An open traverse originates from a point whose position may be known or unknown but terminates to a point whose position is not known. In this type of traverse, computational check is not possible to detect error or blunder in distances or directions. To minimize error, repeated observations for measurements need to be taken. In Figure 28.1 consider a traverse ABCDE that originates from the point A which may be unknown or may be defined with reference to known point P lying on the line PQ of known azimuth, but it terminates to an unknown point E. Thus, traverse ABCDE is an open traverse. An open traverse is generally used for exploratory purpose such as mine surveying. It should generally not be used in civil engineering works unless situation dictates. So no further discussion on this will be done.

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