Following up on this thread and the new geofencing system in the DJI Go4 software. I flew the site referenced above again on Dec 13th and had no problems with the DD app. The site is located on the outer edge of Class C airspace (400 agl) and I applied for and received authorization through the stand alone AirMap app. The site was located outside of the modified bow tie authorization zone that now displays in the current version of the Go4 app so no DJI unlocking was necessary. DD performed flawlessly.
A second waypoint mission using the DJI GSPro app was attempted and it failed with the same “loss of GPS” fault as on the previous attempt. I had to return manually. I flew a standard mission with the DJI Go4 app to obtain the required oblique photos without a problem.
Around the same time, my co-worker attempted a DD flight in Greenville at a location that was within the DJI Authorization Zone. This mission was within a DJI Authorization Zone which he obtained via the DJI website: [https://www.dji.com/flysafe/self-unlock.] DJI’s authorization limited flight altitude to 100 AGL, The flight geofence also had a corner which extended into a red DJI “bow-tie” zone for which DJI states that “authorization is not available”.
AirMap and the FAA Maps showed the area as requiring LAANC Authorization (with 300 AGL max) for which an authorization was received through AirMap.
When the DD mission was flown (at 100 AGL - the drone would not fly higher) the drone performed fine until it reached the edge of the DJI unauthorized bow tie zone at which time it stopped and hovered in space. The bow tie zone could not be entered using either DD or the DJI Go4 app.
So clearly there is a discrepancy between the FAA LAANC Zones and the authorization zones in the DJI Go4 app. On the DJI website listed above they have a procedure for “custom unlocking” via email. It requires the submittal of written authorization documents from the agencies having jurisdiction and, obviously, appears rather tedious and time consuming. We have not attempted it yet.
This DJI vs LAANC discrepancy seems to appear at every airport with controlled airspace. I am not sure if the DJI system is ahead of it’s time and the LAANC clearance zones will be modified in the future or if DJI is just “taking a flyer” so to speak with their own system. Clearly it can be a nuisance in those instances where flight is allowed by the FAA but DJI’s software interferes.
Sorry I don’t have an easy fix but, hopefully, our experience will help other to understand whatr they can expect.