ERROR CORRECTION APPARATUS

An error correction apparatus (34), arranged in an operation vehicle, is for correcting an error of a measured value obtained by a sensor device that is provided to a work vehicle and that is provided with a GNSS sensor and a gyro sensor, and is provided with: a first acquisition unit (341) that acquires the vehicle position of the work vehicle on a local coordinate system, the position having been measured by the GNSS sensor, and acquires an angular velocity on a sensor coordinate system that has three axes and that uses the sensor device as a reference, the angular velocity having been measured by the gyro sensor; a coordinate transformation unit (345) that performs, on the basis of the acquired angular velocity, coordinate transformation on the relative position vector at a measurement position at which the sensor device is disposed in the sensor coordinate system, the vector having the starting point at a set position set at a different position from the sensor device, into a relative position vector on t