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r3.mkdspf

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r3.mkdspf: Creates a display file from an existing grid3 file according to specified threshold levels.

NAME

r3.mkdspf - Creates a display file from an existing grid3 file according to specified threshold levels.
KEYWORDS
raster3d, voxel
SYNOPSIS
r3.mkdspf r3.mkdspf help r3.mkdspf [-qf] input=string dspf=string [levels=float[,float,...]] [min=float] [max=float] [step=float] [tnum=integer] [--verbose] [--quiet] Flags: -q Suppress progress report & min/max information -f Use flat shading rather than gradient --verbose Verbose module output --quiet Quiet module output Parameters: input=string Name of an existing 3d raster map dspf=string Name of 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 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

EXAMPLE:

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

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 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.

AUTHOR

Bill Brown, bbrown@gis.uiuc.edu Last changed: $Date: 2010-09-24 14:00:12 +0200 (Fri, 24 Sep 2010) $ Full index (C) 2003-2010 GRASS Development Team R3.MKDSPF(1)
 
 
 

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