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Method
☞
43.6.8
Description
Understanding priori-
ties of various
heights
43.6.9
Terms and expres-
sions
694
a
Road_090
Description
When staking out in the region of the start/end area of the design centreline,
situations occur where an expansion of the centreline is useful. As soon as
measurements are outside the defined centreline, the app prompts if and with
which method the centreline should be expanded.
The extension of a centreline is made following its start/end tangent. Outside
of the original design area correct results cannot be guaranteed.
Road/Rail - Working with Heights
Normally, heights stored with the design data are used. The Rail app offers the
possibility to switch to either:
a height which is entered manually.
•
This option enables the manual definition of a height, which can be applied
for staking out or checking. This height is entered in the
a height which is retrieved from an existing height layer, as defined in the
•
DTM job associated with the project. The layer from the DTM is applied and
used as a height reference for the staking out or checking of alignments.
2D and 3D are possible.
This option is configured in the toolbox.
Type of height
Manually entered
Of individual point
From height layer of DTM
From design
Rail - Working with a Single Track
Term / expression
Track
Single track
Track centreline
Chainage or station
b
a
Centreline
b
Extended centreline
Overrules
All other heights
All other heights
Design height
No other heights
Description
A track comprises two separate rails.
A single track is defined as one track with
one centreline and two rails. All chainages
are calculated from the centreline.
Geometric alignment in two or three dimen-
sions to which all design elements of the
project are referenced. It could be that the
vertical component of the alignment does
not coincide with the plan component. In
this case the vertical part of the alignment
will generally coincide with the lowest rail.
The cumulative distance along the centreline,
frequently but not always starting at zero.
/
/
/
page.
Stake Height Diff
Considered
Considered
Considered
Considered
Roads - General
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