I was awaiting the drone survey series eagerly. I am glad to know that drones costing less than 1000 dollar along with GNSS receiver (which I think can also be available at reasonable price) produce orthorectified orthomosaic with relative and absolute accuracy. Looking forward to image processing and more next. You explain really well.
Great video. We currently fly a DJI S-1000 for surveillance and security purposes. Your excellent videos have provided several very good ideas that significantly improved our data capture methods. Thank you and Good Luck always.
Thanks for the video I’m interested in learning about serving. Just a small thing though protocol is your power on the remote first so you always have positive control over the aircraft.
Great content, you explained it way better than my lecturer in the photogrammetry unit as part of my surveying degree. Looking forward to getting into this type of surveying as the firm I work for has done a few geotechnical assessments using LiDAR and photogrammetry.
A few tips for the presented film: 1. Mark your elements that they do for GCP (adding numbers on the lids will make you see the GCP number in the photos, at the same time naming the GCP will be easier) 2. As far as I know, giving GCP right in the middle does not seem to affect accuracy. Have you checked how it is in practice? 3. The drone flight path selected by you is not optimal in time. The flight path should be aligned with the longer sides of the flight. This will result in fewer turns of the drone and shorten the flight time (will allow you to fly a larger area) 4. You talk in the movie about setting the capture interval to 1 second. The interval should be selected according to the possibility of taking pictures by the drone's camera. Few cameras can take pictures with a speed of 1 second. I have a question: a) Have you used any Trimble DA2 solutions? It looks like a much cheaper solution when it comes to purchasing GNSS equipment and comes out cheaper for occasional use (prepaid method $ 100 for 10h of online use) b) will you continue this series? GREAT MOVIE. MAY THERE BE MORE OF THEM. Greetings from Europe
Yea typically I'll put a survey stake next to the point with some ribbon to see it from far away with larger sites. I typically put one GCP in the middle of the site. I get that the outside ones are enough for a interpolated calculation, but having one in the middle could help shorten the distance between the exterior GCPs. You are correct about the path I took not being the most efficient. But being only a few minutes and just a quick crash course on drone mapping, I figured I'd save the tip for another video. Manual time interval flights usually are 3-4 seconds typically. I haven't used any Trimble products. I have Sokkia and Emlid, and I found the Emlid has the same results as my Sokkia, so I tend to use it more since I like the interface. Yes of course, the series will continue, make sure you subscribe so you don't miss out!
A GCP in the center of your worksite is necessary if you are not using coordinated cameras and you are using Structure in motion (Computer detects points outside of your ground control) photogrammetry, especially on large sites. It helps to identify and correct an error called doming that can occur if your lens model is incorrect. Doming is when your model is domed or dished compared to reality (i.e. the center is higher or lower than it should be). Over large sites (1km x 1km) i have had 2m on a check mark in the rough centre. Took me ages to figure it out. Establishing a good camera & lens model is key to good photogrammetry: For non coordinated photos (i.e. the drone has autonomous GNSS) I have a minimum requirement of GCPs at the external corners of my survey, one GCP at the center, one GCP at the highest point i can, one at the lowest point i can. The high and low points are to help determine my focal length (you can skip these if you are not concerned about heights). For Coordinated photos (i.e. the drone has differential GNSS -PPK or RTK) I take photos at 30 degrees from Nadir(down) and with that I only need check points to confirm my coordinate transformation (since in Australia GDA2020 has a well defined transformation from IRTF and hence WGS84). this is because the software can accurately determine focal length by comparing photos taken if opposing directions and can adjust focal length to ensure they match. If i only need an ortho image then ill just use nadir photos since it makes very little difference horizontally. You can precalibrate your lens by doing flights over a good number of coordinated GCPs but i prefer to calibrate within each job and compare it back to my baseline. Just remember over time calibration drifts much like Total stations so you do need to calibrate at regular intervals (e.g. one year). Note: the phantom 4 RTK has been pre-calibrated by DJI and its calibration parameters stored in each photos EXIF data if you want (and you dont have an exif data editor) open the file in notepad (preferably notepad++) and do a text search for something like "Focal" which will take you to the EXIF data in the photo.
