Parent Topic: <A href="http://www.pcigeomatics.com/cgi-bin/pcihlp/MODEL">MODEL</a><hr>
<H3>Image/Layer Data</H3>
The basic data that MODEL works with is the pixels in image channels
on the PCIDSK database. This data can be 8-bit integer, 16-bit
signed or unsigned integer or 32-bit real. Though channels on the
database are called `image channels', this is only a convention. In
fact, it is often more useful to think of a database as a series of
registered data layers. The following chart lists some of the types
of possible data layers that can be held in an image channel.
<P>
<PRE>
 Layer Type          Common Sources

 Raw Imagery         Satellite/Aircraft distributed on magnetic tape
 Elevation           USGS DEM from tape, gridded from contours
 Theme/Overlays      USGS LULC from tape, digitized from maps
 Proximity           Computed using PACE program PRX
 Processed Imagery   EASI/PACE programs, classified images, slopes
                     calculated from elevation,...
</PRE>
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Parent Topic: <A href="http://www.pcigeomatics.com/cgi-bin/pcihlp/MODEL">MODEL</a><br>
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