How to Fix Drone Survey Accuracy Problems

The first time my crew lost an entire commercial site due to a two-inch elevation error from a drone survey, the project manager pulled the phone out and said this wasn’t acceptable anymore. We weren’t talking about backyard hobbyists flying around for fun — we’re talking about a 45-acre mixed-use development where grading specs were off by enough to cause drainage issues down the line. That day I started taking notes on every variable that could throw off survey accuracy, because if you work in commercial construction, one wrong measurement cascades into change orders and headaches nobody asked for.