Spectra-precision FAST Survey Reference Manual Manual de usuario descargar pdf (Pagina 258)

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Section Files

: Section files can be used to identify the pivot points left and right and minimize fieldwork. Consider

the sections shown below.

Shown are stations 0+20 and 0+40, with the pivot points for slope staking identified on station 0+40. For the

section approach to work, the left-most point in the cross section must be the left pivot, and similarly, the

right-most point in the cross section must be the right pivot point. The section should only be entered from

pivot left to pivot right (the “designed” catch points should be dropped). But since the interior section points

have no bearing on the slope staking, they can be omitted, too. So in the case of station 0+40, a 2-point cross

section could be entered, consisting of pivot left and pivot right. That 2-point section is also shown in the

graphic above. It is just as effective for slope staking as a section containing all the break points between

pivots. The one exception is if you have entered descriptions for your section points, you can obtain a

progressive slope stake report, just as with the templates. Note that if descriptions do not exist, the report

leaves them out. Section-based slope staking requires selection of a centerline file and field-entry of the cut

and fill slopes.

Section-based slope staking is useful when the pivot points for stakeout vary unpredictably and don’t conform

to a fixed template. Section-based slope staking has 2 advantages. First, all sections can be entered in the

office as 2-point sections (left and right pivot), minimizing field paperwork and reference material. Secondly,

odd stations can be staked out (eg. station 0+27.5), since the pivot points can be straight-line interpolated by

the program.

Note:

Section files can be used for slope staking within the command

Stake Road

. In this routine, you can

choose sections or templates to stake, and you can pick any point to slope stake from—so any point on the

section can become the pivot point. The advantage of slope staking by section file within

Stake Road

is that

you can pick any point (greater flexibility). The advantage of slope staking by section file within the

Stake

Slope

routine is that it automatically uses the left and right end points of the section as pivot points, which

means less screen picks are involved (greater speed).

Section files may be entered in Road Utilities, or in an external program such as Carlson Civil, Roads or

TakeOff.

Choosing the Slope Staking Method

When Slope Staking is selected, you are presented with a Definition Method screen, where you choose among the 4

methods of Slope Staking: User-Defined, Point-Defined Alignments, Design Files or Section Files. The application of

these methods is discussed above.

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Spectra-precision FAST Survey Reference Manual Manual de usuario Pagina 258