Great video, thank you. Looking forward to the Post Processing addition. Software comparison would be great as well. We would like to get a good software platform that would export DXF files for our construction projects. Much appreciated.
Great work Rami, I hope you will put video linkage with atmospheric parameters monitoring from these UAV( especially for radiations) and further processing the data. Great Job...😀
Hi Great video. Is it possible to use the DJI Phantom 4 with rtk functionality to carry out survey tasks? Likewise is it also possible to use DJI mini 3 Pro for surveying? Many Thanks
I notice you don’t mention a base station. Do you not have to use a base station? Very new to mapping and all I’ve seen is people using a base station and a rover to set the GCPs. Great video!
That was interesting! As a pilot, I thought you were going to say, the number one thing is "safety"! :-) The pre-planned route and the GPS control point marking was pretty cool. It might be good to let folks know that one needs to obtain a FAA issued Part 107 remote pilot certificate, register and mark each drone separately with the FAA, (and to get an airspace authorization if operating in controlled airspace) in order to use a drone to do aerial surveying in US Airspace, since aerial surveying is not recreation, and must be flown according to 14 CFR part 107. Very interesting video! Thanks Rami!
Oh yes, surveyor's should be the only ones to set control points, and Part 107 Pilots (been one since 2017) should be flying drones commercially. "Safety" is the number one priority when operating drones, good data when processing it ;)
You are a natural for explaining this stuff! So I have a question about Drones with RTK being used with a base station. If you don't have a known reference point to input in the base station and don't have access to a NTRIP server, when you are using a RTK base does it make a difference in the accuracy? Or do you have to have a known point or access to NTRIP? Thanks!
Great video! As a complete beginner, I am wondering how you were able to move around a single base station receiver to gather all the GCPs. I thought that 2 base stations are required to do that, one fixed and one as a mobile rover? Are you connecting to a local subscribed Network Connection Service to do this? I'd love to understand why a single base station receiver cannot be moved around to gather the data from the various GCPs without connection to a local Network Connection Service. Would you be able to comment, or maybe make a video to help us novices understand?
Thanks a lot for this video. Got a question for you... If a water survey drone only completes 11 out of the scheduled 24mins survey time and keeps disconnecting several times, 4 -5 times during its flight then aborts the mission before completing the entire flight as the battery was too low. It tried to return home but failed to successfully do so and ended up descending in the bushes far from Home - Does this mean that the survey data was successfully collected as we are being told? The drone used was exactly the same as the one in this video.
This is great Rami, thank you! I came into drone work from photography so getting the "pretty picture" part of it to be beautiful has been very important to me lol. After 2 years of practice flying photogrammetry missions and processing the data without gcps I'm ready to actually start doing "surveying" and marketing the work. Really hoping to team up with a local surveying company. I'm not a licensed surveyor so no matter how good my work is it cannot be called a survey unless I partner with a surveyor. I'm very excited about the possibility of producing accurate measurements and contour lines on my pretty pictures 🙂
This may sound like an odd question. But I would appreciate your thoughts regardless. I have a piece of property adjacent to mine. It's basically a rectangle. An open area of perhaps 15 acres. Someone put down ground control points in a straight line along the center of the property. Parallel to the longer sides of the rectangle. Is there any reason someone would do this in order to survey the property? My wife asked him what he was doing. He said surveying. I am more inclined to believe he's monitoring the property as we've had illegal hunting going on. A line in the middle would make way more sense. But maybe I'm missing something. Thanks and regards.
