[postgis-users] Buffer() Arc Tolerance

[Richard_D_Levine at Raytheon.com]

If I use Buffer() on a point to approximate a geodetic circle, how do I
determine the arc tolerance of the returned polygon to the circle?

Is there any documentation that contains answers to questions like this?
I've read the PostGIS documentation cover to cover and the function
explanations are at a very high level (mostly copied from the OGC spec.)

Thanks,

Rick