Measure distance between original and edited points

Discussion created by aurelia128 on Sep 30, 2011
Latest reply on Oct 4, 2011 by dlee-esristaff
I have a shapefile of fish occurrence records that I am editing so that the occurrences match up with a river shapefile (so that my fish data are in water for when I use the layer in a modeling program later).  I want to know how far I am moving each point, though, so I have been measuring with the ruler tool each time I move a point.  I'm wondering, though, if there is a way to compare the original point shapefile to the edited shapefile (saved under a different name) and have ArcMap measure these distances for me.  It would both save me a lot of time and be more accurate than the eyeballing method I'm using.  The attribute table is the same for both files, just the coordinates are changed in the edited file, so the FID for a point in the original file matches the FID for a point in the edited file.

Any help on this is greatly appreciated.  Note - I am a student and have basic knowledge of ArcMap, but am not very advanced.