Graph and plot digitizer (digitizing). The "xyExtract" software is used for to extract data from a 2D graph (orthogonal and nonorthogonal axes) contained in a graphic file (scanned, PDF document or in a some file like gif, jpg, etc). The graphic file must be saved in a bitmap file. Then, the "xyExtract" converts the graph back to xy data file. Keywords: Graph and plot digitizer, digitizing, ungraphing, scanned graphs, contour maps, charts, PDF, gif, jpg files, extract, capture.