Mga Paalala sa Pagpapalipad

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

Ang Humanitarian OpenStreetMap na pangkat ay may mga patnubay tungkol sa 'pagpapalipad ng UAV mapping <https://uav-guidelines.openaerialmap.org/>`_:

Ang mga nailahad na patnubay ay nilalayon sa paggamit ng drone mapping ng mga isla, ngunit ito rin ay magagamit bilang pangkalahatan na sanggunian ng mga drone mappers.

Maaari lamang na tingnan din and patnubay ng DroneDeploy sa Paggawa ng matagumpay na mapa, ito ay nagbibigay ng mga karagdagang kaalaman tungkol sa pagpaplano ng nga misyon.

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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