Total Station vs. GNSS Receiver: Which is the Better Surveying Tool?
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- čas přidán 18. 06. 2024
- Learn more about the Leica GS18 I: hxgn.biz/gs18icontact
Learn more about the Leica TS16 Total Station : leica-geosystems.com/en-us/pr...
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Chapters:
0:00 Intro
0:37 Total Station
3:41 GNSS Receiver
6:22 Disadvantages of Total Stations
7:32 Disadvantages of GNSS Receivers
8:39 Time Efficiency
10:03 Surveying with the GS18I
13:20 Accuracy Assessment
About Rami Tamimi:
As a Doctor of Philosophy student in Geodetic Engineering at The Ohio State University, my research focuses on the integration of traditional field surveying and civil design with advanced geospatial technologies such as LiDAR and photogrammetry. With over a decade of experience in the land development industry, I am continually seeking opportunities to enhance my education and professional skills in order to sustain a successful career in this field.
#Surveying #TotalStation #GNSS - Věda a technologie
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Salute for your hard work to teach the beginners like me who is pursuing career in surveying. Thank you very much
Great video Rami, I did a masters in civil engineering during COVID but unfortunately due to remote teaching the Geomatics module was not available (the only module I was really interested in) I genuinely believe your channel has taught me more than that course module ever would have. So thank you.
GNSS is so much more time efficient, and keeping in mind that you're doing RTK only, It would be interesting to see a PPK with about 5 minutes of readings per point and compare that with a total station.
Great video as always, I'm about to perform my first surveys next week using a GNSS reciever, and your videos have been a great first insight on how to hopefully make everything work out, keep up the good content!
Nice one Rami...some colleagues and I were just "discussing " this topic.
Nice video Rami! Please, make a video on how to work with Total Station and GNSS measurements in the same project: how to convert grid distances to ground distances: finding an avarage combined scale factor for the entire site, using GNSS calibration, etc.? Which method would you use to start a surveying with GNSS and then use a total station on the same job? What are the best practices for site calibration for rounded areas and linear projects and how do you survey out of this calibration? If you could make a video about this subject would be awesome!
7:30 You metioned that total station takes distances in Grid system, but wouldn't be in Ground? GNSS makes the measurements in Grid (ellipsoid - 3D surface) distances and you need to convert to ground (2D plane - flattened earth) no? Plus, in the end of video, comparing the total station to GNSS distances you wouldn't get the same coordinates and distances to points unless you apply a combined scale factor to total station to reduce or amplify the distances, deppending of the place you're located in UTM grid. So for small places and not so high altitudes, you would observe some few cm of difference no? Thanks!
Great video. I might have missed it, but I didn’t see where you mentioned the need for a mobile phone connection when using a CORS system. Can be a problem in some remote areas.
Great Video thanks Rami
Great Video! Thanks!
Nice thank you for the explanation good the steps ❤
GS18i, yes! I have had one for about two years, use the tilt and the camera both when needed. Just surveyed GCP for a manned flight, hitting vertical control within about a cm, about same horizo
ntal on existing NGS points in the area. For ANY GNSS, always have a redundant (repeat) measurements on your control. I have picked photo ID points that agree with static at about the 3cm level, pretty amazing for just walking by collecting a series of photos and that is with a RTN, not local base.
GNSS are horribly unreliable around buildings even when they tell you they have good accuracy. It is often not the case.
Hey Rami, thanks for the great video. How did the 3D coords of the FF elevation at your back door compare between the total station and the GNSS receiver? Was the elevation accurate? Thanks again! Amazing technology!
Well done video 👍
Hello Rami, I would like to congratulate you with all the awesome videos you are producing with these great devices to further the science on these surveying devices... I have question, is there any ways you can produce a video on why a total station will show a higher center point when standing for example by the beach and pointing at the horizon it will mark a location that is higher than the horizon? Is there a way you can explain the science behind this regarding your total station.
That camera feature on the GNSS receiver is pretty cool. Considering using equipment like this is more of a hobby I'll stick with my Emlid, though. Might not be able to afford Leica but I can still look at it fondly.
Yeah man, Leica is next level innovation.
Hi, congrats excellent tutorial! Do you know what are the external radios compatible to Emlid Reach RS2?
Looking good Rami, miss ya brother
Thank you sir
Rami, where can i get a tablet holder for my rover pole like the one you're using in the video?
You want to rethink your comment on the total station being "grid" distances? GNSS operates on coordinate systems that convert lat/long to grid. The only way to compute ground distances from GNSS data is to compute the horizontal and vertical combined scale factor. Since the total station is set up on the earth, every distance it takes is a ground distance.
The newer Topcon data collectors will transform coordinates between grid and ground but I’m not sure I trust transforming coordinates in the field so I just leave that off. I’ve seen too many ppl get burned transforming coordinates back and forth.
I wish Leica would sponsor me too 😅
How do you get the ridge heights with the GS18???
I have a question for ya. When setting up on Known C.P.s with a robo, do u still set your circle to Zero with Toocon total stations? Your back sight will check in nicely either way but are the shots accurate? Anybody?
Hey Rami, could you make a video about how GIS and land surveying are relatable? I've completed my undergraduate in surveying and am doing a masters in GIS. I would love to see people working as geomaticians, combining both of these fields for the spatial sciences.
am in the same field
As someone who studied GIS but who now works in surveying I would also be super interested in this.
@@moffia100 you can always combine the two...survey and GIS is someway somehow related and its an advantage having the two
Hey boss I need advice to buy a gnss to working with in Africa please
Great video! I bet if you would have used a base station instead of VRS, your vertical accuracy for the GPS would have been around .05', instead of .1'.
