Using ArcCatalog

Changing raster
dataset
previewing
properties
A raster dataset can be displayed
with either one band or
three bands simultaneously. If a
raster dataset has more than
three bands, only three can be
displayed at one time. When
you preview a single-band
raster dataset, the value of each
cell is drawn as a shade of gray
(by default), as random colors if
the file has less than 25 unique
values, or as a set of predetermined
colors if a colormap is
present.
When you preview a multiband
raster dataset, three of its
bands are combined to form a
composite image in which each
band supplies either the red,
green, or blue display value.
From the Raster tab in the
Options dialog box, you can
choose which band will provide
which value. You can specify a
different set of defaults,
mapping bands to red, green,
and blue (RGB) display values
for datasets with three bands,
and also with four or more
bands.
1. Click the Tools menu and
select Options.
2. Click the Raster tab.
3. Under 3 band data source,
type the number of the band
that will provide the red
display values.
Type the number of the band
that will provide the green
values.
Type the number of the band
that will provide the blue
values.
4. Repeat step 3 for raster
datasets with four or more
bands.
5. Click OK.
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220 USING ARCCATALOG