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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

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Accepted answers

TimHodson

Larry,

There a 2 possible reasons/solutions for this:

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.
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

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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

Larry,

There a 2 possible reasons/solutions for this:

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.
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"....

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