It would be the same as along as you have a good cell connection
I could (and will) add... Those sexy Leica receivers really are the best on the market. If you have deep pockets, go for it! But if you're new to the business and on a tight budget, the Emlid receivers are shockingly reliable and accurate. I can't tell that our Topcon HiPer VRs are ANY more accurate than our Emlid gear. Really. No lie. Get a pair of Emlid RX2+s so you can set up a local base, and pair that with Carlson Layout on an Android tablet. That makes for a very powerful and super economical setup. Highly recommended.
what about bringing GPS data into local coord system or vice versa
Can someone help with my problem please i created a c3d codelist descrpition keys now ii must transfer it to my leica captivate ts10 total station can someone tell me how thanks
Which one enables the state and corporations to collect more surveillance information about the user?
waiting for review of all RTK receivers
Total Stations measures Ground distances at 1 scale factor. It is GNSS that measures grid distances, like utm. Actually, when you try to match the distance in softwares like Field Genius, it increases de SF to match Total Stations distances.
Not quite. Yes, in UTM, GNSS also measures in Grid because it is utilizing the ellipsoid height, but when accounting for the geoid adjustment to get to orthometric height, now you have a ground measurement. The misconception that Total Stations measure ground distance comes from the idea that we take the measurements on the ground. Which is true, but in practice ground distances account for the curvature of the earth, which a total station does not. I think an entire video about grid to ground would be very helpful for everyone.
@@RamiTamimi I understand perfectly combined factor scale , based on projection and elevation. But I pretty sure total stations returns ground and gnss grid.
Total stations, chains etc are on the ground , they return ground distances even though they not consider the curvature of earth that only affects in a very large area of studio, that's another topic. In order to return grid distances they should be placed below earth. Or have a factor scale to reduce the distance , in utm it depends in which parts you of the zone you are and also the elevation. Trust me , I have read a lott7 can prove by urself in global mapper or similar gis
@@RamiTamimi it really doesn't even matter if your projection is above or below earth surface or at least the proposed model to study it. Total stations are on the ground and there fore they measure ground distances even though they not consider curvature of earth that only affects in a very large area. I consider you a smart guy , and I know you gonna find it. Greetings
@@ingedgarv you should Google and the difference between grid and ground distance, if you understood this concept you'd see you're wrong
Hi. Out of curiosity, with the GNSS system, could you use more than one base station? Would that improve accuracy or convenience to set up two or more base stations?
I’m no professional but I think your answer would be no, however at the small company I work for, we sometimes set up one base station and two or three rovers on large projects. And the rod men all go off in different locations and collect shots!
@@scottbuck9348that’s a great way to get a lot of topo in little time.
While a total station is more accurate in measuring the GNSS is more accurate over a larger area. For instance, if you traverse your way around surveying a 20 acre property with a total station you can expect to see error from your traverse line when checking back into your starting point where the GNSS doesn’t have that problem. Also, if I need to locate a structure or around a structure I prefer the total station because I don’t have to worry about multipath and it’s convenient to locate buildings reflectorless with the total station.
What about when you are doing integrated mesurment meaning you do resection of the totalstation using GNSS receiver? Thats like 99% of how totalstations are used now, when we do not talk about construction jobs.
damn idk that survey is this futuristic in Malaysia we still use old way no tablet
How much is the instrument?
Why in the world would a fabric canopy block rtk or gnss? It is radio transparent.
what is the accuracy of GNSS hand held devices that look like a phone?
3-5 meters. This is what your phone gets as well.
Is there any equipment that would give us just ELEVATIONS? Something with around a foot or error. I'm a petroleum geologist and elevations are crucial to our mapping. Also, it needs to be inexpensive...lol. Thank you!
Try an auto bench level or an auto laser level.
Grid vs Ground Distance
How much is it?
Love my GNSS receivers for crash investigations, but ice on receivers can be another obstruction. Keep it clean.
Rtk lidar on a drone is the best
I’m using the Trimble t100 but this seems easier
The visible red laser light is used for reflectorless pointing only - it doesn't measure anything. The IR light used by the EDM is invisible to the human eye. Additionally it's a very bad habit to level and centre the tripod using the total station - better to use a tribrach first then switch. If you're on rocky/stoney ground the legs are going to jump when pressing down and shake the hell out of the instrument.
Hey rami. I'm an asphalt foreman
What would you recommend for low cost option for a rtk survey just so I can measure the job fast on site
I'm assuming I can Bluetooth a rtk receiver to my phone on a pole and use a free app to record the data?
I don't need total professional, just a time saver for site meassurement
Hello Rami , I am a freelancer I work on ortho, mapping, lidar and uav data too . I will be providing outputs like orthophoto,DEM ,DSM, colour point cloud,
CONTOURS and MAPPING.and data matching with gcp also.please contact if u need any DATA SET to be processed.
The more tech you re dealing with the more chance for problems. I err on the side of doing things more manually since I trust myself and enjoy the leg work of it.
Total station and didn't watch the video
I mean I personally wouldn’t use a total station to set GCPs for a drone flight since the drone’s accuracy is less than a total station ;)
@Rami Tamimi good video...keep them coming
@@RamiTamimiЗачем используешь опорные точки для дрона, если для него существует базовая станция?
Rami Tamimi I can't afford GNSS receiver base station.....can I use total station for RTK drone survey and GCPs??
leica ts16 its an awesome station! But not Leica GS18i(its to big an unconfortable to work all day in difficult terrain with this kind of big hardware!) Unfurtunately but China offer more good, light an afordable GNSS solutions than LEica
useless...
11:46 OMG! Did you drop that brand new $30k receiver on the ground? Look at it. That poor thing. You deserve 10 licks with a splintered lath! I would note from my experience that the real danger with GNSS is not so much the reduced accuracy when working as indicated. Sometimes the data collector is telling you it has an accuracy
id go for the total station any time accuracy is the aagenda......