Weird Curve Wont Offset

LarryGaudieri

I'm trying to create a parallel utility easement along right-of-ways and really hope not to have to segment ever curve from plat. The attached *.jpeg shows a half-circle curve in a type of cul-de-sac or turn-about. I cannot for the life of me offset that arc without ArcMap crashing...does anyone have any tricks or suggestions? Thanks.

Curve.JPG

TimHodson

Larry,

There a 2 possible reasons/solutions for this:

1. curve 40 to 39 has a negative radius, but it should be positive, or vice versa. Solve it by changing the sign of the radius.
2. you might see this when the central angle is 180 degrees. a 180° circular arc is neither "major" (>180°) nor "minor" (<180°) The way that the parcel editor makes the distinction, when the lines grid is not set up to show central angle, is by making the chord length a negative number for "major" curves (meaning with a central angle > 180°). Solve it by changing the sign of the chord length.

-Tim