Leica TS11, Руководство пользователя

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TS11/TS15, Technical Data 203
Reduction to mean
sea level
Δ
D
2
The values for
Δ
D
2
are always negative and are derived from the following formula:
Projection distor-
tion
Δ
D
3
The magnitude of the projection distortion is in accordance with the projection
system used in a particular country, for which official tables are generally available.
The following formula is valid for cylindrical projections such as that of Gauss-Krüger:
In countries where the scale factor is not unity, this formula cannot be directly
applied.
Δ
D
2
Reduction to mean sea level [ppm]
H Height of EDM above sea level [m]
R 6.378 * 106 m
TS_106
Δ D
2
= -
H
R
· 10
6
Δ
D
3
Projection distortion [ppm]
X Easting, distance from projection zero line with
the scale factor 1 [km]
R 6.378 * 106 m
TS_107
Δ D
3
= X
2
2R
2
· 10
6