Basic/simple CAD routines support provides ease of work. Trim, Fillet, Mirror, Copy, Move, Extend, Object Snaps, Circle, Layers support, and so on.
Arnel M. Domag commented
@DanElder: I don't know what you really mean but line/pline is already in Fieldgenius. It is strange that circle and blocks are not supported. It is a basic cartography element.
as well as line, polyline