Offset Points Of Auto Points; Overview - Leica TM30 Series Field Manual

14.4

Offset Points of Auto Points

14.4.1

Overview

Description
Computation of
offset points
Survey - Auto Points
• Offset points
• can be created with auto points when auto points are stored to the DB-X.
• can be to the left or to the right of auto points.
• are automatically computed with the logging of auto points, if configured.
• form a chain relative to the chain of auto points to which they are related.
Subsequently computed chains are independent from each other.
• can be coded independently of auto points.
• have the same time of when they were stored as the auto points to which they
are related.
• Up to two offset points can be related to one auto point. The screens for the
configuration of offset points are identical except for the title Auto Points -
Offset 1 and Auto Points - Offset 2. For simplicity, the title Auto Points -
Offset is used in the following description.
The computation of offset points depends on the number of auto points in one chain.
One auto point
No offset points are computed or stored.
Two auto points
The configured offsets are applied perpendicular to the line between two auto points.
Three or more auto points
The first offset points are computed perpendicular to the line between the first and
the second auto point.
The last offset point is computed perpendicular to the line between the last auto point
and the one before.
All other offset points are computed on a bearing. The bearing is half of the angle
between the last and the next measured auto point.
P6
1
P3
d1
P1
P4
d2
TPS12_168
TPS1200+/TS30/TM30
P8
P9
2
P5
P10
P2
P7
P1 First auto point
P2 Second auto point
P3 First offset point for P1
P4 Second offset point for P1
P5 Third auto point
P6 First offset point for P2
P7 Second offset point for P2
P8 Fourth auto point
P9 First offset point for P5
P10 Second offset point for P5
d1 Horizontal offset to the left
d2 Horizontal offset to the right
α1 Angle between P1 and P5
α2 Angle between P2 and P8
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