An Overview of Aerial Mapping with Pixhawk, Pix4D, and GoPro Hero3+
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- Опубликовано: 14 окт 2014
- As I got further into producing this video I realized just how much information there is related to producing your own aerial maps. I touch on this from a high-level, but plan on doing a more in-depth series of videos soon.
Here are the aerial maps from the video that I'll be updating with new layers as I produce them from my UAV:
bit.ly/1w9DumJ
Here are the GoPro photos, telemetry log, and Pix4D output from my flight that day:
bit.ly/1F0lb9I
GoPro Hero 3+:
amzn.to/1fLgQKU
Be sure to check out Pix4D:
bit.ly/1wL9HRi
Here's a link to QGIS:
bit.ly/1sKJsLz
and finally here's a link to gdal2tiles that I use to create the map tiles to be overlaid on Google Maps:
bit.ly/1rdjzPz
I hope this is useful information. Please feel free to post any questions or comments below.
Thanks for watching!
Dennis, I want to take the time to thank you for all of the information that you have shared over the years. I would not be where I am in this hobby if it were not for your online help. You are the MAN! keep up the good work and just know you are greatly appreciated form the community.
The only great video about uav mapping on the RUclips. Thank you!
P.S. I am FPV hobbyist and will be moving into Austin soon :)
Thank you for your contributions to the community Dennis. I wouldn't be where I am without your videos. I am really looking forward to your aerial mapping how to videos.
***** Thanks for such awesome feedback. I'm very glad to hear these videos are useful. I'll continue to share all this info as I learn it. Take care.
Thanks Dennis.
Look forward to seeing the Pix4D how to,just downloaded it yesterday and I`m just starting to do some reading today. Nice to see it in action.
Philip Gordon Cool. In case you didn't see there is a free, limited version called Discovery. Be sure to check it out.
As usual I am very impressed with the amount of information you provide and the ease in which you are able to convey the information to people like myself. I for one am going to follow the work you do with aerial mapping as this is also a personal interest of mine.
Thank you for all of the time and effort you put into your videos and thank you for sharing so freely!
If there is anything I can ever do for you, don't hesitate to ask!
Darryl
Darryl Kushneryk Thanks so much for the kind words and I definitely plan on sharing everything I learn about this application of UAVs. Take care.
Finally someone to explain it easy. Thank you!
Subbed.
Excellent and very educational video.
You're also very pleasant to listen to.
Keep up the great work, and thanks for sharing.
Outstanding work.
When I first got into arial photography, mapping was what I was really interested in. The complexity and time involvement was off putting to me with the kids and job. I stayed on the fpv side of things and migrated into long range as well as mini wing racing (mini quads are cool but mini wings are a blast!) but you have absolutely re sparked my interest in trying this again. Perhaps the downward facing port on my Penguin with my hero3+ B.E. Would be a nice start. Did you not have your hero mounted on your gimbal when you were mapping with that? And once again thank you for all you do Dennis you are an inspiration!!
eric deherrera I know what you mean. I can't the number of hours I've spent messing around with aerial mapping. There are so many components that I don't think people realize everything involved. I've never flown a mini-wing, the smallest I have is a 32" TuffWing but it's super fun to fly. Yeah I totally think you should experiment with the GP3+ in your Penguin. I used to fly with my Canon in the Penguin and got pretty good results. I've found that the delta wing has worked better for me with APM and Pixhawk. When I mounted the GP3+ in the wing I did not use a gimbal. Pix4D does a great job of fixing any projection issues. Pretty amazing software, but lots of trial and error. I appreciate the kind words. Just trying to share everything I learn about this amazing field. Take care.
This is awesome. I'm starting to practice more with my platform to do mapping and really needed the info that a GoPro CAN be used with Pix4d to do mapping. I'm going to now dig through your videos to see if you show how to do that in more detail! :)
+PRMImagery Glad to hear this helped. Good luck with your mapping projects.
Great overview, thanks! I've been looking for some straight forward info on this topic. I really look forward to your in-depth video series. :)
RPV Addiction Glad to hear it. It's an area I'm very excited about. I'll definitely keep you posted on the progress. Take care.
