In 2018, I took a drone mapping class, and the instructors glazed over how the CP data was collected. At the end of the class, I asked myself the question, "What is northing/eating, etc., which started my whole journey down this road. This is insane tech.
At $6000 for the ViDOC alone (without mobile device), it's priced about the same as Trimble's similar unit (surprising as Trimble is typically triple+ the price of generic devices, lol). For clarification -- This is not using RTK, alone, to obtain coordinates. It actually uses the IMU's/photogrammetry to substantially improve accuracy with a concept similar to least-squares (to simplify it).
@@RamiTamimi - Yes, I'm aware, that's why I had mentioned it ;-). There are also two generic alternatives that are thousands less; however, not really on-par with professional "survey grade" gear. Although there are benefits because one is a separate software package that is compatible with several different RTK hardware options.
@@RamiTamimi Trimble has a "similar piece of hardware" but it is not the same idea, and not used in the same way. I dont think i need to explain tilt comp as im sure you are fully aware of what it is and how it works, but comparing the Iphones IMU application to trimbles tilt IMU is a complete apples to orange comparison. Question, with these videos are you attempitng to show that these are cheaper alternatives for RTK rovers + scanners? Or are you merely showing how much more accurate consumer level tech is getting? I can definitely agree that the consumers level stuff is getting better and better each year, but i notice with a lot of your videos if anyone even mentions industry standard equipment that you are VERY quick to try and defend the cheaper and objectively less accurate equipment. Just curious on your actual thoughts to this stuff and your actual in field experience with either leica or trimble rovers/total stations in the last 5-7 years.
That metric measurements in the end really helped for me ahhaha thank you for that and thank you for the vid. Ps. I'm not an IPhone user nor a surveyor. I'm a civil engg. student btw, but that IPhone makes me want to have one hahaha and your vids are really great thanks
When I saw the the metric table, I thought it was good for the public but mediocre for survey. Then I realised that the delta of 3.99 cm is larger than an inch. Your covert ion is correct for mm. At 3.99 mm that is good damn good!
Some time ago I have followed your work and I think the concrete and precise explanations are excellent. I identify a lot with your work since I carry out topographical work with drones and lidar scans. I have supported myself with your knowledge on some topics. I hope you continue to share that knowledge, they contribute a lot.
I'm not a fan of iPhones but with the advance surveys you have been demostrating in your recent videos makes me love to have one. I think I will order for the pix 4D RTK and the iphone 13 pro for my minor survey where less accuracy is required 😊😊😊
Gracias por compartir la experiencia, sin embargo para que lo que comparte en los videos pueda tener más alcance, sugiero colocar subtitulos en español
Great to see the evolution of your videos testing the iPhones LIDAR. I wonder if you added a gimbal that could support the weight of the iPhone+RTK if it would further improve the accuracy.
You were holding the phone very close to the target object, so I suspect the relatively high accuracy you see is mostly attributed to the GNSS (RTK). It would be interesting to see the result if you repeat the experiment by holding the sensor (phone) further away from the target points (once above and once in a 45-degree angle). The theoretical edge case is holding the phone in zero distance from the target points - in that case, you would expect to get the GNSS accuracy + sensor noise.
How large of a property could you realistically scan by walking around in a grid? 1 acre? Larger? I'm very interested in this for pre-construction planning for my team and would like to be able to walk the site and capture everything. I'm hoping 2 to 4 acres wouldn't be hard for the technology. Would it only be limited by storage space on my phone or ipad? Thanks so much for this video, I'm extremely keen to go this route instead of drone mapping for scanning the site and having the team be able to look at it online and be able to take measurements while we are planning the builds. Cheers Rami
I’m not convinced that a gimbal would improve the results. What the gimbal does is improve the iPhone’s ability to track its position in relative to the scene (improves SLAM accuracy). The ViDOC most likely has an even better positional tracking that Apple’s Visual-Inertial Odometry tracking. That all being said, it’s worth the test! Also, with any test I see on these video, we only see a sample size of 1 test. We should be seeing the scan of the walkway 3+ times to see if these is variation across captures. I’d like him to walk up and back down the slope. Rotate around spots, etc. this was a limited test that gives us a good idea of the accuracy, but not the full picture.
It's very interesting to combine RTK with LiDAR of iPhone. The comparison to total station, too. But how to make sure of the phase center between RTK and LiDAR? There is some kind of system error. PS. My advising professor graduate from Ohio State University. The campus is very beautiful.
