Spectra-precision Survey Pro v4.5 Ranger User Manual Manuel d'utilisateur télécharger pdf (Page 83)

Road Layout

The Road Menu contains a powerful set of routines that allow you to

enter and modify road layout information and then stake the road in

the field. The road staking routines allow you to stake any part of the

road or slope stake the road.

There are four basic components of a road: The Horizontal Alignment;

the Vertical Alignment; Templates, and a POB. All of these

components are described separately below and each is a required

component to a complete road definition.

Horizontal Alignment (HAL)

The horizontal alignment, referred to as the HAL, defines the

horizontal features of an alignment. It can contain information on

straight, curved, and spiral sections of the alignment. Generally the

HAL coincides with the centerline of a road, but it is not required to

be the centerline. All stationing for an alignment will come from the

HAL.

Vertical Alignment (VAL)

The vertical alignment, referred to as the VAL, defines the vertical

components of the alignment including grades and parabolic vertical

curves.

The VAL is generated in the same way as the HAL. The VAL can be

the same length as the HAL, or longer, but it cannot be shorter.

Templates

Templates contain the cross section information for the road.

Templates are stored in separate files with a TP5 extension so they

can be used with multiple jobs. The templates are broken down into

sections, called segments. Each segment contains a specified length,

and slope or change in elevation. Templates can contain as many

segments as needed, but must have at least one segment. Each

segment describes one component of the cross section such as the

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Spectra-precision Survey Pro v4.5 Ranger User Manual Manuel d'utilisateur Page 83