Pix4D viDoc RTK on iPhone vs Survey Total Station

[@UAS2GIS]

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.

[@TheMuddman74]

The "minutes and seconds" to get more precise confused the hell out of me as well.

[@trollenz]

Thanks for the metric conversion 👌🏻

[@RamiTamimi]

No problem 👍

[@vincecerna14]

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

[@RamiTamimi]

My pleasure!

[@fernandorodriguez-xj9fz]

It’s amazing seeing someone so helpful and professional! Great Video! I actually use Pix4Dmapper, I’m gonna tape that iPhone onto a drone:) lol.

[@ryansweeney7992]

You can actually export the RGB images right out of catch and process them in mapper no problem! The results are really awesome

[@InspiredScience]

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]

Trimble's device has a similar idea, they're just a competitor to Pix4D.

[@InspiredScience]

@@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.

[@OnTheMountain]

@@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.

[@EduardoHernandez-du5bk]

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.

[@RamiTamimi]

Awesome, thank you!

[@Rogun987]

The fact you got those tolerances with the backsight after shooting 2 GPS points is impressive. I got a crappy setup and can be out .1 or more

[@justingmatthews]

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!

[@stacymadd]

His conversion is correct to cm. .107ft = 3.26cm=32mm I too thought mediocre for survey.

[@aminabdo9760]

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 😊😊😊

[@RamiTamimi]

Yea I'm just like you, Apple has impressed me with the LiDAR sensor and Pix4d with the viDoc RTK

[@hahost]

@@RamiTamimi what is cost this solution? Tanks

[@yaberalij7508]

as surveyor i apricate and i like the way u explanations too keep up bro

[@braddock149]

You can export all markers at one (annotation export as a CSV).without copying. Well done.

[@thepeeg2936]

I agree. CSV imports easily into MS excel. And it's easy enough determining which values are N,E, and Z.

[@nicxonpiaso6199]

I think your video is too detailed..That's a Surveyors workflow..Really appreciate this!

[@tadamb1]

Wow. That' pretty slick. I just need to convince my boss why we need one.

[@trollenz]

You actually don't

[@RamiTamimi]

Just send him the video haha

[@juliomsevillano5576]

Gracias por compartir la experiencia, sin embargo para que lo que comparte en los videos pueda tener más alcance, sugiero colocar subtitulos en español

[@RamiTamimi]

Mi plan es crear un nuevo canal con varios idiomas doblados

[@rickpedraza3106]

This thing is STUNNING

[@RamiTamimi]

I know right!

[@zebenkopchak1118]

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.

[@kevinkasp]

I was thinking the same thing.

[@frasersmith4552]

He’s already done a video using the DJI gimbal which reduced the drift error, improving accuracy

[@ryansweeney7992]

It will improve accuracy but you would need a more professional grade gimbal to hold the weight

[@georgeneyra5735]

Thanks for do this comparisson Rami, is awesome the lidar technology for Iphone's. Greetings from Perú.

[@RamiTamimi]

Thanks for watching!

[@TLTPhotography]

2000yrs later had me dyin’. Lol

[@RamiTamimi]

Hey man, those points take a while to set haha

[@carliones1]

Parabéns pelo conteúdo técnico e de alta qualidade.

[@RamiTamimi]

Obrigado meu amigo eu realmente aprecio isso

[@amirbarmaor]

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.

[@luiz231827]

I love your greetings videos from Mexico. We have the same station total

[@RamiTamimi]

Awesome, thanks for watching!

[@ahmedharon6155]

Thanks Rami for sharing knowledge 🙂💙

[@RamiTamimi]

My pleasure

[@abiez]

I don't know what I'm watching but he talks about it with such passion. So I just keep ion watching.....!

[@nplengineerhub]

Nice informative..

[@northbayride8730]

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

[@alexanderbruchhaus5984]

Hey. Cool video! Why didn‘t you use the gimbal from previous video? Maybe you can push the accuracy even further✌️

[@avriljil]

I agree

[@TLTPhotography]

I’m not sure the gimbal would support the weight of the RTK device and phone… just a thought. Might not be able to grip it well enough either

[@threedservices6064]

If you have a gimbal that can support the weight of the iPhone/iPad + viDoc, you will generally get better results with a gimbal

[@alexanderbruchhaus5984]

I agree with you guys. Maybe he will upload a video with a compatible gimbal. I am excited for the results :)

[@thenerfguru]

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.

