| 摘要 |
In automatically obtaining a height h of a collimated position by collimating a leveling rod 1 to which bar marks 11 are attached, if the height h is obtained by an image pattern of the leveling rod 1, the size of the image pattern of the leveling rod 1 must be corrected inside an electronic level 2 depending on the distance between the leveling rod 1 and the electronic level 2. A long time is required for the computation processing for this correction. In this invention, on the other hand, the ratios of the distances between respectively adjoining bar marks 11 are obtained and the height h is obtained from the manner in which the ratios are arrayed.
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