
r3.mkdspf phdata dspf=iso levels=4.0,4.5,5.0,5.5,6.0
r3.mkdspf phdata dspf=iso min=4.0 max=6.0 step=0.5

AUTHOR

Bill Brown, bbrown@gis.uiuc.edu

SOURCE CODE

Available at: r3.mkdspf source code (history)

Latest change: Thursday Feb 03 11:10:06 2022 in commit: 547ff44e6aecfb4c9cbf6a4717fc14e521bec0be

Note: This document is for an older version of GRASS GIS that will be discontinued soon. You should upgrade, and read the current manual page.

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