HD-MAX Echo Sounder User Guide
51
Attention:
Users shall pay attention to coherent units of
seven-parameter. Especially when the "K" value dimensional unit is
ppm (percent per million), users shall pay more attention at
inputting!
Plane transformation
Plane
transformation
parameters
refer
to
transformation
from
plane-coordinate system to local ellipsoid plane coordinate system after
completing source ellipsoid projection. The frequently-used conversion
methods include: 2D Helmert, TGO, Grid etc.
Figure 7-9 Plane transformation model
Set up parameters based on the selected model, or acquire the parameters
through Utilities, such as 2D Helmert:
