HD-MAX Echo Sounder User Guide
131
Since the height location accuracy of beacon difference or SBAS difference
is low, they can not satisfy the requirements of actual measurement. Thus it is
necessary to obtain water bottom elevation through tide level correction.
Click [Tide Correct] at main interface of the software to enter tide level
correction interface as shown in Figure 16-1.
Figure 16-1 Tide level correction
Mainly there are three methods for tide level correction:
(1) Single station correction: Input the geographical coordinates and water
level information of tide station at first and then select the survey line
documents for correction.
(2) Regional correction: Input the geographical coordinates and water level
information of multiple tide stations at first and then create correction area as
well as set tide station of the area. Eventually, select the survey line
documents for correction.
(3) Fixed water level: Set the fixed water level and choose the survey line
files needing to be corrected for correction.
Tide Station Data
(1) Input tide station data
Step I: Build a new tide station data Click [New], and a window will pop up
as shown in Figure 12-2. Input the station name and local coordinates of the
