Photogrammetry/Drone Mapping mistakes you should avoid.
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- เผยแพร่เมื่อ 26 มิ.ย. 2024
- UPDATE: January 2024
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This video covers some of the biggest problems I learned the hard way. I only wish someone had told me the best way to build and process maps & 3D models. Not knowing what computer to use also cost me a lot. In this video, I break down what you actually need to know.
Links mentioned in the video are
store.emlid.com/?ref=gm6 - วิทยาศาสตร์และเทคโนโลยี
That tower model is amazing!! I would love to know more about your workflow for the cell tower models!
I'll have something on that soon. It may be the end of December though.
I have the same question. I am litterally trying to do Scans from Towers and cant get it done whatever I do... It always Looks like shit😫
@@janoti6073 Is it a tower like the one in my video, or is your tower an SST, or a guyed wire?
@@GM6DroneMapping different right now I am trying to Scan a Tower exactly like the one you showed.
But I want to learn how to Scan Towers in general. eg Steel latice masts as well
@@janoti6073 so that is called a SST. Self Sustaining Tower. There is a lot to modeling those and guyed wire towers. Its not just how you collect the data but how you process it too.
thanks so much ]:) very kelpful info
Thank you for letting us know.
Yup, same as last comment - accuracy is so important! As is being specific!
I'm not sure I understand. Was the video not specific enough?
The Mavic drone that you have in the description would would allow for georeference tiffs? If I am looking to do geotiffs for digitizing would you think its necessary to have the RTK built in?
Jake, most drones can create a geo referenced tif. So yes the Mavic can too. As far as I am aware all the DJI drones geo tag every image which allows it to be processed to a geotif. As for RTK onboard the drone, you definitely do not need it to create geo referenced orthos. The RTK with give you more accuracy, but the level of accuracy you need depends on what and for whom you are mapping. I know that may be a little vague but there are so many factors that go it your final map and you only need it as accurate as it needs to be for the purpose it is needed. Hope that helps.
Thanks for the information you are providing. I am trialing Pix4D now. Was going to go with AgiSoft/Metashape but ...I like the react software and it seemed more mainstream to have P4D. Still not too late for my trigger pull. I am using a Phantom 4 Pro (non RTK). Waiting on the delivery of a FW with a Sony A6000 and Geo Snap Express. So much to learn! I am going to look for your accuracy video. If I have the minimum 8 Cores and want to 3D model, am I trying to swim upstream with Pix 4D?
Yes, You would be swimming up stream in a very cold stream. Pix4d just can not come close to Agisoft with regards to 3D modeling.
@@GM6DroneMapping Good to know. I just paid for a month of P4D mapper. Glad I didn't buy perpetual. I think I'm going back to Metashape. My main concern is providing a deliverable and if I switch gears, am I that much further from getting results on someone's desk? Or, is AgiSoft simple enough to take what I have learned from P4D? Truthfully, after a little work with P4D react, I am not too impressed. It is nice to crank out something useful but its only good for situational map reading / relative basic accuracy. Nothing you want to splash on your website.
Furthermore, I am selling UgCS FYI. If you or anyone you know would like to tap into drone based GPR let me know.
@@nathanmaplesden1746Hello what’s your recommendation for a beginner between Pix4D and Agrisoft ?
Accuacy is important.
Great video
Thank you
Great video.
what applications do you recommend for viewing obj files
Thank you, Agisoft now has a stand alone viewer that you can download and even share with clients. I think it is the best.
www.agisoft.com/downloads/installer/
@@GM6DroneMapping thank you so much
Great content! +1sub absolutely
Welcome aboard! and Thank you......
Hello.
I believe your annotation regarding the courshub hosted training may be flawed. The base URL (courshub) is resolving to an unfinished WIX page, and the registration page is not responding to submitted requests.
Are those pages currently under your control? It appears suspicious rom a cybersecurity perspective.
You can login here
learning.courshub.com/
NEW GUY HERE! Great info! It still sounds that RTK needs work. I want to get into mapping, but it is still overwhelming. WHERE to start, what is the best drone, and then what is the best SW to use and share with clients? I have a DJI M2P and then found out is not what I need/want to use for inspection nor mapping. Oh yeah I could do RE are $20/hour. I want to go into GAS/OIL, SOLAR, and towers, mapping...
Welcome aboard George. That is a lot of information to give at one time. Shoot me an email and Ill point you in the right direction. guardmy6@gmail.com
I have to process a large orthomosaic and densified point cloud. The project will have over 8k pics. I'm dreading processing with Pix4d mapper as it's going to take forever! Is Agisoft faster and will the quality be as good?
Yes and yes
Also which orthophoto viewer or 3D Model viewer do you recommend? Thank you in advance for your reply.
Well Capt. Jack that is difficult to answer on the 3D model. But probably Agisofts viewer. For Orthos it's any viewer that opens it. I use QGIS most of the time.
Hard drive space is inexpensive, but after awhile, it becomes difficult to manage. I am curious how you store and archive your data (UAV photos, orthos, point clouds, meshes, etc)?
Tripp Lowe, that is a very good question and my answer is kind of detailed. I store all achieved files on disk drives. I have 4 or 5Tb between them. I run all software and projects on a couple of SSDs. After I send the data to a client I leave it stored in a cloud for about 90 days before I delete it. In every project, I store the images in 1 folder and all the deliverables in a labeled folder where the images and project files are. Sometimes I move the whole project from the SSD immediately sometimes I do it later. For every project I do, I use the same labeling format. Since I use Agisoft I do not really need to keep deliverables in the project folder as I can export on demand. So it depends if keep the Orthos, Mesh, etc.
