Spectra Precision FAST Survey Reference Manual - Manual (Page 280)

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point number or file each alignment “pair” (H and V) that define an edge-of-pavement or other feature of the
sections. It takes a 3D polyline, or a pair of horizontal and vertical files, or any mixture of points, polylines
and files, to define a single offset feature.
Click on Left Surface, for example, then Click Add. This brings up the same screen used to define the
centerline. If you have a drawing of 3D polylines (brought in as a DXF file, for example), it is very easy to
illustrate this command by the Pick Polyline option. When chosen, you obtain the next screen, where you can
pick the EP.
Now click OK, say Yes to Overwrite vertical alignment (if the polyline is 3D), and simply OK the screen (no
need to save the file as a named alignment). This brings up the name template ID dialog.
Repeat for the outer polyline (SH, left side), then for the EP on the right side and SH on the right side. You
now have a centerline and 4 offset alignments from which to cut sections. When you get the full contingent of
alignments defined, click Save As to save the TPA file . Now any design offset at any station will be
automatically interpolated, and normal template/section stakeout can proceed.
 Save Roading Files:
This button will save the selected set of roading files as an RDF file for recalling later.
 Load Roading Files:
This button loads all of the files previously saved to an RDF file. The files must still be
present in the original locations.
Interpolation
If descriptions are provided, “intelligent” interpolation is performed between similar descriptions on slope transitions or
widening lanes as well as vertical curves for all methods described above.
Stake Road