COGO TPS1200+/TS30/TM30 41
2.9 COGO Calculation - Shift, Rotate & Scale (Match Pts) Method
Description The COGO calculation shift, rotate & scale (match pts) applies shifts and/or rotation
and/or scale to one or several known points. The shifts and/or rotation and/or scale
are calculated from selected points using a 2D Helmert tranformation.
The number of pairs of points matched determines whether the shift, rotation and
scale values are computed.
Access Refer to "2.2 Accessing COGO" to access COGO Match Common Points (n).
COGO
Match Common
Points (n)
This screen provides a list of points chosen from the active job. The points are used
for the determination of the 2D Helmert transformation. Unless there is no pair of
matching points in the list all softkeys are available.
Description of columns
CALC (F1)
To confirm the selections, compute
the transformation and continue with
the subsequent screen.
NEW (F2)
To match a new pair of points. This
pair is added to the list. A new point
can be manually occupied. Refer to
paragraph "Match points step-by-
step".
EDIT (F3)
To edit the highlighted pair of
matched points.
DEL (F4)
To delete the highlighted pair of
matched points from the list.
MATCH (F5)
To change the type of match for a
highlighted pair of matched points.
RESID (F6)
To display a list of the matched
points used in the transformation
calculation and their associated
residuals.
SHIFT PARAM (F5)
To define the parameters to be used
in the 2D transformation. Refer to
paragraph "Fix parameters".
Column Description
Source Pt The point ID of the points of origin for the calculation of the shifts
and/or rotation and/or scale.
Target Pt The point ID of the target points for the calculation of the shifts
and/or rotation and/or scale.
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