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Widenings and super elevations – Spectra Precision Survey Pro v4.6 Recon and Nomad User Manual User Manual

Page 96

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User’s Manual – Conventional Mode

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• Template segments must have a name. The template editor

provides fields to enter the segment name.

2. Any two templates without intervening Widening or Super

Elevations will transition.

• This means that each template segment will transition at a

linear rate from its existing offset from the centerline to the

new offset from the centerline as defined by the new template.

3. A template’s first segment slope and/or width will be modified

when:

• A template is located within a Super Elevation or Widening

definition including starting and ending stations and inside

Widening or Super Elevation transition areas.

• Templates will acquire first segment slope value from the

Super Elevation definition, and/or acquire its first segment

width value from the Widening definition.

4. Only one template may occupy any station.

• As little as 0.001 units can be used to separate templates.

Widenings and Super Elevations

1. Super Elevation and Widening stations must be within the

station range of the alignment.

2. Super Elevations and Widenings follow the same rules except

that the start and end stations of a Super Elevation are defined

by:

• Super Elevations will start their transitions at a point equal

to the user defined starting station minus ½ of the starting

parabolic transition length if parabolic transitions are used.

• Super Elevations will start their transitions at a point equal

the user defined ending station plus ½ of the ending parabolic
transition length if parabolic transitions are used.

3. Super Elevation start slope value and Widening start width value

must match the first segment value defined by:

• A previous Super Elevation or Widening. (Priority)