Engauge Digitizer - Graph Tutorial
Manually Digitizing A Graph Image
The following steps manually digitize a linear cartesian graph with
one curve:
- Import the testcase.png case from the Samples directory, using File/Import

- Click on the Axes Point button before entering axes points. These will
define the coordinate system

- Click on one of the axes to add the first axes point, then enter its
graph coordinates

- Click on one of the axes to add the second axes point, then enter its
graph coordinates

- Click on one of the axes to add the third axes point, then enter its
graph coordinates

- Click on the Curve Points button before entering curve points. These
will contain the digitized graph data

- 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 segment fill

- Export the curve points into a tabular text file using the
File/Export As menu option
