Path Control - Direction Control

To access this dialog:

In the Decline Optimizerdialog, select thePath Controltab.

TheDirection Controlsectionis used to define the start and end azimuth values for a generate decline model, along with other parameters to control how path sections are oriented, and whether spirals are permitted.

Field Details

End of decline path is a straight line: if the End of decline path is a straight line option is checked then the path to the end point will be a straight line. If not checked the azimuth is to be modeled at the end location

Use Extended Path Types: if a partial turn to the left is designated L and a partial turn to the right R, and a straight segment is S, then the 4 basic path types between two locations are (LSL, LSR, RSL, RSR) and the remaining two path types are (RLR, LRL).

If this option is checked then all 6 path types may be used. If not checked only the four basic types are used, i.e. one turn cannot feed directly into another turn.

Minimum Straight Proportion: the Min straight proportion option provides a method to control the proportion of the path that is straight segments. If Straight/(Straight+Curved, not spiral) < proportion then the proportion of straight segment is increased for a feasible path.

Azimuth Control (Specify Initial and Final Azimuth): the desired Initial Azimuth and Final Azimuth can be specified in degrees.

If an Azimuth Field Name is selected to specify the azimuth and there is a valid value at the start or end points this takes precedence over the Initial Azimuth and Final Azimuth options. If no attribute name is selected the azimuths of the decline are unconstrained.

Allow Spirals: if this option is selected then the output is allowed to contain spirals.

Exhaustive Search: disabled by default, meaning a randomized search of entry and exit points is performed for each vertex of the decline string, selecting this option will force the Decline Optimizer to perform a regularized search to sample azimuths on a fixed increment within the full 360 degree range. In effect, this method will attempt to sample all possible azimuth combinations down the decline.

Selecting this option can increase calculation times.

	Related Topics
	Decline Optimizer Introduction