MEASUREMENT DEVICE, MEASUREMENT METHOD, AND MEASUREMENT PROGRAM FOR WORK MACHINE

Provided is an apparatus for measuring the position and azimuth of a work machine (40), including a specified-point position calculation unit and an azimuth calculation unit. Based on the position of an index mark attached to a work mechanism (44) of the work machine (40) and posture information on the posture of the work mechanism (44), the specified-point position calculation unit calculates a specified-point position, which is the position of a specified point on the work mechanism (44), in a fixed control cycle. Only when a measurement permission condition is satisfied, the azimuth calculation unit calculates the azimuth of the machine body (42) of the work machine (40) based on a previous specified-point position, which is the specified-point position calculated last time by the specified-point position calculation unit, and a current time specified-point position, which is the specified-point position calculated this time. The measurement permission condition includes that current azimuth information corresponding to the current specified-point position is different from previous azimuth information corresponding to the previous specified-point position.