Thank you for sharing, again! One thing I noticed with a wide angle lens (like the GoPro) vs a Point and Shoot camera lens (ie SX260) in regards to creating 3D models is that the Gopro is able to get the side and underneath "over hangs" more. I also noticed that the GoPro seems to capture more details, especially things like power lines. I didn't realize Pix4D had a free version until visiting the site from your video.
wickedbuddha Good tip on the GoPro. I didn't realize this but will definitely give it a test. Yes, Pix4D Discovery is the free version but very limited in outputs.....unfortunately! Thanks for sharing your thoughts.
Awesome Dennis :)
I am so impressed by all these tools! Possibilities are just incredible!
Thanks for sharing and as usual i will stay tune for the next videos ;)
Have a great day
ANOTHER BLACKMENNEWSTYLE PRODUCTION Thank you. Yes the possibilities are pretty amazing. I'll definitely be sharing more information in the near future. Take care.
Hi Dennis, Thx. I have the same SX260 (with CHDK for time-lapse) and your Gopro 3+. Will appriciate photos of how did you attach it to wing, and also the Gopro with the cutout.
David Behr Here is a photo of how I have it mounted in the wing.
www.dropbox.com/s/xk7vo6oryq3k33l/2014-11-04%2011.34.59.jpg?dl=0
I had to 3D print that light blue plate because previously I made a huge cutout for my downward facing gimbal (still trying to work that out). If I hadn't been messing with the gimbal I would have just done a circular cutout to put the lens through. I used kyosho zeal to reduce any vibration as well as raise the camera up since the lens extends out a good bit. Hope that helps.
Absolutely awesome. Thanks!
Thanks a lot for sharing.
Have you considered using ground control points that would help you better calibrate the geo coordinates?
Geo referencing those ground points with a survey grade gps receiver would increase the overall project's output accuracy.
Tartalo33 Thanks for the suggestion. I've totally thought about that but don't have a good receiver to do this with. I have put GCPs down just to see how they look in my imagery, but have not done any highly-accurate georeferencing. I hope to do some testing of that in the future. I have a friend that has a survey grade receiver.
I'm very interested in learning more about this!!!
flyboyMaxwell Great! You and me both :) I'll definitely be sharing more in the coming weeks. Thanks.
Hi Dennis. Thank you for your contribution to this industry. Your work has helped many of us. I was wondering whether you know of any good cameras around 20mp or more which can be used for mapping triggered by pixhawk which have auto geotagging. I look forward to chatting
Great vid. Look forward to the more indepth video
paulham Thank you. I plan on sharing more info soon.
Dennis, Thx. for the photo. Dave
David Behr You bet man. Hope it helped some.
Can you show me a step by step tutorial on how the setup of Gopro is done before and during flight and how to produce a map out of all the photos had been taken as well? Thanks.
Impressive and informative! Thanks!
Awesome video. I have been working with pix4d for some time. The capture appt is a good tool. I haven't used qgis and am looking forward to seeing more videos.
Anthony Sydor Thanks for the feedback and I appreciate you watching.
Great video Dennis , very interesting stuff . Hope you are well mate ? Scott
Scott Thompson It's great to hear from you man. I'm doing well, thanks for asking. I hope to share some more information on my progress soon. Take care and keep in touch.
Hi Dennis,
How did you made the camera shutter work ?
Was it an external servo or an internal setting for shutter speed?
Hi Dennis, Great video. Congratulations. You have enlightened and motivated many here. Can you please share the PID tuning file for the wing you are using with pix-hawk ? I guess you are using Buffalo wing .
Thanks and regards
SID
Siddharth Amin I'll do a video soon showing how I AutoTune and will share my PIDs. Right now it's currently undergoing some upgrades. Thanks for asking and stay tuned.
Another really great video. You have a gift of breaking very complicated functions into easy to follow outlines. Thank you! One question, do you think this would be feasible using a GoPro Hero 3 on a downward facing gimbal mounted on a quad-type vehicle? I have a functional airtime of about 13 minutes currently. I think it would be a useful tool, but I want to make sure it would work before I start spending all the time you have!
tpalshadow Thanks so much for the feedback! It should be feasible to remove the GoPro lens distortion with both Pix4D and PhotoScan Pro. I mentioned in my most recent video about PhotoScan that if you have imagery I'll be glad to process it for you. But it must be that the imagery will not be used for commercial purposes. Watch the video and if you're interested shoot me a Dropbox link to db at unmannedairlines dot com. Take care.
Hey Dennis! It would be really cool and helpful if you could make a video that shows how you set up the different components! Is there an online tutorial you used to figure out how to put all the components together?
