Please select Into the mobile phone version | Continue to access the computer ver.
Photogrammetry with A2
8568 20 2014-11-10
Uploading and Loding Picture ...(0/1)
o(^-^)o
c.debeer
lvl.1

South Africa
Offline

I  am close to the point of pulling the trigger on a photogrammetry setup.

i  am a geotechnical engineer and I want to photograph mine  highwalls and road cuttings. the end result will be 3D  model indicating slope failures and joint orientations.  One of the multirotor setups I am considering is the S900 with Z15 and Nex camera.  I  stil  have to decide on the controller A2 or WKM. i would preffer the A2 with its better accuracy if it works.....

I understand that the useable mapping software for the A2 is in final testing phase......
Will the upgraded software and firmware be able to do the following:
1. Create flightplan of  vertically stacked waypoints or a vertically ofset  stacked flightplan in a straight line or curved surface. (This is to follow the contours of a cutting keeping the drone at approximate  constant distance from the face).
2. Will you be able to pre program the camera tilt between two waypoints and change it for the next set of waypoints?
3. How do the system define the positions to trigger the camera?
4. Is there more than one way of triggering the camera? At predetermined waypoints, distance between waypoints or timelapsedbased on groundspeed?
5. Will you download the actual flight path with GPS Satelite time-stamped  coordinates?   


Any feedback or a video demonstrating the mapping capabilities of the A2 will be greatly appreciated.

Thanx in advance.

Thaba Raptor

2014-11-10
Use props
Tahoe_Ed
Captain
Flight distance : 2605 ft
  • >>>
United States
Offline

Thaba, I am trying to get a specialist to respond to your questions.  Photogrametry is a very specialized sub-set of our Data Link waypoints program and I do not want to give you answers that may only be half right.  Thank you for your interest in DJI products, we will have an answer for you shortly.
2014-11-10
Use props
c.debeer
lvl.1

South Africa
Offline

Thanx Tahoe,

DJI is my preferred supplier but I need to know if it will work for my specific application.

One thing I did forgot to mention is that I will be using it is a single operator environment from a Futaba 14 SG radio, therefore the the need to program the route carefullyand programming of the gimbal actions at or between waypoint.  I will be working within visual range.

Can you comment on my equipment selection and recommend anything else not included.

Thanx in advance.
2014-11-11
Use props
c.debeer
lvl.1

South Africa
Offline

When using a Z15 gimbal and a NEX5 camera with an A2 controller, where do you plug the IR shutter control of the Z15 into, to allow for automatic shutter release by the mapping function when photographs is taken at the pre-determined locations during a phogrammetry project?
2014-11-11
Use props
diegobajo
New

Spain
Offline

Hello everybody,

I'm having some troubles with the photogrammetry tool in the sense that I can't get to know how to set the waypoints properties (period,repeat time,startdelay,repeatdistance) I mean, I don't know exactly how the photos are taken, or how to set the angle.
For example, I want to fly an area of 200mx300m. I set all the camera parameters,overlap, height and in the preview I can see all the waypoints and the number of photos but don´t know the yaw angle where they will be shot. Can anyone help me understand this?
2014-11-11
Use props
coinfaslab
lvl.4
Flight distance : 153343 ft
Italy
Offline

diegobajo Posted at 2014-11-12 01:42
Hello everybody,

I'm having some troubles with the photogrammetry tool in the sense that I can't ge ...

Hello everyone ,
I have a problem with the update to version 4.0.11
I downloaded and installed the software from the site, but the launch tells me that there is an update to 4.0.11 .
A help?
2014-11-11
Use props
diegobajo
New

Spain
Offline

coinfaslab Posted at 2014-11-12 03:10
Hello everyone ,
I have a problem with the update to version 4.0.11
I downloaded and installed the ...

Hi,
I had no problems with the update. I opened the program and once the message was shown, I clicked to download and install and worked good.
2014-11-12
Use props
coinfaslab
lvl.4
Flight distance : 153343 ft
Italy
Offline

diegobajo Posted at 2014-11-12 19:58
Hi,
I had no problems with the update. I opened the program and once the message was shown, I clic ...

