PROBLEM TO BE SOLVED: To do not only proofreading but also other work concerning a positional information measurement sensor, aiming at improvement in working efficiency for other uses using a member used for proofreading.SOLUTION: The positional information measurement sensors 101,102 are arranged in the state in which a part of a member of a main part of a work vehicle or a main part of a work vehicle equipped is contained in measuring ranges C and D, the proofreading treating part carries out proofreading processing using a part of the members with which the main part of the work vehicle or the main part of the work vehicle equipped in measuring ranges C, D of positional information measurement sensor 101,102 based on the measurement information of positional information measurement sensors 101,102, and the masking delimitation part sets the masking range using a part of the members with which the main part of the work vehicle or the main part of the work vehicle equipped in the measuring ranges C, D of the positional information measurement sensor 101,102 based on the measurement information of the positional information measurement sensors 101,102 after proofreading the installation condition of the positional information measurement sensor 101,102 in the request state.SELECTED DRAWING: Figure 11COPYRIGHT: (C)2020,JPO&INPIT【課題】校正のために用いた部材を他の用途にも利用して、作業効率の向上を図りながら、位置情報測定センサに関して、校正だけでなく、他の作業も行うこと。【解決手段】位置情報測定センサ１０１，１０２は、作業車両本体又は作業車両本体に備えられる部材の一部が測定範囲Ｃ，Ｄに含まれる状態で配置され、校正処理部は、位置情報測定センサ１０１，１０２の測定情報に基づいて、位置情報測定センサ１０１，１０２の測定範囲Ｃ，Ｄに含まれる作業車両本体又は作業車両本体に備えられる部材の一部を用いて、校正処理を行い、マスキング範囲設定部は、位置情報測定センサ１０１，１０２の設置状態を所望状態に校正した後の位置情報測定センサ１０１，１０２の測定情報に基づいて、位置情報測定センサ１０１，１０２の測定範囲Ｃ，Ｄに含まれる作業車両本体又は作業車両本体に備えられる部材の一部を用いて、マスキング範囲を設定している。【選択図】図１１