Mathew Joseph You got it. I plan on doing a series soon with the Ranger EX FPV plane that shows how to do everything from setting up Pixhawk to getting it out in the field to do aerial mapping. I'm alway evaluating a wing to do this with. Will keep you posted and thanks for the comment.
Awesome stuff! I'm studying GIS in Uni now so I'm psyched to see your tutorials. I am Subscribed :) Thanks
Hello Dennis, Thank you for sharing this video.. I have question and suggestion about the Camera Triggering system..How did you setup the trigger system for the Gopro?? How about if we use Xiaomi Yi Lite action cam with 16MPix picture sensor? Xiaomi has a wireless remote Shutter... I really like to discuss this "cheap" mapping solution for school/training.. Can I email you? Tks
Hi Dennis,
Rather try and fly your mission with a cross wind, the processing accuracy is better because you end up with a "Wishbone" effect on your overlap.
Also give AGISOFT PHOTOSCAN a try, processing has a easy workflow and great accuracy (sub 68mm flying at 600m agl)
Walter Kojetin Thanks for the tip. I had never thought about this "wishbone" effect. Can you point me to any documentation about it? I've used Photoscan Standard as I can't afford Professional, but have had some could results with it. Maybe I can get them to sell me the educational edition :)
Wow, this is amazing! You have put so much time into this video and it has me excited to do this project for my friend!
2 questions;
1. Can I just fly my drone around the target area in a rough grid pattern with the GoPro taking photos every 5 seconds from take off?
2. Do you have to pay the massive fee to access pix4d or is there a more limited version you have used?
Cheers!
+ibsn87 1. It depends on your flight speed. Taking pictures every 5 seconds may not be fast enough unless you're flying a multirotor and it's going slow enough. If you're flying a fixed wing then you'll most likely need to take photos on a faster interval. You may find that GPS distance based triggering is better.
2. There are options like Photoscan, OpenDroneMap, and others I would recommend looking into. Also, check out www.mapsmadeeasy.com
Awesome Dennis. I also find this very interesting.
Aaron Serafinowicz Glad to hear it. I'll definitely be sharing more as I go. Appreciate the interest.
Did you make a video with the gopro and extract frames? Or how did you automate taking pictures with it?
I have a Apprentice I would like to set up for this, it has a lot of room to mount a camera under the plane or I my try it with my FPV Raptor. you did a great job on this.
Soldier53flyer I've only seen the Apprentice online so I'm not sure how it will do. But it's all about experimentation so feel free to give it a try and let us know how it goes!
Thank you Dennis, have a great one. I will give it a try.
Fantastic Dennis
I'm still looking into EOS systems for my 3D mapping and modelling (1/2 the price of px4d) project,
But doesn't support Gopro hero3. Thank you for sharing this project with us and am very interested
in your Px4d experience. It looks like it may be worth the money.
Keith Rolston I've never heard of EOS systems. Will definitely have to check them out. Pix4D recently announced a light version of their software called Discovery. It's nice, but VERY limited in outputs. BTW you can lease Pix4D Pro in 30 day increments so you don't have to pay for the entire package up front. Good luck and keep me posted on your progress.
EOS is based in Vancouver. I looked into that software for volumemetrics. Looks like they offer 3d mapping software as well. I didn't realize 3d robotics offers a rtf with the software included.... But how fun is that:)
nice job man. surely it needs a lot of knowledge to set and figure how this puzzle works but then u handled it well. God Bless
bobot021070 You're right it's always a puzzle :) Thanks for the feedback.
Hello,
I'm using pixhawk flight controller. The problem is with banking angle which was shown in the flight data screen. When I roll the flight controller to left, it's banking to right and vice versa. Can you help me out to solve this problem?pls help and i am u subscriber and follower in git hub. sir pls help me
hi man...i am looking to buy a cheap camera for this job...what do you suggest?
Very good videos Dennis... I'm planning to build my fisrt plane and don't know which autopiltot (clone) to choose: Pixhawk or APM. Wich is better in your opinion for mapping with canon cameras? My only experience is with Nazas and multis...Thanks from Argentina
Max P. I think you can't go wrong with either. I've had successful mapping missions with both. I don't know about the clones though so make sure to do your research. If you do plan on triggering your camera from APM or Pixhawk based on GPS distance it's generally easier with APM because you won't need to step up the voltage like you need to do with Pixhawk. You can make your own cable or purchase one. With APM the standard USB cable will work. I have a couple of videos that talk about this. Thanks for watching and good luck.
