2-D Plane software available for a set environment within a control space

Non-electrical here so bare with. I'm trying to make my RC cars into automatic with decision making programming within a control space. Im placing GPS trackers on the RC cars similar to the available Tile trackers people can place on iPhone/wallet/etc. on the cars and I would like to create the control space they operate within. I want to pull a wagon/device/you name by a rope around for example a big field. After I pull the wagon around the entire perimeter by avoiding possible obstacles, is there a software it can propagate my desired boundary on a screen for positioning?  Location of RC cars within that created 2-D space on a simple software. It can be blocks moving around my created perimeter on a 8-Bit screen for all i care


I'm aware they do this for motion tracking with movies by creating a 3-D environment but being that my cars only operate in a 2-D environment can it be simplified to not having to have markers around my perimeter. GPS on micro scale and 2-D instead of 3-D. Solely a calibration of perimeter sequence at the beginning to determine boundary and then Bam! Boundary is set. Now time for RC Dual of Death within the Boundary I marked by pulling the wagon/device/etc. 

How big is this field?
The biggest potential problem I see with this is the position resolution of the GPS trackers in a small area.
Sounds similar to applications I've seen for ARPS (Amateur radio Positioning System) where during an event they have safety cars with trackers and a screen to show where they are. But this is on a large scale (several miles) so not sure it would work for you. Plus you need a ham license. But you could put together something similar...

Elizabeth, 
Thank you for getting back to me. The field is about half a football field roughly (50 yards x 50 yards). Ill look into the ARPS your referring to as well as the necessary steps to acquire a ham license.