interactively extracts numbers from bitmap graphs or maps

 This digitizing software converts an image file showing a graph or map into
 xy data (coordinates). Some people use it for obtaining the original data
 from graphs in scientific publications.
 .
 Features:
    * Automatic grid line removal
    * Automatic point matching
    * Automatic curve tracing
    * Automatic axes matching
    * Handles cartesian, polar, linear and logarithmic graphs
    * Support for drag-and-drop and copy-and-paste
    * Context sensitive help, user manual and tutorials explain every feature
    * Preview windows give immediate feedback while modifying settings