Linear route measurement apparatus for determining absolute position, and linear guide performed by using the route measurement apparatus comprise a linear rail, a scanning device, a first analyzing device, a second analyzing device for analyzing a first signal and a second signal, and a calculating device, etc

Provided is a linear route measurement apparatus (10) for determining an absolute position, which comprises a linear rail (30), a scanning device (50), a first analyzing device (60) for analyzing a third signal (S3), a second analyzing device (65) for analyzing a first signal (S1) and a second signal (S2), a calculating device (70) for calculating a second absolute value (AW2) based on a first absolute value (AW1) and the position difference (PD) calculated by the second analyzing device (65), wherein the value represents an absolute position of the scanning device (50) at a second time point at the end of a first time interval. A linear route measurement apparatus (10) for determining an absolute position comprises a linear rail (30), a scanning device (50), a first analyzing device (60) for analyzing a third signal (S3), a second analyzing device (65) for analyzing a first signal (S1) and a second signal (S2), and a calculating device (70). A linear guiding system (1) comprises a movable object (20) and the