I have 2 geocoding results (in latitue and longitude) for a given address from different services. I'm interested in describing the results in relation to one another in terms of relative accuracy and am wondering whether there's a well-known algorithm for that comparison in the GIS world.
Let's say we have Result A, which we assume for the sake of this effort is 100% accurate. Then we have Result B and want to know inaccurate it is in comparison to Result A. Result A has 15 digits of precision while Result B has only 6, but even at the 6-digit precision the results are different.
Does taking the difference between the two results and dividing it by the "100% accurate" result and regarding that figure as the relative accuracy in percent even make any sense in GIS data? If not is there something else that does?
For whatever it's worth, this is at least partially an exercise in curiosity, since I'm fairly sure that at the resolution we need both results will be close enough.