This article will provide you with some notes and reminders when performing a mapping survey using a drone.
- Flying higher means fewer photos are needed to capture an area. Doing this, however, decreases your accuracy.
- Use front overlap of 80%, and side overlap of 70%. These settings will give the best results for most surfaces.
It is recommended to capture more than what you need, as it is easy to delete data. If you capture too little - you will need to re-fly.
- Ensure that you have full terrain coverage when using terrain following. This means that everything has to be covered - mapping area/ area of interest, take off/landing area, and everything in between.
- If you are not using Flight1, ensure that altitude optimization is turned ON, and distortion correction is OFF.
- If flying with RTK, confirm that the solution is “fixed” before takeoff.
- If using PPK, ensure your base logging file begins 5 minutes before your flight and continues 5 minutes after your flight.
Always ensure that the SD card has adequate space before flying.
Photogrammetry will NOT work at night.
Best capture conditions are in bright constant conditions. Ideally, an overcast day. Moving shadows will create issues in captures - try to avoid sunrise/sunset if possible
Drone Camera Settings :
Camera Ratio 3:2
Gimbal Angle: 90
Shutter Priority: Disabled
- Distortion Correction: Disabled
- White balance: Set to conditions
Metering mode: Average
- Altitude optimization: ON
- Exposure program: Manual / Auto ISO
- Metering Mode: Average
- Exposure Mode: Manual
- White balance: Auto
- Shutter speed: Auto
- Aperture priority: 5.6
Exposure value: 0
First waypoint: Infinity
Camera trigger: Distance Based