HD-MAX Echo Sounder User Guide
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WGS84 is adopted as source ellipsoid and Beijing 54 as local ellipsoid in
China.
Figure 7-4 Ellipsoidal parameter
Projector setting
The role of projection parameters is to achieve the transformation from space
rectangular coordinate system to plane rectangular coordinate system.
Choosing different projection methods will obtain different plane coordinates
correspondingly. The most frequently-used projective modes include
"Mercator", "Transverse Mercator", "Gauss -define" and so on.
Figure 7-5 Projective modes
Major parameters of projective modes setting include central meridian, north
with constants, east with constants, scale etc.. Generally, north with constants,
east with constants, scale are fixed constants. Users only need to set the