You can do remote shutter over the gopro bus port - there are a few premade options, but I think making one with a bus port breakout and some documentation available online would be pretty easy. When you use your normal camera, do you pull the gps info from the pixhawk, or are you strictly using the built in gps available on the camera?
Zapf Thanks for the tip on GoPro. I have a breakout board and messed with a button to trigger the shutter. Would be interesting to make it remote. Regarding your question about geotagging photos I've done it both ways. Here is a video I did that shows how to geotag with Mission Planner:
ruclips.net/video/ok9bpmUuQnM/видео.html
and I've also let my Canon SX260 HS geotag them automatically, which simplifies things a bit. This is the one:
amzn.to/1zRy7v1
Hope this helps and good luck.
Dennis Baldwin
I think anything you can do with a physical button press can be replicated with a relay, similar to how it works with chdk - you honestly could probably wire it in an identical manner to your pixhawk / apm and it would work. I've simulated physical button presses with a raspberry pi in another application before (a 3DS), and it worked great.
I have a canon powershot s100, and am starting out doing this with an extra Phantom 2 I have - it will do the automatic remote servo stuff (which I can convert into something chdk will like), but I'm not sure how easy it is to pull gps data from DJI's ground station / mission planner, which was why I was inquiring about the accuracy of the built in canon gps vs whats available on the flight controller.
good over view.
I am currently using the a6000 with the sigma 19mm art series but OMG the files are huge.... great resolution though.
subscribed
Guide504 I've heard great things about the a6000. I've been looking at some different options. Glad to hear you're liking it and thanks for sharing.
if you only want it for the remote application get the 5100 its cheaper lighter and has same core features and higher bit rate video.
it has no view finder and a couple of other elements that are not required for our application
CAN this be done with 3d robotics x8? Can you show the maximum zoom you can do and the quality? Overlapping in google maps was a great idea
Renato Jorge Yes it can be done with the X8, but you'll cover less area than you could with a flying wing. Regarding quality I'll see if I can do a follow-up with my NEX-5 but there is a simple calculator you can use to determine the GSD if you know your camera's sensor size:
support.pix4d.com/hc/en-us/articles/202559809-Ground-Sampling-Distance-GSD-
Great video. What settings did you use for the GoPro? Was the quality of it as good as with the other cameras? Also, what altitude?
Awesome. Very high quality and informative. I weren't you working on a downward facing gimbal for mapping? What's the status on that?
Impressive stuff...
Yes, Denis has some awesome videos. On the cutting edge.
Julien Gordon Thanks so much for the feedback. Yes I was/am working on that downward gimbal. My goal is to have a beta by the beginning of next year that I can release on Thingiverse. I'll definitely be sharing my results. Will definitely keep you posted and thanks for asking about it.
I have done a lot of Pix4D work with multi rotors but looking to start doing larger areas with a fixed wing. Can you give me a list of the components in your set up? Fix Wing frame, controller, motors, etc. Thanks
Robison Imagery There are a lot of capable frames out there. I like ***** and his SweepWings products. Other alternatives are the FX-61, FX-79, Skywalker. As for flight controller I only use Pixhawk because it's nothing short of amazing. The FX-61 and FX-79 come ARF with motor, props and everything. I fly with the default components but have been thinking about upgrading. SweepWings comes with a great setup and Ruben uses first class components. Good luck and keep us posted on your progress.
I suppose is not ideal, but a sj4000 camera could be an optiob for aerial mapping? At least as a basic option for starters? Thnks and cheers
John Villa From what I understand that camera is similar to GoPro with the fisheye lens. If so, then it should be okay but you'll need to run it through something like Pix4D or Agisoft Photoscan that can handle the distortion.
Imressive job !, , I have an RVJET (APM2.5) , and want to install my Gopro or my Canon SX260 (CHDK). Can you pls. show how you installed the cameras ? it seems the space is similar between your wing and RVJET. I didn't see that the Gopro can go to 1 sec. with its time-lapse, minimum 2 Sec. Dave
David Behr I had a big cut out in the bottom and then laid some foam board over the cutout. There was a hole cut out in the foam board that the go pro lens can point through. I mounted it downward on the foam board with some kyosho zeal. Worked nicely. I'll try and get some pics of it but right now I have the Canon SX 260 mounted in the wing. This guy:
amzn.to/1zRy7v1
Hope that helps and thanks for the question.