As usual very useful video. So I've a question ? I see you've made a video where you show us the use of the Dji Osmo with your Iphone to have less vibrations and shakes when you're using the Lidar sensor of yout Iphone. So I wanted to know if it's possible to mount the IPhone attached at the VIDoc RTK Rover on the Dji Osmo Gimbal? Thanks for your attention. Regards. 😎
Hi Rami - I got to your channel while I was searching about something related to surveying - and I was really delighted to find its content - I had been working as a professional surveyor for 5 yrs long ago (may be 20 yrs ago) and now I am a full time civil design engineer (roads, highways, grading, stormwater, ..) - I had just one question if you could kindly help: I see announcement for a new GPS receiver Emlid - Reach RS2 which looks good - but I do not know anything about it - is it really good and can be attached to a data logger (I used to work on Trimble SSI that time)
@@RamiTamimi Rami, do you recomment it? i mean, i saw ur video and to me the send u the equipment to test and talk good aboth them, but in realuty the precision is there?
Why place a nail with flagging and put paint around it? You've totally defaced that nice ramp. Flagging ( a lot less btw as to not interfere with your photogrammetry) would have been enough, and removable post survey.
Funny you should say that.. a few months ago I did a topo survey on the ASU campus and started off by setting a bunch of mag nails with flagging in concrete/paver joints around campus for temporary/topo control. Maintenance crews came around after us and ripped all the flagging out, pulling some of the nails out with it. I didn't put any paint around the nails but they did NOT like the flagging. I just switched to small marker 'X'es which will have faded away by now. The campus folks really do care about the care and appearance of the grounds.
Can u make a test of circling around the house with garden, big height difference and with the difficult light (harsh light or twilight)? I sure, you will catch a big discrepancy between start and finish points. It'll rotate your trajectory, and won't short-circuit it.
It's always the same, they put a $100 ublox chip in a plastic container, add a $50 helical antenna, write a couple of lines of code and retail for $5000 When you bought for $10000 a Novatel receiver board in the past, everything was developed in house by hundreds of engineers, tested, developed, improved for ages... I still don't get it.
Hi Rami. Thank you for the videos. It is really inspiring ideas. As a quantity surveyor working on sites I was wondering if the Iphone can be used to calculate excavation volumes to some extend? This will be very helpful if excavations can just be documented before being backfilled. Thank you
So, I followed the link to the product. And found no price information. I even tried to go to - ORDER NOW. But, then it said - CONTACT US. So, what does this nice thing cost?
Our testing was a radically different story. Totally hit-or-miss on accuracy. Precision was God-awful. Error was reported to be 8mm. Actual error when validated with a 1" optical total station was 10.61 inches. No bueno. I wouldn't trust it any further than I can throw it after our testing. I'm curious how many takes it took to make this video with this low of an error.
That’s the useable distance for LiDAR only. PIX4Dcatch will always process with the images captured so your range essentially becomes whatever you can see in the images (more or less). I have catch projects with data well over 500’ away.
Soy de colombia 🇨🇴 es súper la herramienta q sé el iPhone con el sensor LiDAR pero he buscadas la antena RTK pero me comunicaron q para latino América no tienen mercado abierto por licencias q otra antena se puede usar
Rami.....great vid...... However, If I were OSU, i'd have you out there with a wire brush.....Pk (With ribbon ) AND PAINT....wtf......every point was at a joint, like you weren't going to be able to find it?
I SEE YOU used N, E, Z, instead of E,N,Z. I know a lot of surveyors that used E,N,Z, because of how software was written, back in the mid 70's. I had fully expected you to present E, N, Z(which to me is Blasphemous) Are students being taught to present coordinates, one way or the other?
It really doesn't matter, in the US we display the Northing (Y) first. The important thing I teach my students is to understand the terms and what they mean.
With a gnss with rtk i know exactly where the spike is and therefore where I'm measuring. Does this clip on think use the top of the antenna as datum The top left of the screen The top right Back ..front. Remember I'm use to 7 to 8 mm accuracy
@@RamiTamimi Right, makes sense. I would just be curious for a cost/benefit analysis. Your video on using the handheld gimbal showed the benefits were clearly huge for just a $50-$100 purchase. This is more like a $5,000 purchase, so I'm curious if the benefits are still worth the increased cost. Maybe it's way cheaper than a total station, but is it worth spending that much when your phone might be 80% as accurate?
Do you know if the viDoc can be used on a rod for more traditional survey operations? Like staking out? Or is it designed solely to be integrated with the lidar/camera?
Yes and no. There are mounts coming to attach it to a survey rod. You can also use it to take single point measurements. Currently you can’t lay them back out though.
@@RamiTamimi Would you need to set up targets on the wall to act as a datum to ensure ongoing accuracy especially if looking to repeat the exercise over a period to monitor for any progressive deflection
@@ryansweeney7992 I have the reach RS2 like you do, Rami. Can the RS2 output a Ntrip connection like you are talking about here to connect to the Vidoc?
@@RamiTamimi To piggy-back on this question: I understand you would need to use GCP’s if you lose fix. But will the scan be able to continue or will it stop when it loses fix? I’m wondering if I do a drone survey but want to supplement some areas that are obscured by tree cover with the vidoc/iPhone setup. Walking around under the trees to supplement you would be likely to lose fix. Do you think this would work for the scenario I’ve outlined?