MEASURING DEVICE, MEASURING METHOD AND MEASURING PROGRAM

PROBLEM TO BE SOLVED: To enable measuring high in accuracy and high in work efficiency even in an environment where a GPS signal from a GPS satellite is hard to directly reach like a forest and the like.SOLUTION: A measuring device 10 includes: a distance calculation unit 30 that calculates a distance between a plurality of GPS satellites and a GPS reception unit 12 at each of the plurality of timing on the basis of respective GPS signals received at a plurality of timing in a measurement period; an approximate expression calculation unit 32 that calculates an approximate expression representing a relation between the distance calculated for each of the plurality of timing and the plurality of timing for each of the plurality of GPS satellites; an optimal distance specification unit 34 that specifies a distance in which an amount of movement of an approximate linear line is maximum as an optimal distance, of distances overlapping the approximate linear line calculated for each of the plurality of timing when the approximate linear line to be obtained by an approximate expression for each of the plurality of GPS satellites is moved parallel with a direction where the distance is short; and a position calculation unit 36 that calculates a position of the GPS reception unit 12 on the basis of the specified optimal distance.SELECTED DRAWING: Figure 1 【課題】森林域等のようにＧＰＳ衛星からのＧＰＳ信号が直接届きにくい環境でも、高精度かつ作業効率の高い測量を可能にする。【解決手段】測量装置１０は、測定期間内において複数のタイミングで受信したＧＰＳ信号の各々に基づいて、複数のＧＰＳ衛星とＧＰＳ受信部１２との距離を複数のタイミングの各々について算出する距離算出部３０、複数のタイミングの各々について算出した距離と複数のタイミングとの関係を表す近似式を複数のＧＰＳ衛星の各々について算出する近似式算出部３２、複数のＧＰＳ衛星の各々について、近似式により求まる近似直線を距離が小さくなる方向に平行移動させた場合に近似直線と重なる複数のタイミングの各々について算出した距離のうち、近似直線の移動量が最も大きい距離を最適距離として特定する最適距離特定部３４、特定した最適距離に基づいてＧＰＳ受信部１２の位置を算出する位置算出部３６を含む。【選択図】図１