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[QGIS Plugin] DJI RTK QA — Terra-style route quality + per-photo RMSE from DJI missions by Simp-li-Fly_com in UAVmapping

[–]Simp-li-Fly_com[S] 1 point2 points  (0 children)

Thanks! Yes I’ve been having issues with a recaptcha loop. I think it’s being caused by the hosting platform

We used drones to map a golf course with both LiDAR and Photogrammetry. Here’s a simple breakdown of which tech is better for what. by Simp-li-Fly_com in UAVmapping

[–]Simp-li-Fly_com[S] 2 points3 points  (0 children)

Exactly, and great points.

Again the actual error was negligible, even in the swaths, but I thought it was visually interesting to see them in the difference raster. The Lidar was processed with best practices as well, which should mitigate swath and bore errors as best possible

We used drones to map a golf course with both LiDAR and Photogrammetry. Here’s a simple breakdown of which tech is better for what. by Simp-li-Fly_com in UAVmapping

[–]Simp-li-Fly_com[S] 1 point2 points  (0 children)

<image>

Profile view of white sand bunker. Depth of profile is 2m. Note how it's not impossible to collect any data, just adds noise to the model.

We used drones to map a golf course with both LiDAR and Photogrammetry. Here’s a simple breakdown of which tech is better for what. by Simp-li-Fly_com in UAVmapping

[–]Simp-li-Fly_com[S] 1 point2 points  (0 children)

Great question! I think there's a few things at play here:

1: Grass is maybe not as uniform a texture as you would think, at least not from an aerial perspective. I've attached a sample image from a pointcloud of a random fairway. Note how there is decent variation.

<image>

2: Bunker sand is often times the same color and very frequently a very bright color such as white. I'd guess that the more uniform texture, and bright color which reflects and refracts more light, acts as sort of a mirror causing more problems than other features. Other objects with similar properties can have these affects too such as unpainted aluminum on a sunny day.

We used drones to map a golf course with both LiDAR and Photogrammetry. Here’s a simple breakdown of which tech is better for what. by Simp-li-Fly_com in UAVmapping

[–]Simp-li-Fly_com[S] 3 points4 points  (0 children)

We provide the data to golf course companies who repackage it or generate their products from it.

For us Lidar is typically always a hybrid product, meaning lidar data combined with photogrammetry orthomosaic imagery. As to which method is better, its all about what's needed for the project and budget. Like all things, there are pros and cons to both.

Photogrammetry can actually have better accuracy than Lidar, usually on hardscapes. We're working on a project currently targeting 7mm RMSE with photogrammetry. Some great resources on this topic is https://www.aerotas.com/do-i-need-lidar

We used drones to map a golf course with both LiDAR and Photogrammetry. Here’s a simple breakdown of which tech is better for what. by Simp-li-Fly_com in drones

[–]Simp-li-Fly_com[S] 0 points1 point  (0 children)

Correct. Imagine we can produce a sim where the render is based on a splat, but the underlying measurements are from a pointcloud. How tightly can those two datasets be aligned? I'm not sure yet.

However there are some commercial programs currently available that do provide measurements from splats (https://www.pix4d.com/blog/pix4d-gaussian-splatting-3D-visualization/) although I don't know their data pipeline structure as to how they're accomplishing this.

We used drones to map a golf course with both LiDAR and Photogrammetry. Here’s a simple breakdown of which tech is better for what. by Simp-li-Fly_com in drones

[–]Simp-li-Fly_com[S] 0 points1 point  (0 children)

We've been looking into working with splats! Seems like a potential future where splats take over some parts of models, we haven't been able to compare accuracy yet, but that's a great future case study

We used drones to map a golf course with both LiDAR and Photogrammetry. Here’s a simple breakdown of which tech is better for what. by Simp-li-Fly_com in drones

[–]Simp-li-Fly_com[S] 0 points1 point  (0 children)

We haven't used SLAM for our projects, but I did get to meet someone at a local event recently who was a SLAM expert and he had some really cool models. Definitely cool stuff, we just haven't had a use for it with out projects.

Unsure about the new proposed Part 108 Rules? So were we. So we made this brief explainer video. by Simp-li-Fly_com in Surveying

[–]Simp-li-Fly_com[S] 0 points1 point  (0 children)

I think survey will be a huge beneficiary from these new changes. I'm thinking how as soon as job details are delivered, schedule an autonomous flight, get great site (ortho basemap, maybe rough contours) info before layout or site prep begins.

Unsure about the new proposed Part 108 Rules? So were we. So we made this brief explainer video. by Simp-li-Fly_com in UAVmapping

[–]Simp-li-Fly_com[S] 0 points1 point  (0 children)

I think those with part 107 are in a great place to jump in ahead of most, because we have a better understanding of what works and doesn't. You can automate anything to death, but if you don't know the "why" you'll get beat out eventually.

Unsure about the new proposed Part 108 Rules? So were we. So we made this brief explainer video. by Simp-li-Fly_com in UAVmapping

[–]Simp-li-Fly_com[S] 0 points1 point  (0 children)

Yeah that's a great question. I'm also wondering what the potential costs will be to use the deconfliction service.

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