Straight Lines Only
Use this function to convert an arc into a series of straight-line elements with the same geometry as that of the arc.
This tool sub-divides an arc/circle/polyline/clothoid into a series of straight lines.
There will be no change in the shape of the entity after sub-division.
The length of the sub-divided straight lines is determined by the radius, the clothoid parameter, and by the accuracy required.
The elevation of the converted straight lines will be the same as that of the original arc, circle, polyline, clothoid, etc.
Command prompts for:
Select a circle/arc/polyline:
Select the arc/circle/polyline, which is to be modified as a continuous polyline with only line elements. The program accepts only one entity.
Degree of accuracy <1.00>
Enter the accuracy number (a numeric value). The program converts the arc/circle/polyline to polyline, which will be having line elements only.
1.0 Very low accuracy.
2.0 Very high accuracy.
3.0 Half accuracy.
4.0 Double accuracy.
The degree of accuracy determines the accuracy to be used when sub-dividing arcs, transition curves, etc.
The function suggests a default value of 1.00.
If this value is increased, accuracy is increased and arcs are subdivided into more straight lines.
Smaller values give fewer lines. Large arcs require greater accuracy than small arcs.
The Degree of accuracy must therefore be evaluated from case to case.
Any value from 0.1 to 3.0 can be used.
A circle in plan with a radius of 10.0 m is converted to straight lines:
0.1 Very low accuracy.
3.0 Very high accuracy.
0.5 Half accuracy.
2.0 Double accuracy.
If a circle in plan with a radius of 10.0 m is converted to straight lines.
Accuracy 1.0 Maximum deviation between the radius and line segment: 3.1 mm, segment length 0.499 m.
Accuracy 2.0 Maximum deviation between the radius and line segment: 0.78 mm, segment length 0.249 m.
Accuracy 0.5 Maximum deviation between the radius and line segment: 12.4 mm, segment length 0.997 m.
See the below illustration where deviation and segment length are graphically represented. The parameter 0,0031 m is deviation and 0,4986m is segment length.