Great tutorial BUT... I don't understand. Did you take the GCP position by 1 GNSS receiver? So all we see in the video is the "rover" and the "base" is nearby? Or one can just use a single gnss receiver to get gps info on the gcp?? Very confused on this.... here in the video it seems like you have only 1 gnss ?
I have all 4 corner survey points on a 12 acre lot but i want to mark the lot lines. Can a drone be used to fly from one pin to another whilst i walk under it so i can flag the edge lines? I have a recreational gps drone b5w drone. There are trees but not 400 feet up.
Hi Rami, I have just purchased a DJI Mavic 3 enterprise and have no idea about mapping, but I am trying to learn. Is it possible for you to send me a sequence of the entire events with the Mavic 3E so I can get the sequence correct, or just send me a list of videos you have so I can try to make a workflow that works, especially how you obtain RTK on the 3E? Thanks a lot.
Do you have or can you make a video with a drone under $ 1000 dollars that is no DJI and use Open software and apps for planning flights and do the orthomosaics?
Fine!! It would be interesting to see a guide to camera settings. And the dependence of drone speed and shutter speed on P4RTK. Greetings from Russia(=
Hi Rami I'm new to surveying, your videos helped me a lot. Do you need a certificate to fly drone, if so what is the best way to have one? Greetings from Jordan
Best Geomatic videos on the TH-cams. Thank you so much
I am very happy and fortunate because I discovered your channel.
Thanks!
I was awaiting the drone survey series eagerly. I am glad to know that drones costing less than 1000 dollar along with GNSS receiver (which I think can also be available at reasonable price) produce orthorectified orthomosaic with relative and absolute accuracy. Looking forward to image processing and more next. You explain really well.
As a 1st yr surveying student in ireland this is quiet interesting
Glad you liked it. Best of luck in school!
As a senior graduating this school year in geomatics, this is amazing. Best Geomatic videos on TH-cam.
@@jcpad1797 yeah definitely
The power of TH-cams
Thank you.
just ordered my phantom 4 pro.. thank you for this video, very informative :)
Great video.
We currently fly a DJI S-1000 for surveillance and security purposes. Your excellent videos have provided several very good ideas that significantly improved our data capture methods. Thank you and Good Luck always.
Thanks for the video I’m interested in learning about serving. Just a small thing though protocol is your power on the remote first so you always have positive control over the aircraft.
Great content, you explained it way better than my lecturer in the photogrammetry unit as part of my surveying degree. Looking forward to getting into this type of surveying as the firm I work for has done a few geotechnical assessments using LiDAR and photogrammetry.
Waiting for part 2! Big Up man
Thanks, coming soon!
Great video, Rami! Keep them up.
I was looking for this video only.. great job bro.
Interested to see the next step.
Happy that you’re using our French expression "cul de sac" to describe the location. 🙂
Great video+explanation+presentation! Thank you for sharing! Well done mate - NEW SUB 🙏🏻
A few tips for the presented film:
1. Mark your elements that they do for GCP (adding numbers on the lids will make you see the GCP number in the photos, at the same time naming the GCP will be easier)
2. As far as I know, giving GCP right in the middle does not seem to affect accuracy. Have you checked how it is in practice?
3. The drone flight path selected by you is not optimal in time. The flight path should be aligned with the longer sides of the flight. This will result in fewer turns of the drone and shorten the flight time (will allow you to fly a larger area)
4. You talk in the movie about setting the capture interval to 1 second. The interval should be selected according to the possibility of taking pictures by the drone's camera. Few cameras can take pictures with a speed of 1 second.
I have a question:
a) Have you used any Trimble DA2 solutions? It looks like a much cheaper solution when it comes to purchasing GNSS equipment and comes out cheaper for occasional use (prepaid method $ 100 for 10h of online use)
b) will you continue this series?
GREAT MOVIE. MAY THERE BE MORE OF THEM.
