Parent Topic: <A href="http://www.pcigeomatics.com/cgi-bin/pcihlp/RTV">RTV</a><hr>
<H3>PARAMETERS</H3>
RTV is controlled by the following global parameters:
<P>
<pre>Name     Prompt                                  Count     Type
FILE     Database File Name                      1-64      Char
DBIC     Database Input Channel List             1         Int
DBIW     Database Input Window                   0-4       Int
DBSN     Database Segment Name                   1-8       Char
DBSD     Database Segment Descriptor             0-64      Char
POLYINFO Polygon Info.: LINES/POINTS/BOTH        1-6       Char
BORDER   Border Vectors: ON/OFF                  1-4       Char
CONTINT  Contour interval                        0-1       Real

The following parameter receives output:

LASC     Last Segment Created                    1         Int
</pre>
<H4>FILE</H4>
Specifies the name of the PCIDSK file from which the image is read
and to which the vector data is written.
<P>
<PRE>
 EASI&gt;FILE=&quot;filespec&quot;
</PRE>
<H4>DBIC</H4>
Specifies the database image channel to vectorize.
<P>
<PRE>
 EASI&gt;DBIC=i
</PRE>
<H4>DBIW</H4>
Specifies the input image window to use in generating vector data.
<P>
<PRE>
 EASI&gt;DBIW=xoffset,yoffset,xsize,ysize
 EASI&gt;DBIW=                             | use entire image
</PRE>
<H4>DBSN</H4>
Specifies an 8-character quick identifier for the new vector
segment.
<P>
<PRE>
 EASI&gt;DBSN=&quot;name&quot;
</PRE>
<H4>DBSD</H4>
Optionally specifies a 64-character descriptor for the new vector
segment.
<P>
<PRE>
 EASI&gt;DBSD=&quot;descriptor&quot;
</PRE>
<H4>LASC</H4>
This parameter is assigned the segment number of the newly created
vector segment.
<P>
<H4>POLYINFO</H4>
<PRE>
  Valid Values:   LINES, POINTS, BOTH
  Default:        LINES
</PRE>
Specifies the type of information that should be generated from the
input image. Three options exist:
<P>
<PRE>
  LINES   =     Generate lines bounding each area
  POINTS  =     Generate an interior point for each area
  BOTH    =     Generate both lines and points
</PRE>
<H4>BORDER</H4>
<PRE>
  Valid Values:   ON, OFF
  Default:        ON
</PRE>
Specifies whether lines should be generated along the borders of the
image.
<P>
<UL>
<LI> This option is only used if: Polygon Info = LINES or BOTH 
</UL>
<PRE>
  ON     =   Generate border lines
  OFF    =   Do not generate border lines
</PRE>
<H4>CONTINT</H4>
<PRE>
  Valid Values:   x &gt; 0.0
  Default:        1.0
</PRE>
Optionally specifies a contour interval for generating contour
vectors from an elevation image. For example,
<P>
<UL>
<LI> If CONTINT is 100, then a contour vector is generated at
elevation 0, 100, 200, 300, and so on. 
<LI> If not specified, CONTINT defaults to 1, which means that a
contour is generated for every unique value in the image channel.
</UL>
NOTE: CONTINT cannot equal 0.
<P>
<H4>LayerName</H4>
<PRE>
  Valid Values:   &lt;string, 1-8 characters&gt;
  Default:        RTV
</PRE>
Specifies a name for the new vector layer.
<P>
<H4>LayerDesc</H4>
<PRE>
  Valid Values:   &lt;string, 0-64 characters&gt;
  Default:        &lt;none&gt;
</PRE>
<hr>
Parent Topic: <A href="http://www.pcigeomatics.com/cgi-bin/pcihlp/RTV">RTV</a><br>
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