400 Acre site guidelines

Hi Harrison, great news… My first paid lidar project is a 400 Acre site!

Can you give me some guidelines on how to handle that large of a project?

Thanks a bunch! Jim

Are you able to share me a KML? Then I can give you a little more insight into flight planning.

Hey guys, I have a similiar sized site and figured I’d jump in and share a kml. One thing I have noticed is that I capture a ton of area outside my KML on my m300 using the R2A specs. Wondering if we can eliminate some of that.

https://moorebass-my.sharepoint.com/:u:/p/dwindham/EdWUsKFxO2lDuFMwUK31Lq0BKOPF79aJOK3YOtSzg0afRQ?e=LWifC4

Yes you can! If you go into the PCMaster application when you are post processing there is a cloud filter button. What you are going to manipulate is the angular rotation values (default is 0 and 360). As we know the Avia LiDAR sensor covers a 70 degree area.

The center point of that 70° is 270°
Start point is 235°
End point is 305°

You can shave whatever you like off of that by taking it equally from both sides. I.E. (240° and 300°) would make that 70° 60°

Hope that helps, please share your results.

Oh that is helpful! I was actually meaning in DJI pilot app for flight planning but I will definitely use that too in PCMaster. Attached is a flight plan I just did from a KML upload on the smart controller. The shaded area is actually where I need topo but the lines go quite a bit past that - I am used to having some overlap in my photogrammetry missions but didn’t know if this much was necessary for the R2A. It does the same thing if you rotate the flight lines, etc. This is based on the custom camera settings I made from another post on here that y’all responded to me on.

Could you let me know which camera settings you are using. I would like to double check that they are correct. Also what was your flight height in this survey, and did you use terrain follow?

These settings

My flight height was 250 and no I didn’t - should I use that with the RTK? I don’t know that I have a login for RTK through our survey provider available but I can try. Speed was 15 mph.

Terrain follow is a feature of DJI Pilot for the M300. It was recently updated so that it’s fully functional. However it is not thoroughly tested as of yet, so you still want to be mindful of your height when using it.

You shouldn’t have to use RTK in order to utilize terrain follow as the DTMs are built into the world map. More info on that at a later date. Happy flying!

Thanks. Do you think my camera settings are correct? Appreciate if!

Wanted to drop in and offer this: I just flew a 400+ acre site on some really low parameters- the goal was not survey grade topo but I’ll probably still get that level of accuracy after the processing finishes from the looks of it.

I flew at 400 feet. No terrain following
20 mph
30% overlap

So far the data seems perfect for our deliverable which is “GIS Level” topo. I noticed on one side of the project a control point was .2 ft off - no big deal at all.

This is fantastic, nicely done sir! If you ever have any jobs like this that you’d be willing to share on the community please don’t hesitate to share a link.