How do I plot the boundaries of an RNP (Required Navigation Performance) RNAV (Area Navigation) containment envelope on a geoplot around waypoint coordinates in a flightplan?

I want to plot the boundaries of RNP 2.0 and/or RNP 1.0 on a geoplot for a flight plan, so that I can plot a flight path over the boundaries and see if I exceed the tolerance. I know the coordinates of the waypoints in the flight plan so I can plot the nominal flight path, but I want to plot the maximum allowable deviation so it can be determined if there are any flight path exceedances from the tolerance based on the actual flight path. I think there is probably a simple way to do this, but I have not been able to find it.