Not only does the acuracy have a lot of crumbs, all the points have them. Anyone who is not into these things could say, you really haven't said anything, but it's not true, you have touched many important points to do a good quality job. Well said and thank you 😀
P.S.: That tower makes me drool, it's still my Achilles' heel 🙄
Lol. Thank you for the tower comment. No doubt they are hard to model. The guyed wire and SST are the hardest to process for me but they all can be frustrating for sure. Let me know If I can help.
Every time I map something I learn. You are exactly right, the accuracy stuff has a lot to it.
@@GM6DroneMapping Thanks for sharing this information. Do you have any tips on making a more accurate model like your tower example? I imagine a tower is one of the hardest models to make since there are so many small gaps in the structure. Did you have to do a lot of manual 3d modeling to correct mistakes made by the photogrammetry?
@@mobileandmonitoring2810 to be honest, I flew every tower almost completely manual. The only automated flying was point of interest. To get around the array.
Hello, thank you for this beneficial video, I have a question, say I want a client to view my 3D model but not on the agisoft software, what file format do I export my 3D model and what software can my client use to view it ?
It depends on the file size. .obj is the most common. And there are a few decent viewers. Google poly is ok. Google earth is good but takes a while to load.
@@GM6DroneMapping thank you for your response, can the client get measurements from Google Poly?
@@hafeesogunfowora6866 no. Why dont you email me. I can help a little easier then.
Okay, I would love to do that, where do I find your mail
In regards to photogrammetry, how does the Anafi AI compare to Skydio 2+?
I haven't used either of those, but it depends on what you are mapping or modeling. The smaller the camera sensor the closer the camera needs to be to the object you are capturing.
Do I need to have a survey license or degree to do mapping?
Well, yes and no. To give someone a map to be used as a legal survey then yes, unless your client is a surveyor. In some places you can create contour lines without a license but you need to check your state if in the US 🇺🇸.
There are more use case scenarios than not where you can use this technology for purposes other than surveying.
What is the website you mention at 1:32?
I guess I need to make a change there. Indshine. Com. They went out of business during the pandemic. 😞
What is the name of the website you mentioned that you can upload your map?
Which 3D Model viewer do you guys recommend?
www.indshine.com
What format do we export the file to, in order to upload on this website
Funny how accurately you spelled accuracy.
It's because accuracy is relative. Personally, I always think that is funny. But I may be to easily amused. Haha
I forget, do you use an RTK drone? or manually align it after.
I was using an RTK drone but went back to manual alignment. I'm building a drone now and plan to test the RTK on it more. I just don't trust the results enough yet. That's the reason I went back.
Real words of wisdom - thank you. I would also love to know more about your workflow for the cell tower models.
@@FlyingMerf thank you. A lot sweet and anxiety went in to the process. Ha. Feel free to shoot me an email. We can talk offline.
GM6 Drone Mapping same here. I've tried rtk, ppk and tested the accuracy with GCP's and I couldn't get the accuracy favorable. Most of my clients are using a local calibration with plenty of their own benchmarks. Rtk/ppk don't like that. You might get better accuracy when you survey over a baseline with 1 benchmark but I haven't done a lot of testing that way. You gave some good tips, very useful, thanks!
@@HenloduToit thanks, what I was referring to above was the RTK on the drone. I use RTK either on a benchmark or I will create one. Most of the stuff I do does not need to be absolute. I use GCPs on the ground because I trust that more.
GIS you mean Esri products (Arcmap and ArcGIS pro)??
Yes sir, to also include QGIS.
You mentioned a file upload to something that sounded like inshine.com What was that link? I could not find it. It went to some chinese company.
Bill, unfortunately they went out of business at the start of the pandemic.
@@GM6DroneMapping Thank you. I am new to mapping and am trying to work out things before I offer it as a service. I bought WebODM but I do not find a way to share the maps with customers. Agisoft seems to be a good bet. I really like your videos and appreciate your approach in the mistakes to avoid video.
@@therealbillrichardson Thank you for letting me know its been helpful. We also have an in person training coming up. Check it out if you're interested. gm6.io/uas/
You misspelt accuracy. Was that deliberate :)
lol good catch. Yes, it was intentional. Kind of like accuracy is relative. It was funny in my head, late at night when I put the video together. : )
Haha, yeah I picked up on that. Thought it was a joke too. :)
At the 1:34 mark I could not male out what you said to use as a option.
Something "chime". Sorry I am tone deaf.
Lol. Its not you. I said it fast. indshine.com is what I said but they went out of business during the covid pandemic. It was a great platform.
Hi
Sometimes, when I fly at a site with big height variation I tend to get unfocused and blurry pictures, how do I overcome this issue?? I use pix4dcapture
First thing is don't use Pix4d capture. It doesn't let you make the adjustments you need to your camera. Email me from the about page of my channel and I'll see if I can give you a few tips.
“A regular disc drive”? Do they still make DD/DS floppies? (ha ha just messing with ya brah. Mahalo for the video. Good advice to this newbie. )
Ha ha. I forgot what they call them and that's what popped into my head. Glad you liked it. Enjoy that nice weather for me. 👍
You have made an error on spelling of Accuracy..now if this is the most important element you have just destroyed your credibility to any client
It was intentional, a pun. Because accuracy is relative.