Flying Large Sites with Propeller PPK and AeroPoints
A single AeroPoint is can cover up to 150 acres (60 hectares) if the AeroPoint is centrally located. The expected accuracy for one to three AeroPoints on 150 acres is 1/10ft or 3cm.
When on a local grid, we recommend using three AeroPoints to correct for the small amount of error related to the rotation scale and planar shift in locally-calibrated sites.
You can add checkpoints (CPs) to help benchmark accuracy between AeroPoints.
Total area: less than 150 acres (60 hectares)
Total area: 150 acres to 300 acres (60 to 120 hectares)
Place one to two AeroPoints every 50 acres (20 hectares) to maintain whole site accuracy.
Distribute the AeroPoints evenly across the site, horizontally, and vertically.
Checkpoints (CPs) are your friend! CPs help our teams conduct quality control on the data and note any shifts between surveys.
Total area: over 300 acres (120 hectares)
For sites that are larger than 300 acres, you will need to leapfrog your AeroPoints to cover the whole site.
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 five-hour time limit.
The others can be turned off, moved, and turned back on to continue the survey. Your AeroPoints should be placed every 50 acres (20 hectares).
Please contact your customer success representative for assistance with leapfrogging on a very large site.
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 email@example.com.