HD-MAX Echo Sounder User Guide
56
Config
Figure 7-15 Options
(1) Helmert formula. Simplified or complete version are optional. If the
rotation angle is great at ellipsoid transformation, it is suggested to take the
complete formula.
(2) "Hd-Power" is to be clicked if the solved parameters from Hd-Power
software is to be applied. Choose the simplified formula for seven-parameter.
Choose the first one for secondary eccentricity formula.
Conclusion of This Chapter
Coordinate parameter setting is an essential link for measurement setup
which determines local coordinate precision directly. Generally, there are two
types of coordinate transformation methods, seven-parameter, and
four-parameter plus elevation fitting. If transformation parameters of local
coordinate system are provided, the user only needs to input corresponding
parameter. If not, it is necessary to solve the transformation parameters.
When the number of known points is more than three, generally,
seven-parameter will be applied; when the number of known points is two,
four-parameter plus elevation fitting will be applied.
