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  Engauge Digitizer - Manual Line Graph Tutorial</H2>
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<H3>Manually Digitizing A Line Graph Image</H3>
<P>The following steps manually digitize a linear cartesian graph with 
one curve. These steps are essentially the same as the
steps involved in <A HREF="tutormanpointgraph.html">manually 
digitizing a point graph</A>.</P>
<UL>
<LI>Import the testcase.png case from the Samples directory, using 
File/Import as shown. Not shown are the other methods of importing:
using the <A HREF="commandlineoptions.html">"-import" command line option</A>, 
by copying and pasting, and by dragging and dropping</LI>
</UL>
<P ALIGN="center"><IMG SRC="tutormanlinegraph1.png" ALT=""></P>
<UL>
<LI>Click on the Axes Point button before entering axes points. These will 
define the coordinate system</LI>
</UL>
<P ALIGN="center"><IMG SRC="tutormanlinegraph2.png" ALT=""></P>
<UL>
<LI>Click on one of the axes to add the first axes point, then enter its 
graph coordinates</LI>
</UL>
<P ALIGN="center"><IMG SRC="tutormanlinegraph3.png" ALT=""></P>
<UL>
<LI>Click on one of the axes to add the second axes point, then enter its 
graph coordinates</LI>
</UL>
<P ALIGN="center"><IMG SRC="tutormanlinegraph4.png" ALT=""></P>
<UL>
<LI>Click on one of the axes to add the third axes point, then enter its 
graph coordinates</LI>
</UL>
<P ALIGN="center"><IMG SRC="tutormanlinegraph5.png" ALT=""></P>
<UL>
<LI>Click on the Curve Points button before entering curve points. These 
will contain the digitized graph data</LI>
</UL>
<P ALIGN="center"><IMG SRC="tutormanlinegraph6.png" ALT=""></P>
<UL>
<LI>Click on the curve to add a curve point. Repeat until the graph is 
covered with a sufficient number of curve points. If this step is too
slow and tedious, you can first automatically digitize entire segments
at a time using <A HREF="tutorautolinegraph.html">segment fill</A></LI>
</UL>
<P ALIGN="center"><IMG SRC="tutormanlinegraph7.png" ALT=""></P>
<UL>
<LI>Export the curve points into a tabular text file using the 
File/Export As menu option as shown. Not shown are the other methods of
exporting the curve points from the
<A HREF="dlgcurvegeometry.html">curve geometry window</A>: copying and pasting,
and dragging and dropping</LI>
</UL>
<P ALIGN="center"><IMG SRC="tutormanlinegraph8.png" ALT=""></P>
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