GPS resolution- Android devices?

Hi there, wondering if there's a way to increase the routing resolution for "Straight Line" navigation.  I know our mobile device GPSs are somewhat inaccurate (3-10M with the latest dual-freq and android versions), but routing to a coordinate goes instantly from "50ft" (or thereabouts) to "Arrived".  

I have a rather odd use case.  I'm trying to mark the corners of a property while I await a proper survey.  I have the coordinates and am trying to get as close as I can.  There's only one point with a survey mark.  

So is there any way to tune for better resolution?  is it better in any of the premium versions?  Thanks!