[@shadisafwan2025]

Hallo Rami This is Safwan Massad I am in Jacksonville Fl and in 50 county’s in Ga Would love to share some information with you Great work young man

[@stacymadd]

Great video, just wondering if you could set the RTK to a local uhf freq. this would be all time.

[@ArjayMartin]

can you attach the gps pack and phone in a cheap drone, then get an expensive RTK drone for cheap?

[@JOFEGUBA]

That is a brilliant idea, havent thought of that

[@ArjayMartin]

Please do it... and compare to a proper RTK Drone? Don't forget to credit me please. Thank you!@@JOFEGUBA

[@historialchannel88]

Can you have need surveyor

[@stableton2580]

surveyor here, would love to see this in mm accuracy as im from australia and these numbers mean absolutely nothing to me

[@RamiTamimi]

Corrections at the end of the video are in CM.

[@fjm4440]

Great content, as always. Most curious on the specs and brand of laptop you’re using. Thank you!

[@AbyssalPlain]

Not sure why you used the point cloud vs. an interpolated mesh to derive the heights of the points in PIX4D...?

[@jimmiekenyon6957]

Very sweet, thanks for sharing.

[@luismmatas]

Excellent 👍👍 thank you for this video!!

[@rumhave9632]

That thing is amazing.

[@RamiTamimi]

Yes it is!

[@andrewgibson4807]

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.

[@mdolan900]

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.

[@robotmind792]

Amazing

[@jac6350]

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. 😎

[@sandraofnick]

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.

[@felipiverza8879]

About the Dx, Dy, Dz, that 0.130 difference is 1.3 centimeters?

[@FreeStyleSloth]

For the price tag ($5000 USD+), would it not be cheaper to just buy a drone w/ RTK, a todal station, and camera?

[@trollenz]

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.

[@RamiTamimi]

It's just another tool in the tool kit.

[@anwaralattar1]

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]

I've enjoyed using it. Their accuracy has been constant with other big brand GNSS receivers.

[@ingedgarv]

@@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?

[@rolandkarlsson7072]

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?

[@danielgoosen2518]

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

[@niyazituluk1645]

kzbin.info/www/bejne/gZTLZouPd5alfsk

[@blain5827]

Yes I’d like to see more on volumetric measurements

[@ivancomrade_]

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.

[@GooGoosDad]

Will the NTRIP work for measurements in some rural areas in Bangladesh? Thanks.

[@Pedromelao]

MUY BUENA EXPLICACION

[@azm1azm1azm1]

Does the RTK unit on the Mavic 3 Enterprise make a difference with out a base station?

[@arliewinters2776]

The useable distance is like 16 feet...is this correct? I wonder if any plans to extend the working distance ?

[@ryansweeney7992]

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.

[@earthcitizen57]

Excelent video. Thanks

[@kasc918]

super useful, are you able to share the data set?

[@christwodata1579]

Thank you for the video. Is it possible to use the RTK in a remote area where there is not internet?

[@Earthislife1031]

Is there a stand alone app that I can use on android to measure earth curvature?

[@Diego.ccdm1]

What features does your laptop have for modeling?.. Greetings from Peru

[@RamiTamimi]

Pix4D Cloud is a web based solution, any computer with internet access can use it.

[@bradleycox9953]

awesome

[@franklynmerinochevez6569]

WHAT CERTIFICATION WILL BE NEED FOR USE IT IN LATIN AMERICAN COUNTRIES? Pix4D viDoc RTK SAYS ITS NO AFORDABLE FOR NOW

[@B1g_Salad]

How do I connect to a CORS network in CO? I couldn’t find any information on this

[@HamidKhan-dz6mn]

Hello sir how are you I am Hameed Hun from Pakistan sir what is the price RTK device

[@wodifpv644]

Will this system work with the Samsung phones that still have the lidar?

