3
Creates a display file from an existing grid3 file according to
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specified threshold levels. The display file is a display list
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of polygons that represent isosurfaces of the data volume. If
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specific <I>levels</I> are given, additional optional parameters
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are ignored. <I>Min</I> or <I>max</I> may be used alone or together
8
to specify a sub-range of the data. The <I>step</I>
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parameter is given precedence over <I>tnum</I>.
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<dd>Suppress progress report & min/max information
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<dd>Use flat shading rather than gradient
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<dd>Name of an existing 3D raster map
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<dd>Name of output display file
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<dd>List of thresholds for isosurfaces
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<dd>Minimum isosurface level
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<dd>Maximum isosurface level
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<dd>Positive increment between isosurface levels
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<dd>Number of isosurface threshold levels
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With grid3 data (<I>phdata</I>) in the range 3-7,
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we only want to see isosurface values for the range 4-6.
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Any of these commands will produce the same results:<br>
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r3.mkdspf phdata dspf=iso min=4.0 max=6.0 tnum=5
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r3.mkdspf phdata dspf=iso levels=4.0,4.5,5.0,5.5,6.0
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r3.mkdspf phdata dspf=iso min=4.0 max=6.0 step=0.5
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Currently the grid3 file must be in the user's mapset since the
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display files being created are specific to particular grid3
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files and are contained in directories under them.
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We should create a mechanism where users
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may make display files from others' grid3 files without having to
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copy them to their mapset.
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<SIGNATURE>Bill Brown,
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<a href="mailto:brown@gis.uiuc.edu">bbrown@gis.uiuc.edu</a>
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<p><i>Last changed: $Date: 2011-11-08 12:29:50 +0100 (Tue, 08 Nov 2011) $</i>