Planning to fly a long oval track - Grid mission or manual flight?

Hello Rock community! Looking for advice on this project. Planning to fly a long oval track. Track measures 4,000ft long and 1,000 ft wide. Trees in the infield and trees around the outside. I am most interested in capturing the asphalt track only. Should I still setup a grid mission or somehow manually fly the track using the M300 fpv camera.
Any advice would be greatly appreciated!

It depends on if you want to capture the entire thing or not?

Considering that is less than 100 acres in size I don’t think it would be too much trouble to do the entire site. Just grid it up and cover it all at the lowest AGL that you feel comfortable.

You’ll easily end up with a 100 acre project simply due to the swath size of the AVIA. So be prepared for that and the rest sounds rather simple.

From personal experience, I would hand fly the whole track…
I would do my outside loop first, one in the middle and one on the inside.
Like Matt said, you will end up with plenty of data!

Make sure you set your camera to fire every 2 seconds… if you are doing asphalt surface analysis later, the imagery collected by the R2A will be VERY useful to the engineers… I’ve used data like this before for asphalt maintenance. It can’t be beat!

Make sure you have good ground control.

[FlyingRadioWaves]

Thanks for the recommendation! Indeed, I will have ground control all around the track. What have you found to be a good flight speed to use for this manual flight? I am looking to fly about 50-60 meters AGL.

Thanks!

As always the question of AGL for capture simple depends upon your desired output. If you want to see cracks in the pavement perfectly then you should fly lower/slower. If you are just looking for the contours at a 1’ interval then you can of course fly much higher and faster. For a good set of guidelines for your output, have a look at this article that includes the specs and a point density chart at the bottom that should answer your questions fully.

I would think, for your job, 5.0m/s would be a good start.

Slower/Lower = more detail
Faster/Higher = less detail

Its like a triangle… pick any two:
speed
height
point density

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Excellent. The point density chart is a huge help. Thank you!

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Happy to show off a few screengrabs from this weekends oval track LiDAR mission! It came out fantastic. Harrison’s excellent training videos was a huge help. The R2A was super easy to setup and use on the DJI M300 platform. I setup a Linear mission in the DJI Pilot 2 on the RC. The mission was a bit over 9 minutes. Amazing!




Sweet model!
Its looks good. :grinning:

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Thanks for all your assistance @FlyingRadioWaves! Worked out perfect.

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This is fantastic! I love to see the community come together!

How low/slow did you fly? How do the cracks in the pavement look? Try messing with the intensity view sliders to get them to pop!