Greetings from Europe
Yea typically I'll put a survey stake next to the point with some ribbon to see it from far away with larger sites. I typically put one GCP in the middle of the site. I get that the outside ones are enough for a interpolated calculation, but having one in the middle could help shorten the distance between the exterior GCPs. You are correct about the path I took not being the most efficient. But being only a few minutes and just a quick crash course on drone mapping, I figured I'd save the tip for another video. Manual time interval flights usually are 3-4 seconds typically.
I haven't used any Trimble products. I have Sokkia and Emlid, and I found the Emlid has the same results as my Sokkia, so I tend to use it more since I like the interface.
Yes of course, the series will continue, make sure you subscribe so you don't miss out!
A GCP in the center of your worksite is necessary if you are not using coordinated cameras and you are using Structure in motion (Computer detects points outside of your ground control) photogrammetry, especially on large sites. It helps to identify and correct an error called doming that can occur if your lens model is incorrect. Doming is when your model is domed or dished compared to reality (i.e. the center is higher or lower than it should be). Over large sites (1km x 1km) i have had 2m on a check mark in the rough centre. Took me ages to figure it out.
Establishing a good camera & lens model is key to good photogrammetry:
For non coordinated photos (i.e. the drone has autonomous GNSS) I have a minimum requirement of GCPs at the external corners of my survey, one GCP at the center, one GCP at the highest point i can, one at the lowest point i can. The high and low points are to help determine my focal length (you can skip these if you are not concerned about heights).
For Coordinated photos (i.e. the drone has differential GNSS -PPK or RTK) I take photos at 30 degrees from Nadir(down) and with that I only need check points to confirm my coordinate transformation (since in Australia GDA2020 has a well defined transformation from IRTF and hence WGS84). this is because the software can accurately determine focal length by comparing photos taken if opposing directions and can adjust focal length to ensure they match. If i only need an ortho image then ill just use nadir photos since it makes very little difference horizontally.
You can precalibrate your lens by doing flights over a good number of coordinated GCPs but i prefer to calibrate within each job and compare it back to my baseline. Just remember over time calibration drifts much like Total stations so you do need to calibrate at regular intervals (e.g. one year).
Note: the phantom 4 RTK has been pre-calibrated by DJI and its calibration parameters stored in each photos EXIF data if you want (and you dont have an exif data editor) open the file in notepad (preferably notepad++) and do a text search for something like "Focal" which will take you to the EXIF data in the photo.
Great video, thank you. Looking forward to the Post Processing addition. Software comparison would be great as well. We would like to get a good software platform that would export DXF files for our construction projects. Much appreciated.
Thanks for your efforts for all us
Great content sir, quite informative
I’m a Surveyor from Nigeria
Great information provided thank you
Thanks for sharing it. Enjoyed it. ^^ Take care & seeU. ^^ 늘 행복하세요. ^^
My pleasure
looking forward to the next video!
Thanks, Cinderella!
Your videos are the best!! I've been doing research on the P4R and glad to see it from this angle as well as all the info with it👍
Im interested to see what to do next with the checkpoints. Also, do you need the gcp’s with the RTK phantom?
Hi Rami. Thank you for this excellent video. I am not sure why you need ground control points if you are not going to adjust the data...
wait I am confused, when will we use the coordinates of GCP we took? you have not used them when you planned the mission. can you explain please?
Very informative video, as always. Thank you!
Great video. Thanks for sharing.
Looking forward to more vids! Hope you cover the Legalities of drone surveying, particularly in residential areas 🤔🤔
Oh there is so much more coming soon! Stay tuned!
عاااااش يا هندسة ,,,محتوى رائع ومتعوب عليه ,,, أنت من فلسطين او الأردن ؟؟ , انا ضفاوي من الخليل اجمل تحية إلك
Very interesting topic. Thank you
Thanks for these amazing videos Rami, could you please also make videos about E-survey!?
thanks, that was a good presentation
nice presentation, thank you...
Very informative and interesting indeed!
