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GPS Reference
Since this network is over constrained, it is possible to reserve a couple of point pairs as check
values in testing the parameters of the horizontal transformation. Pairs 103/1103 and 105/1105 have
been randomly selected as test pairs and have been deselected as constraints in the horizontal and
vertical component.
These two test pairs will not be used in the computation of the horizontal transformation parameters
but the transformation parameters will be applied to the measured points (1103 and 1105) to produce
the residuals as shown. In this case we see that the residuals are acceptable and thus it can be
assumed that the determined transformation parameters are reliable.
Adjustment Results
Upon satisfaction of the applied constraints and relevant residuals, the transformation parameters
can be viewed or modified. As indicated in Figure 9, the four horizontal transformation parameters
(translation in northing, translation in easting, scale and rotation) and the three vertical transformation
parameters (bias, slope in X, and slope in Y) are shown in the grid list.
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