Patent ID: 8614826

Claim:
A method comprising: while moving a device over a medium, performing a first measurement of a path of the device over the medium, obtaining a measurement of the device relative to a reference, and based on the measurement of the device relative to the reference, performing a second measurement of the path of the device over the medium, performing a comparison of (i) the first measurement of the path of the device over the medium to (ii) the second measurement of the path of the device over the medium; based upon the comparison, generating a scaling factor, wherein the scaling factor is based at least in part on a difference between (i) the first measurement of the path of the device over the medium and (ii) the second measurement of the path of the device over the medium; and creating a lookup table including the scaling factor, wherein the scaling factor in the lookup table is usable by the device to adjust a subsequent measurement of the device relative to the reference.