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.

[DanPatterson_Retired]

simplify from an arc  to a polyline or try splitting it

[LarryGaudieri]

I am needing to find a solution to this...it's like Parcel Editor doesn't like these circular curves...the easement parcel was a polygon class and loaded into the fabric....then it broke...there has got to be a way to split this or do something other than trashing the parcel...anyone?

[TimHodson · Accepted solution]

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

[LarryGaudieri]

Again, thank  you Tim....changing the sign of the chord length worked. Thus far in my fabric (I mean, how many of these could there be?) I haven't had a curve like this so I wouldn't have imagined that modifying the value for the chord distance was a "thing"....