In InRoads Survey, the EXTARC code takes a PCODE ST PC, PCODE, PCODE PT EXTARC to close a circle, following a begin with PC, a midpoint and a 3rd point as a PT followed by the EXTARC code. However, in some versions, it would draw the circle but also draw a straight line from the PC to the PT.
I have not tried this in OpenRoads Survey and cannot find a list of default "Linking Codes" that are its equivalent of Control Codes.
I have not tried this in OpenRoads Survey and cannot find a list of default "Linking Codes" that are its equivalent of Control Codes.