This command calculates point coordinates given the angle and distance measurements to two or three reference points. This command only applies to total stations. The reference points are specified by point number. These reference points need to be stored in the current CRD file before running this command. This function can be used when setting up the Total Station on an unknown point.
The command starts with a dialog to choose between
using two or three reference points. Then for each
reference point, there is a dialog to enter the reference point
number, instrument height and target height. After
entering this data and sighting the target, pick the Read Gun
button to take a measurement. The measurement angles
and distance are reported for a check in a dialog. When all
the measurements are done, the results are show in a dialog.
The results include the calculated coordinates and the residuals.
The program calculates the coordinate by averaging the
distance-distance and angle-angle solutions. Since there is
redundant data, the final calculated coordinate will differ slightly
from the individual measurements. For example in a 3-point
resection, there are two different distance-distance solutions
(between the first-second point and between the
second-third points). The program reports the difference between the
final coordinate and the individual solutions as the
residuals which act as an indicator whether the data is good.
High residuals suggest a problem with the input data. In the
dialog that displays the final coordinates and residuals, there is
a button to store the coordinates to the current CRD file
with a specified point number.