Leica Geosystems GPS System 500 - Technical Reference Manual - Manual (Page 279)

279 11. Applications Technical Reference Manual-4.0.0en
New WGS84 points may be mea-
sured from here using NEWOC (F5).
Press CONT (F1) to return to this
panel.
To edit an existing coordinate pair,
select the pair and press EDIT (F3).
Make any necessary adjustments and
press CONT (F1) to return to this
panel.
Use DEL (F4) to unmatch the se-
lected coordinate pair.
When a Classical type transformation
is being selected, the PARAM (F5)
key is available after pressing SHIFT.
This enables you to define the type of
transformation model and the
parameters for the transformation.
Trans-model - Select the type of
transformation model you wish to
use. In practice, you will only see
minimal differences in the
transformed coordinates between
each model. In principle Molodensky
- Badekas is more numerically stable
due to the fact that it takes its rotation
origin from the center of gravity of the
WGS84 coordinates. Bursa - Wolf
takes its centre of gravity from the
origin of the WGS84 datum.
You may then (if required) either enter
known values for certain parameters
and hold them fixed at those values
or set the values to 0. Parameters
that have the ----- displayed will be
calculated.
To hold a parameter fixed, highlight it.
The FIX (F4) key will become
available. Type in the fixed value. In
order that the parameter is simply not
calculated, enter 0.
To reset a fixed parameter, in order
that it will be calculated, select the
parameter and press ADJST (F4).
Press CONT (F1) to return to the
previous screen.
Press CONT (F1) to execute the
transformation calculation.