Tangent Between Curves
This feature allows you to calculate the end points of a tangent
line joining two curves. This may be used, for example, to
layout roads which do not have curve/tangent information.
Follow the prompts noted below and, if a solution is possible, the
endpoints of the tangent between the two curves will be calculated.
Point IDs will be assigned and coordinates stored for the points of
tangency. Repeat or enter “D” when done.
NOTE: There are 4 tangent
solutions for this problem. The solutions sets differ
according to the sign preceding the radius or degree of curve.
Prompts
Enter first radius point
[Done}: Enter or pick the center point for one of the
curves. Press Enter or type "D" and Enter when done.
Enter first radius
<0.00000>: Enter the radius of the first curve. Use a
"+" sign before the point ID to specify a clockwise curve or a "-"
sign to specify a counter clockwise curve.
Enter second radius point:
Enter or pick the center point for the second the curve.
Enter second radius
<0.00000>: Enter the radius for the second curve. Use
a "+" sign before the point ID to specify a clockwise curve or a
"-" sign to specify a counter clockwise curve.
Pulldown Menu Location:
CG-Survey > Cogo > Curves
Keyboard Command:
cg_tbc
Prerequiste:
coordinate file
