When LOGDRAFT plots a set of borings, by default the program places them by projecting onto an imaginary line connecting the two borings in the set that are farthest apart. All other borings are then plotted along this line in order of increasing distance from the left-most (as seen in the plan-view) of the two borings that are farthest apart. The overall effect is one of a cutaway view, where the cut was made on a line between the two borings farthest apart.
If a specific orientation is desired, use the plan view selection box to choose the borings to be included on the profile. The orientation of the arrow within the selection box determines the ordering of the borings along the profile.
LOGDRAFT has a second method of placing borings on a profile called the roving viewpoint method: This method places borings along the profile proportional to the distance between the boring and its nearest neighbor to the left. For instance, if boring B-1 is 2 times as far from its right-hand neighbor B-2 as B-2 is from its right-hand neighbor B-3, then B-1 will be placed twice as far from B-2 on the profile as B-2 will be from B-3. This has the effect of continually shifting the viewpoint of the observer to always be perpendicular to a line drawn between each pair of adjacent borings. (When all of the borings selected for inclusion on the profile lie along a straight line, the cutaway and roving viewpoint options will produce identical profiles.)
- You can select between the Cutaway and Roving Viewpoint methods through the Profiles tab of the Setup dialog.