Glad you found it helpful
Wow
What an explanation
Great work Rami, I hope you will put video linkage with atmospheric parameters monitoring from these UAV( especially for radiations) and further processing the data. Great Job...😀
Hi
Great video. Is it possible to use the DJI Phantom 4 with rtk functionality to carry out survey tasks?
Likewise is it also possible to use DJI mini 3 Pro for surveying?
Many Thanks
Man our company just got a drone which I’ll be in charge of …very helpful thanks
Good Luck
Iam using aphonixapp ,Tube and Facebook
good job im surveyor i whaching your video 👍👍
So interesting!
Hi, Thanks for the video. could you please say How accurate is this method?
What accuracies can you expect when adopting this technique?
Hey! Great videos. Just wondering what app you use for LiDAR on your phone?
احسنت رامي عمل جيد
great video sir. Can we take stereoscopic picture and do aerial triangulation in erdas imagine? and then use it in ArcGIS to get stereo view? Please
This is very helpful
very good work
great work 👍
Thank you man❤
awesome vid again man!
Thank you!
What is the difference between the GCP and the CHK point? it appears that you're doing the same thing for both types?
I notice you don’t mention a base station. Do you not have to use a base station? Very new to mapping and all I’ve seen is people using a base station and a rover to set the GCPs. Great video!
Thank you Godbless
Hi Rami, I'm curious was the RTK active on the drone during this flight as it said dnss on takeoff and not RTK. Thanks
Does that drone measure an undulating land scape and give accurate figures ?
Which ones are the drones under $1000 thousand dollars that make the same job, And which apps they use to do the programming flight for mapping.
Thanks so much
Which DJI app you use for drone operation for mapping?
Waiting for the nexts.
Interesting content Rami👍👑
Thank you Ahmed
That was interesting! As a pilot, I thought you were going to say, the number one thing is "safety"! :-) The pre-planned route and the GPS control point marking was pretty cool. It might be good to let folks know that one needs to obtain a FAA issued Part 107 remote pilot certificate, register and mark each drone separately with the FAA, (and to get an airspace authorization if operating in controlled airspace) in order to use a drone to do aerial surveying in US Airspace, since aerial surveying is not recreation, and must be flown according to 14 CFR part 107. Very interesting video! Thanks Rami!
Oh yes, surveyor's should be the only ones to set control points, and Part 107 Pilots (been one since 2017) should be flying drones commercially. "Safety" is the number one priority when operating drones, good data when processing it ;)
Great video!, it was the one i was looking for! did you use just one emlid rs2? or the base was not shown on the video?
Thank you
You are a natural for explaining this stuff!
So I have a question about Drones with RTK being used with a base station. If you don't have a known reference point to input in the base station and don't have access to a NTRIP server, when you are using a RTK base does it make a difference in the accuracy? Or do you have to have a known point or access to NTRIP? Thanks!
What are the function of the controls created earlier?
What app are you using to input the GCPs and CHKs?
sir great video sir please for beginers basic cordinate system
Rami I love those checkpoints where can I buy those?
What app you using to set the GCPs
Great video! As a complete beginner, I am wondering how you were able to move around a single base station receiver to gather all the GCPs. I thought that 2 base stations are required to do that, one fixed and one as a mobile rover? Are you connecting to a local subscribed Network Connection Service to do this? I'd love to understand why a single base station receiver cannot be moved around to gather the data from the various GCPs without connection to a local Network Connection Service. Would you be able to comment, or maybe make a video to help us novices understand?
Thanks a lot for this video. Got a question for you... If a water survey drone only completes 11 out of the scheduled 24mins survey time and keeps disconnecting several times, 4 -5 times during its flight then aborts the mission before completing the entire flight as the battery was too low. It tried to return home but failed to successfully do so and ended up descending in the bushes far from Home - Does this mean that the survey data was successfully collected as we are being told? The drone used was exactly the same as the one in this video.
This is great Rami, thank you!