[@traeschell6042]

Curious as what you would recommend using this for?

[@diegoarmandoyasnotriana8322]

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

[@chadisrad2011]

Is there any way to compare these 2 results with just the iPhone alone?

[@RamiTamimi]

We could, obviously the viDoc would be more accurate, that's why I compared it to a Total Station instead.

[@chadisrad2011]

@@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?

[@aboynamedhsu]

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?

[@ryansweeney7992]

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.

[@richardoakley8800]

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

[@abdallah.alammar]

How did you record the screen of his data collector? any one knows tell us

[@armorer1984]

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.

[@onurhanbozkr337]

Lidar sensor very very good :))) good by GPS :)))

[@BUBBACHUKA]

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?

[@AllAboutDrones]

Can I use in Android Samsang S22 pro it has a lidar camera they say

[@EVM1978]

Does this integrate with topcon's RTK network?

[@PISQUEFrancis]

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?

[@RamiTamimi]

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.

[@wodifpv644]

Would this work attached to a drone

[@arquitexplico3890]

Woooow

[@dior1992]

Please try iphone RTK with gimbal 😅

[@RamiTamimi]

Might need a stronger gimbal to handle the weigh

[@Elfin4]

Could the Lidar be used internally to map concrete soffits to determine deflections of concrete roofs? Would be good to see this in metric mm

[@RamiTamimi]

Yes you should be able to do that

[@Elfin4]

@@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

[@jr3474]

Can you connect it to a base and rover, in case your locatuon does not have access to CORS network? Thanks for your videos

[@ryansweeney7992]

You can if your base can output an NTRIP network.

[@justinwing8689]

@@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?

[@enriquepacheco-vt6sl]

It is better than a Phamtom 4 RTK??

[@RamiTamimi]

Phantom 4 is a drone, this is a hand held system. They're apples and oranges to compare.

[@fsn8615]

should do with a check point, take a random point and measure on the iphone and then with the station or GNSS, that is, do the opposite.

[@RamiTamimi]

All of these points were check points, I did not georeference them for adjustment.

[@kapacbification]

Интересно конечно, но в лесу и в местах где нет мобильной связи как оно себя поведёт ?

[@zaidghaben4943]

Rami can you get Zakzok on a video?

[@amirliaqatabbasi4000]

Please tell me RTK intena price

[@bryanhill1406]

Maybe buy a bipod, if you want to measure accurately.

[@McCezex]

What’s the cost, where to buy it?!

[@pix4d]

Where are you based?

[@aniruddhadas1232]

Can this vidoc be connected to any DGPS base station ?

[@RamiTamimi]

Yes!

[@reveszpeter2325]

Hello Rami, What if you lose gps signal while measuring?

[@RamiTamimi]

If you lose RTK lock, then your data will not receive corrections. At this point I would say you need to depend on GCPs to correct your data.

[@justinwing8689]

@@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?

[@AndreaFiorini1974]

Nice. How much is it? There is no price on the website!

[@trollenz]

USD 6000

[@trollenz]

iPhone not included

[@AndreaFiorini1974]

@@trollenz 5.460,00 euro????? :))))

[@trollenz]

@@AndreaFiorini1974 Usually when the price is around "consult us" euros, it smells pretty bad already 🤣🤣

[@trollenz]

For iPhone 12 pro : 5388 € For iPhone 12 Max : 6588 € For iPad Pro 11" 2020 : 6588 € VAT included

[@ArjayMartin]

do surveyors get brain cancer more than average with the GPS stuff all day?

[@BradimusMaximus78]

Sounds like hocus pocus to me

[@diegohurtado9854]

Spanish subtitles please

[@davidkierzkowski]

Look like the largest elevation change In the entire state of Ohio

[@alwaystravelling100]

VI-DOC. There is no A in the name!!! Annoying that you misname the product!!

[@McCezex]

“Contact us”? Is it a joke?

[@Bantammenace1903]

It's refreshing not to see Leica or Trimble equipment being used. Keep up the good work.

[@nicholashpitts]

Earth is flat

[@mohammad.ghazawneh]

Great work, how can i contact you Mr. Rami

[@Irwansyah86]

Amazing