r3.mkdspf(1grass) GRASS GIS User's Manual r3.mkdspf(1grass)
NAME
r3.mkdspf - Creates a display file from an existing 3D raster map ac-
cording 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] [--over-
write] [--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
DESCRIPTION
Creates a display file from an existing grid3 file according to speci-
fied 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
Example:
With grid3 data (phdata) in the range 3-7, we only want to see isosur-
face 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
NOTE
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 con-
tained 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.
AUTHOR
Bill Brown, bbrown@gis.uiuc.edu
SOURCE CODE
Available at: r3.mkdspf source code (history)
Accessed: unknown
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