Kiat Menerbangkan
Data collection effort, full 3D
For best in class results with full 3D reconstruction, we recommend the following:
60% overlap nadir flight
70-80% overlap 45-degree gimbal angle cross-grid
The 45-degree cross-grid flight provides the basis for a fully tied together model, while the nadir flights provide the necessary texture for orthophoto texturing. The lower overlap meets the minimum requirement for orthophoto products as facilitated by by feature matching from the much higher overlap cross-grid.
Data collection effort, 2D and 2.5D products
For best in class results 2D and 2.5D products, we recommend the following:
70-80% overlap slightly off-nadir (5-10 degree off nadir)
For more complex buildings and vegetation, aim for closer to 80-83% overlap. If buildings, vegetation, and terrain changes are not complex, it's quite feasible to use closer to 70% overlap.
(credit: derived from ongoing conversations with Ivan Gayton, Humanitarian OpenStreetMap Team)
Other resources on flying
Tim Humanitarian OpenStreetMap memiliki petunjuk bagaimana menerbangkan UAV untuk pemetaan:
Kiat berikut ditujukan bagi pesawat nirawak untuk kegiatan pemetaan di kepulauan, namun dapat dimanfaatkan untuk pemetaan menggunakan pesawat nirawak secara umum.
Lihat juga panduan dari DroneDeploy untuk Membuat peta yang diharapkan, yang menyajikan kiat-kiat untuk perencaaan misi terbang.
Finally, lens distortion is a challenge in projects requiring accurate 3D data. See our section in these docs on Camera Calibration.
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