Abstract: In connection with a touch indicating array device, exemplary aspects concern, a method involving the device having a touch surface and an array of sensors used to indicate a rough or coarse position, when touched, via a numeric value vector. This vector's weighted values may indicate the effective touch at each of the sensor position of the touch device. The weighted values may be processed by a module which operates on the weighted values using a discrete transform for obtaining one or more harmonic's phase of the spectral representation of the sensor array values. The resultant phase value of the first harmonic, representing a spatial phase, may then be used to refine the position within the sensor array that is more accurate than the rough or course position.