Drone LiDAR vs Photogrammetry | Epic Stadium 3D model

this football stadium seats 62 000 fans and covers an area of 20 square acres today on indiana drones we're going to be flying drone lidar and drone photogrammetry to make an accurate three-dimensional model of this entire facility so stay tuned and learn all about it and how we create an accurate 3d model on today's episode let's fly [Music] [Applause] [Music] drone mapping has gained popularity for its ability to provide facility operators and engineers an up-to-date and 3d model of the building and in this case stadium that they're working on you can right away understand that it'll be very difficult to design a renovation or an addition to the stadium without knowing exactly where everything was located now you could look at the cad models or the blueprints but that wouldn't capture any of the changes that have occurred over time or possible deviations that happened during the construction process so that's what we're out here doing today we're out here making an accurate 3d model so that way the engineers can make measurements off our model they can see the current landscape of the land and also update their cad models as needed now accuracy is absolutely critical you may recognize this device from the lidar land surveying video this is the emily reach rs2 gnss receiver and we use it to collect very accurate ground control points now after last week's video england reached out to us and agreed to sponsor this video inlet has been around for five years producing high quality and affordable gnss receivers the reach rs2 is their latest flagship multi-band receiver capturing gps glonass baidu and galileo constellations the reach rs2 has up to 22 hours on a single charge the hardware is light compact and very rugged now if you're ready to up your drone game and purchase one of these survey kits just use the link below in our description or the link up above in the video using this link helps us in providing and making great content for you we really appreciate it well let's go ahead and start collecting ground control points shall we the ground control point is the cornerstone into getting an accurate three-dimensional model now that i told you a little bit about these reach rs2 survey kits let's tell you about how they're working right now we have this one unit set up as a base collecting gps data and transmitting corrections over to a second unit this is called the rover when they're in communication this is getting two centimeter precise data at all times so let's go ahead and use this unit and go and collect some of those ground control points [Music] now we just finished collecting all the ground control points for our missions today now it's time to start planning the mission plans for both the flights so for both the lidar and the photogrammetry we're going to plan the mission to be doing a cross hatch pattern that's where we fly down and up the field and then also we're going to go at a 90 degrees and fly left and right this way we're going to collect data from every angle that way we're going to be able to represent and recreate this three-dimensional model really accurately and i just can't tell you how excited i am to see what this is going to look like in 3d and a 3d model so be sure you stay tuned to the end of the video to see all the results that we're going to get can't wait to show you but now it's time to fly let's fly [Music] this is going to make such an awesome 3d model we're flying the photographer the inspire 2 right now [Music] we just launched the lighthouse [Music] so welcome back to the studio in the office we just got done flying both that photical metric and the lidar mission at that stadium and i just finished processing both the data sets and i already took a look they look awesome but before we jump into looking at the lidar and the photogrammetric data i want to make a shout out for the indianadrones.com this is our new website where we are having a newsletter and we're putting blog posts we're hosting all this data so if you want to learn more about lidar photogrammetry industrial drones and everything of this topic nature we're going to be putting over there at the indianadrones.com just go over there and subscribe to the newsletter and we'll be getting you some cool information real soon now with that out of the way let's go ahead and just jump in and take a look at this data so here is the lidar data this is fantastic it looks really really really really good you can clearly see the edges of all the structures and the buildings and look at this structure right here very accurately captured we use that inlet with the reach rs2 to get ground control points to tie all of this data into the local coordinate system we did that same thing with the photogrammetry mission so now both the photogrammetry mission as well as the lighter data were all tied into the local coordinate system about two centimeters accurate so they're both accurate and precise so one thing i want to take a quick look at is these minute details and one thing that's going to make this really highlighted is looking at the bleachers i was curious about can we see in between the bleachers to where your feet go so getting down in between each one of those bleachers and taking an accurate measurement of that let's just do it visually and see what it looks like i think that looks pretty good that looks really good yeah we're actually able to get data in between those bleachers and capture in between those little areas that's very useful very useful and look at that hold on wow that's really cool i did not expect to see that but we actually were able to capture some information underneath the bleachers in this concession stand area oh that must have been from the opening yeah that's exactly what it was from the opening from these holes here where the stairs come up yeah the lighter came in and captured data wow very very cool very cool you can see here on the back side where we didn't get any data right there so it's all black well that was awesome that was the lidar data from the stadium now let's go ahead and pop on over to the photogrammetric data and see what that 3d model looks like so here we have our 3d model from the photogrammetry data so we use a software called dronedeploy to compute this in the cloud and it looks really awesome i mean look at that you can actually see all the lettering it's on the signage that's very cool very beautiful let's take a look at the buildings too very well done very well done always some missing data back here too but this is interesting see this so now when you have missing data in lidar it just isn't there but here it's still trying to stitch the stuff together even though there isn't really any data there now let's look at one other big key difference so as we were talking earlier about this minute data and these little details we check a look at the bleachers and we're trying to see in between them with lidar data let's do the exact same thing with the photogrammetric data now too so as you can see right here in the photogrammetric data it kind of blurs in between each seat and this is exactly what i was expecting now with photogrammetry in order to get these really crisp edges and see in between things you're going to need a ton of photos to resolve that and usually you just don't have that so when you have a situation where you have like 90 degrees or really close cracks or small areas it's going to just kind of blend over that and that's that's a very common effect you're going to see all the time you can even see it down here on these chairs and bleed bleachers um so right here where the the football players will sit yeah it looks very yeah you see it right there that's very common in photogrammetry that's what you expect and so that's kind of the difference when you would use lidar or photogrammetry to make a 3d model lidar is going to give you much more crisp data you're going to see in between things really well but then again you're using a much more expensive system and it cost more so if you just need to get out there and make a photo realistic 3d model you can do it this way with the with the inspired drone or a phantom drone or another camera drone and then you can actually go through and tweak it and tune it up a lot in the post processing as well it's just much more hands-on uh and and and the other big difference is that it's not a direct measurement you're actually computing this so whereas the lidar data this is more of a direct measurement sending out light it's measuring that distance and it's actually projecting it directly onto the ground so that's kind of the big difference well there you go that was the lidar and the photogrammetry mission you just saw the data from both of them i hope you guys can share with me what you think about this and when do you think one would be better than another one or what would you like to see maybe modeled with this technology i'd love to see that all in the comments below if you have any questions or comments just leave them down there i hope you guys like the video oh yeah if you want to see this data it's over at the indianadrones.com we have a blog post newsletter and we're gonna host all this data so you can go see it over there and if you have any questions leave it in the comments below hope you enjoyed the video uh we're gonna make many more like this so give us a thumbs up subscribe and stay tuned for the next one we love making these videos see you guys next time on indiana drones see ya [Music] start it up [Music]

Channel: Indiana Drones

Views: 37,426

Rating: 4.8775878 out of 5

Keywords: Lidar Drone, LiDAR, DJI, photogrammetry, BIM, 3D, 3D Model, dronedeploy, mapping, cartography, civil engineering

Id: _RNiWTJw3KA

Length: 11min 2sec (662 seconds)

Published: Wed Jul 29 2020

Reddit Comments

[u/IndianaTheShepherd]

"square acres"... smh

[u/clarksonswimmer]

Great content u/TheIndianaDrones . You do a great job of explaining this nascent field.

[u/aleskou]

Great share, as usual. Thank you very much.

[u/winslowkr]

u/TheIndianaDrones I like to hear your experience with using the Emlid RS2 and how it compares to Trimble equipment.

Do you like the iOS or android app? Was it easy to pick up?

Have you been happy with the results for processing in POSPac?

What should I know before buying that you didn’t know?