This article will provide you with some notes and reminders when performing a mapping survey using a drone.
Best Practices:
- 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.
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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.
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Always ensure that the SD card has adequate space before flying.
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Photogrammetry will NOT work at night.
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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 :
P4R
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Camera Ratio 3:2
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Gimbal Angle: 90
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Shutter Priority: Disabled
- Distortion Correction: Disabled
- White balance: Set to conditions
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Metering mode: Average
M300
- Altitude optimization: ON
- Exposure program: Manual / Auto ISO
- Metering Mode: Average
- Exposure Mode: Manual
- White balance: Auto
- Shutter speed: Auto
- Aperture priority: 5.6
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Exposure value: 0
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First waypoint: Infinity
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Camera trigger: Distance Based
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