MEASURING METHOD AND DEVICE

PURPOSE:To allow independent work and provide efficient and labor saving survey operation by measuring positions on X, Y coordinates of three reference points set in a survey area or its vicinity and measuring angles formed by the respective reference points from a survey point. CONSTITUTION:An operator himself stands at a survey point P to set reference points A-C on a straight line or selectively in a survey area or its vicinity for finding positions on X, Y coordinates. Next, angles, acute angleAPC=alpha, acute angleBPC=beta, formed by the respective reference points A-C to each other are measured by using an angle measuring instrument such as a transit set up just above the survey point P. A circle Q which is constituted of three points, the points A, B out of the reference points A-C and the survey point P, in contact therewith and a circle S which is constituted of two points B, C and the survey point P in contact therewith have an intersection, the survey point P. Therefore, from the angle measurement value of circumferencial angles alpha, beta to the arcs AB, BC of the circles Q, S, the values on X, Y coordinates of the survey point P can be calculated in a given arithmetic method. This survey is done simply by measuring the angles alpha, beta from the survey point P to allow independent work and provide efficient and labor waving operation.