I came into drone work from photography so getting the "pretty picture" part of it to be beautiful has been very important to me lol.
After 2 years of practice flying photogrammetry missions and processing the data without gcps I'm ready to actually start doing "surveying" and marketing the work. Really hoping to team up with a local surveying company. I'm not a licensed surveyor so no matter how good my work is it cannot be called a survey unless I partner with a surveyor.
I'm very excited about the possibility of producing accurate measurements and contour lines on my pretty pictures 🙂
How did you get a FIX with just a rover? Are you on an NTRIP network?
Whether the Mavic Pro v2 plus will assist in the remote control mapping?
So your GNSS RTK was using what as the base? A CORS station? Or was it just averaging GNSS solutions?
This video is a demonstration of a standard single position GNSS position without RTK corrections.
nice ,thanks man
Of course, my pleasure
Great video! I'd love to get into the profession but college level education is out of the budget and putting myself in debt seems like a bad idea.
Apprentices needed in California.
@@pbchief2 Oh? How much do they pay?
HI Dji Mavic Pro can execute drone survey ?
What program he uses for conect the cellphone with GPS Receiver?
Thx
wonderful
Is it possible to use DJI AIR3 for this same work?
This may sound like an odd question. But I would appreciate your thoughts regardless. I have a piece of property adjacent to mine. It's basically a rectangle. An open area of perhaps 15 acres. Someone put down ground control points in a straight line along the center of the property. Parallel to the longer sides of the rectangle. Is there any reason someone would do this in order to survey the property? My wife asked him what he was doing. He said surveying. I am more inclined to believe he's monitoring the property as we've had illegal hunting going on. A line in the middle would make way more sense. But maybe I'm missing something. Thanks and regards.
You are great 👍👍
Thank you habibi Ammar
what app are you using ?
Great tutorial BUT... I don't understand. Did you take the GCP position by 1 GNSS receiver? So all we see in the video is the "rover" and the "base" is nearby? Or one can just use a single gnss receiver to get gps info on the gcp??
Very confused on this.... here in the video it seems like you have only 1 gnss ?
I have all 4 corner survey points on a 12 acre lot but i want to mark the lot lines. Can a drone be used to fly from one pin to another whilst i walk under it so i can flag the edge lines? I have a recreational gps drone b5w drone. There are trees but not 400 feet up.
Great Video!! What capture app do you use?
Hi Rami, I have just purchased a DJI Mavic 3 enterprise and have no idea about mapping, but I am trying to learn. Is it possible for you to send me a sequence of the entire events with the Mavic 3E so I can get the sequence correct, or just send me a list of videos you have so I can try to make a workflow that works, especially how you obtain RTK on the 3E? Thanks a lot.
Do you have or can you make a video with a drone under $ 1000 dollars that is no DJI and use Open software and apps for planning flights and do the orthomosaics?
Here in Romania my town wasn't updated the aerial imagery since 15 october 2012! :(
Google Maps is sleeping...
Fine!!
It would be interesting to see a guide to camera settings. And the dependence of drone speed and shutter speed on P4RTK.
Greetings from Russia(=
brother you must put more option of payment methods in your survey shirt website such as VISA I could not buy items from Saudi Arabia!
Hi Rami
I'm new to surveying, your videos helped me a lot.
Do you need a certificate to fly drone, if so what is the best way to have one?
Greetings from Jordan
Yes, in the United States we have the FAA Part 107 sUAS Pilot's License.
Do u have a License? I’ve been surveying for 5 years and I wanna buy a drone and get Into this.
Owsome
Great
Hi, can anyone guide me, if i can record video while surveying simultaneously, using Drone Deploy or other software?
Great stuff, how much is your GNSS receiver?
about $2200
@@RamiTamimi not bad at all. What's the brand and model?
Rami.interesting 😯
Thank you!
I've heard the background music before. I'm pretty sure donut operator uses it too. Kinda wild lol