When flying a corridor project, the known point (or benchmark) must be centrally located. If you have multiple AeroPoints, place them every ½ to ¾ mile (0.8 to 1.2 kilometers)

If your site is set up on a local grid, the known point (benchmark) must be the first point down and the last one up. 

The AeroPoint can be on either side of the corridor. We recommend placing checkpoints on important surfaces.

Six AeroPoints 

Maximum distance: 4 miles (6.4km)

Six AeroPoints + Checkpoints

Maximum distance: 4 miles (6.4km)

Six AeroPoints Leapfrogging

Maximum distance: as much as can be covered in 5 hours of flight time

If you do this, you must place a known point (benchmark) down first. Pick up this AeroPoint last. It has to be on and undisturbed for the whole survey, which has a 5-hour time limit. 

The others can be turned off, moved, and turned back on to continue the survey. Your AeroPoints should be placed every ½ to ¾ mile (0.8 to 1.2km). 

One AeroPoint

Maximum distance: 1 mile (1.6km)

We do not recommend only using one AeroPoint to fly a corridor project

If you must, you can use one AeroPoint to fly very short corridors, but the accuracy degrades after one mile. The accuracy along that short corridor can be supplemented by using additional ground control points (GCPs) and checkpoints, but the maximum distance cannot be increased. 

One AeroPoint + Ground Control Points / Checkpoints 

Maximum distance: 1 mile (1.6km)

I still can't do it! 

We wrote these articles to arm you with everything you need to get the job done on your own, but we understand that sometimes this isn't sufficient.

If you're stuck, the Propeller hardware support team may be able to help. You can contact our support team by emailing hardwaresupport@propelleraero.com.au.