Flight Recommendations:

Dense Vegetation

• Increase the overlap  (at least 80% frontal / 70% side ) and Increase the flight altitude (the higher, the better chances you have for our engine to match visual similarities between overlapping images in vegetation areas )

Water Bodies

• Increase the flight altitude (to cover more area per image) and Increase the overlap.
• At least 30% of the land area captured by the images should be visible.

Featureless Areas (Roofs, Metals, Buildings)

• Increase the flight altitude (the higher you fly, the better chances you have for our engine to match visual similarities between overlapping images in featureless structures) and, if the reconstruction is still undesirable, add images with different perspectives (Ex. Oblique imagery at high altitude that focuses on the target of interest, avoid using images that show the sky or the horizon)

Dense Snow

• Increase the overlap (at least 80% frontal / 70% side ) and Increase the flight altitude (the higher you fly, the better chances you have for our engine to match visual similarities between overlapping images in highly vegetated areas). Delete blurry images.
• Images should contain at least 30% of the bare ground or any other clearly distinct features.

Note: Images with 100% area covered in dense featureless snow, will most likely not be able to generate key points for a correct reconstruction.

 

Filter out/ Avoid using images described below: 

In general:

• Avoid any blurry images (due to fog, dust particles, heavy cross winds), and remove photos captured on takeoff/landing and traveling to/from the flight area. 

• If oblique imagery is included, it must have at least 80% overlap on every side (top, bottom, left, right) and the object of interest should be centered in each photo.
• Avoid capturing the horizon or sky as that will affect your photogrammetry results and time of delivery significantly.

 

• Avoid capturing areas with a lot of featureless surfaces like water, reflective or featureless structures like roofs (repetitive metal sheets), and dense snow areas.
  
  

• Avoid capturing areas with dense vegetation.