ScanIt

ScanIt is a program for obtaining data from scanned graphs. Data can be present in the form of curves, of symbols, or you can simply gather data by clicking on point in the graph.

To get started, you first have to either scan or open an image of a graph. Next, you will need to identify thre known coordinates in the graph to define de X and Y axes. Now you can pick your data bay hand, or collect the data from curves or symbols.