Automatic Point Renaming

Currently there are two different ways to rename the points within a point group using a comparison to a second point group. These options can also be accessed directly from the right-click menu of the group you wish to rename.

Renaming By Proximity

Renaming by auto-corresponding to points uses a group of points as a name reference. A different group of points is then renamed based on the reference group’s names. You can rename points by proximity to a set of reference points. This is extremely useful for quickly renaming points in preparation for a Point to Point Best-Fit operation for example. When renaming by proximity, SA will search for a point in a reference group that is closest to a point in the group to rename. As long as the reference point is within the specified threshold, the point to rename will be assigned the same name as the reference point. Note that the reference group and group to rename need not have the same number of points.

The renaming operation is controlled by a Proximity Distance Match Tolerance. This is the furthest that a reference point can be located relative to the point to rename to be considered a match. If more than 1 point is within the tolerance specified the points will be renamed and incremented numerically using the reference name as a base (for example TB1, TB1-1, TB1-2, etc).

Probably the most common use for this is when remeasuring a set of tie-in points after an instrument has drifted (moved) beyond the desired threshold. After remeasuring the tie-in points, since the instrument has only slightly changed position, they will be relatively close to the nominal tie-ins. In this case, you need not be concerned with the proper naming of the points. Simply measure them, and SA will take care of automatically renaming them for you.

Renaming By Inter-Point Distance

Renaming using interpoint distance offers an even more convenient alternative. It is a more advanced method of name matching because it does not require the points to be spatially close to each other. The command is governed by an Inter-point distance match tolerance. This tolerance is the maximum allowable difference between the spacing of any proposed pair of renamed points and the corresponding spacing of that same pair of points in the reference group. If the difference exceeds this value, the set is not considered a match.

Note that the reference group and group to rename need not have the same number of points. Any points that don’t match will be ignored.