Great stuff! You know that you can change the lens of the GoPro and fly higher to avoid the parallax :) I use the 5.4mm flat lens, super sharp !
Georgi Tushev Thank you. I've been looking at a few different lenses but haven't settled on one yet. Can you share a link to the one you're using?
Dennis Baldwin www.surveilzone.com/5.4mm-10-megapixel-board-lens-for-gopro-hero-3-m12-1-2.3-inch-cl1184
Dennis Baldwin We even tried this lens with Mobius camera and works amazing considering the only 3 megapixel sensor in it.
Georgi Tushev Thanks so much. Looks similar to the one I've been looking at. How was the install?
Dennis Baldwin Not so hard, little scary. There's many videos how to do it. The most difficult part for me was to focus it correctly and fix it. The lens is little loos in the housing.
Hi Dennis, can the APM be used for mapping projects too? How did you get to trigger the camera or was it set to take pictures at intervals? I'd greatly appreciate your help on setting up a one. Thanks so much for sharing.
+Bennie Chiedu Absolutely. Here is a video that shows how to trigger on distance with APM:
ruclips.net/video/MFrs6l-2Brc/видео.html
Good luck and keep us posted on your progress.
+Dennis Baldwin Thanks a lot for your response.
I've been reading about Aerial Mapping for hours today after seeing your video the other day, and it's very interesting video as all other videos i've seen by you. I've downloaded the Pix4D, but have no other camera to try with other than my Sony AS15 at the moment. Do you know the difference between the 3DR Canon SX260 Firmware do as the original doesn't do? (Canon SX260 with custom 3DR EAI software)
Jørn Ramnæs I'm assuming the 3DR firmware may just be a port of CHDK or a custom script. I can't imagine them reinventing the wheel when such a great firmware solution exists. CHDK does things that the default firmware doesn't like provides an intervalometer function through custom scripts. You can also trigger the shutter via USB signal. Plus lots of other stuff available through scripting. Stuff that's important to have for UAV aerial photography that you can't do without it. Glad you're interested in this stuff. Lots of exciting possibilities. Thanks for watching.
Dennis Baldwin Dennis, is there any forums on Aerial Mapping you can recommend for reading and learning? I love flying and after reading about this i want to learn more. I can see why you made the downward gimbal for your camera. i had another winter project(Tarot 680PRO), now it seems like i've got me another one to.
nice job!
Dennis , love the videos bud! Quick question, how do you display your kmls online on your website?
Thanks.
Thanks for the feedback on the videos. I appreciate you following along. If you're talking about displaying maps like this online:
www.unmannedairlines.com/dev/tiger_stadium/
Then that is done via Photoscan, gdal2tiles, and then uploaded to my server and overlaid on Google Maps. I don't use KMLs for this type of work. Hope this helps and in the future I'll be happy to do a more descriptive video of the process.
Dennis,
That is exactly what I am looking for! I would greatly appreciate it if you could make a video about it!
Woh, this is awesome - better than classic google or openlayer html viewer. How did you do the chronologic multi-layer option? Other question, how did you get the alpha channel transparent? I can't find the right argument for this option (-a). Cheers Dennis
Would you be able to make a video for it?
Excellent work, thank you!
+Edward Putnam No problem. Thanks for watching.
Damn this is so cool! Nice video! Keep them coming!
Bruce Banner I definitely will. Thanks for watching.
Hello Dennis, this is a great video. I am very interested to learn about 3d mapping. I have a Gopro4 black, but i don't know how to trigger gopro through pixhawk.
+BISWAJIT BEHERA Thanks for the feedback. Unfortunately I don't know of a way to trigger the GoPro with Pixhawk (or any external cable for that matter). The only way I know to do this is with the built-in intervalometer. Not the best approach, but it works if you're not flying too fast.
Dennis Baldwin thanks for your information.
Great info,thanks.
Jake Bullit No problem. Thanks for watching.
How i can see the estimated flight time ? I can't found on Mission Planer, only in DroidPlaner. Thank you for video !
