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Common Selection Requirements
In the Absolute, Delta, Plane and Surface Modes, the following setup options are common to each mode.
Portion
In Absolute, Delta, Plane and Surface modes you can select the line portion that you wish to elevate. This can be any of the following options
- All - For single or multiple line selections, you can adjust the entire line or all lines selected
- Start to Location - for single line selections, you can adjust the line from its start point to a defined location along the line.
- Location 1 to Location 2 - for single line selections, you can adjust the line between two defined locations along the line.
- Location to End - for single line selections, you can adjust the line from a defined location along the line to the end of the line.
When you select anything other than All, you will be asked to select the Location or Location 1 and 2 to define the range of the adjustment.
Primary Adjustment
In these modes you can make a primary adjustment and an optional secondary adjustment. The options for primary adjustment include the following
- Constant
- Range
- Undefined (Only in absolute mode)
Constant Adjustment
In this mode you can set a single elevation that will be applied to the entire station range of the line selected. for example set the value to 100 if you want the line to be raised / lowered to that elevation over the range selected.
Range Adjustment
In this mode you can specify an absolute elevation to be applied at the start of the range and a second elevation value to be applied at the end of the range. The line will transition between those two elevations over the distance between those two points.
Undefined
In this mode you can eliminate all elevations that are defined on the line between the start and end point of the range selected. The elevation is computed at the start of the range and at the end of the range and locked in with new elevation controls, and all elevations between are removed. This mode only applies to the Absolute mode.
Secondary Adjustment
If you wish to further vary the elevations over the range, you can apply a secondary adjustment that is compounded with the primary adjustment to adjust the line elevations. For example you may wish to set the line elevation to 100 between the range points but then subgrade adjust that by a further 1’ to create the base of subgrade. The secondary adjustment can be
- Constant
- Range
- None
An example of a secondary adjustment that is constant is a simple subgrade adjustment of 1’
An example of a secondary adjustment that is a Range Adjustment would be e.g. that at the start of the range the subgrade is 1’ thick but at the end of the range it is 1.5’ thick.
When you select the secondary adjustment mode, you will be asked to enter the value or values required when the mode is anything other than None.