<P> It is commonly done with pacing beads, with every 100 m being counted with a bead . As noted above, terrain alters pacing and requires practice to master . </P> <P> Common uses of pacing consist of measuring tree height or measuring the distance between plots . Pacing saves time but is not as accurate as using a tape measure and can be affected by terrain such as steep slopes, rocky areas, streams, and thick brush . A common practice in pacing when an obstacle is encountered is to offset or pace around the obstacle . However, sometimes pacing around an obstacle is not always an option . Good pacing can only be accomplished by practice . Knowing the distance of one's pace will help to ensure accuracy and precision of pacing distances . </P> <P> Pacing can also be used with a map . In the field, pacing can be used to accomplish the correct distances referred by a map . Traversing a property line or boundary where distance and length are important produces opportunities for pacing to be applied to record accurate data . </P>

Give (2) examples of when pacing would be an acceptable measurement method