***** Good question. I'm not sure where to find this but will look into it. If you're planning a survey grid mission it will give you an estimate of how much time the mission will take based on speed. But that doesn't incorporate any realtime data such as battery size, voltage, etc. I'll see what I can find out. This would be useful to have.
Dennis Baldwin I found. When you create a POLYGON on mission planer, and ADD a SURVEY AREA (pop-up a new windows do modify settings etc...) ... they show the estimated time, meters , number os pictures etc...
WOW! nice job.
Bello, are the photos made with gps data?
How is the gopro trigger?
If shooting with GoPro you'll have to geotag the images later. This video talks a bit about it: ruclips.net/video/ok9bpmUuQnM/видео.html
So much info, thanks again....
Google+ sucks balls!!!! You bet. I always get a kick out of your Google+ name as I read through the comments :)
Dennis Baldwin
I was really pissed when I commented on youtube and they told me I had to have a Google+ account, i was not happy.
How are you able to get Pix4D to accept the GoPro images without getting error 0067 and refusing to import images prior?
+Waylon Johnson I never ran into this problem but maybe this will help support.pix4d.com/hc/en-us/articles/202559039-Which-resolution-to-choose-for-the-GoPro-Camera- good luck
I figured it out. The 3D Robotics pro version sold with 3DR drones doesnt support the GoPro. It inly supports the Canon series sold with their Drones.
Great work.
***** Thanks so much for watching.
Dennis Baldwin
Thank you- this is an area of great interest to our group Shenandoah Drones- I have a personal interest for some local friends as well- all agricultural based uses- I think a multirotor will handle their needs for weed maintenance as they would want real time downlinks- but the ability to take those flights and compile them over a season definitely has value and use, so with this software and flight controller I can see lots of applications even on the most basic and simplistic level for small to moderate farms.
Hi Dennis, Nice Work. Did you use air speed on your plane?
+UAVGeo Fotogrametria, topografia e produção visual. Yes. I always use the airspeed sensor on my wings, but rarely do on my multirotors. Thanks for watching.
What hardware/device are you using to control your GoPro 3 cam, while its in flight?
Greyhat Infiltrator I wish it were that fancy, but as of right now I'm just doing time lapse and taking a photo every 2 seconds.
Dennis Baldwin That makes sense, thanks for the response.
Hi Dennis, great video. How do you overlap the new version of images on top of the others?
Hi! You can see what I'm doing here:
www.unmannedairlines.com/dev/tiger_stadium
and maybe this will help: ruclips.net/video/D7do_whEkI0/видео.html
Hey is visual SFM also a grat tool would like if you could make a vid about Visual SFM :)
Allflying Stuff I had problems with VisualSFM running in Parallels on my Mac, but let me revisit soon. I'll let you know what I find out. Yes I agree it's a great tool for the money (free) :) Thanks for the feedback.
hi dennis, this is an awesome information. great video and nice experience. did you connect the pixhawk to go pro using such kind of wire? or just set up the go pro timer for shutter?
I just used the intervalometer built into the GoPro. The best way IMO is to trigger based on GPS distance using CHDK with a Canon camera. Good luck with your project and thanks for watching.
Dennis Baldwin oke i would try your suggestion. good luck for your next video. will be wait for it.
hello dennis,, thanks for your great video :D
Have you ever tried xiaomi yi action cam on your drone?
No I haven't. I've seen them but have never tried one. If I get my hands on one I'll be sure to share my results.
does it have an air speed sensor?
+Tim D Yes it does.
Dennis Baldwin how important is that you use an air speed sensor?
it makes a big difference, my old plane without it would go way off waypoint with a crosswind present.
Seems pretty damn cool! Would help add some profit in the pocket.
David depuy Totally. Assuming the FAA here in the states doesn't over-regulate the UAV industry :)
Hey Dennis, I wasn't sure how to get this to you, but did you see this article about a VERY cool use of Pix4D? gizmodo.com/the-world-now-has-a-perfect-view-of-christ-the-redeemer-1686511839
tpalshadow Yes I did see that and it is amazing! What an awesome project and a great way to showcase the power of Pix4D. Thanks for the link as I enjoyed reading about it again.
hola.Muy bueno tu video, pero tengo unas dudas.Donde estan los puntos d control para amarrar la informacion de tus puntos con los otros punt tomados en terreno?......por otra parte podrias subir los archivos nuevament para procesar la informacion con tus puntos de control(x,y,z) como el Datum y el uso utilizado
?