Fixed
After the upgrade, run the program in compatibility mode Windows XP SP2 .
Check the version , and then you can remove the Compatibility
2014-11-12
Use props
c.debeer
lvl.1

South Africa
Offline

Tahoe-Ed any feedback from the specialist yet on setting up the flight plan along curved paths and vertically stacked flightplan.
what about the tilt angle and the extra shutter?
2014-11-17
Use props
Ariha
lvl.1

Norway
Offline

Tahoe_Ed Posted at 2014-11-11 11:44
Thaba, I am trying to get a specialist to respond to your questions.  Photogrametry is a very specia ...

I have exactly the same question, it's very frustrating to look for information about these functions is described by Dji, but that has no explanation for anything extra is needed in addition to put this into operation. I can not see any output on MC is dedicated to this purpose. Dji please reply to this so we do not spend more time searching for answers, if this really is thought of as a future feature.
2014-11-19
Use props
Tahoe_Ed
Captain
Flight distance : 2605 ft
  • >>>
United States
Offline

Please view this video.

2014-11-19
Use props
info
lvl.1

Germany
Offline

RE: Photogrammetry with A2

Tahoe_Ed Posted at 2014-11-19 21:50
Please view this video.

https://www.youtube.com/watch?v=mTl_lpr0-s0

Hallo DJI
The settings in the video are OK! But the camera trigger didn't work with the A2. I worked with the WKM And everything is OK! What is the Problem with the trigger funktion?
Thomas
2014-11-19
Use props
Tahoe_Ed
Captain
Flight distance : 2605 ft
  • >>>
United States
Offline

The F2 function was supposed to be fixed with v2.4 of the A2 firmware.  What version are you using?
2014-11-19
Use props
Ariha
lvl.1

Norway
Offline

Tahoe_Ed Posted at 2014-11-19 21:50
Please view this video.

https://www.youtube.com/watch?v=mTl_lpr0-s0

Hi

I have Wkm, Where do I connect servo for camera trigger?
2014-11-19
Use props
Tahoe_Ed
Captain
Flight distance : 2605 ft
  • >>>
United States
Offline

I will have to refer you to the manual.  

http://download.dji-innovations. ... Manual_en_v3.02.pdf

Page 34.  You will need to connect F2 for shutter control.
2014-11-19
Use props
Ariha
lvl.1

Norway
Offline

Tahoe_Ed Posted at 2014-11-20 11:08
I will have to refer you to the manual.  

http://download.dji-innovations.com/downloads/groundstati ...

Thank you for your quik answer
2014-11-20
Use props
info
lvl.1

Germany
Offline

Hallo
How does the camera trigger works when I have the gimbal in F2 of A2. I don't understand the settings in the manual Page 34.
Thanks!
2015-2-3
Use props
DJI-Jackson
lvl.4
Flight distance : 51243 ft
  • >>>
Hong Kong
Offline

info@b-gis.de Posted at 2015-2-3 20:20
Hallo
How does the camera trigger works when I have the gimbal in F2 of A2. I don't understand the  ...

Hi, you have to add one more reciever to AUX2 channel on GCU if you want to control gimbal during the Waypoint mission. And need one more RC of course.
2015-2-4
Use props
HMArnold.msn
Second Officer
United States
Offline

Ariha Posted at 2014-11-19 19:11
I have exactly the same question, it's very frustrating to look for information about these functi ...

I have an S1000+/A2/Lightbridge/IOSD MK II/900Mhz Datalink/Zenmuse Z15/Dual Futaba 14SG and use a Sony A6000 camera.

The bottom line is that this configuration can be used with the PC Ground Station Photogammetry system to outline a grid pattern and take orthogammetric images.

The above equipment was purchased in November, 2014 specifically to take commercial orthogammetric images, and it has taken me this long to figure out how to make it work.

Getting the whole show to work for manual flight and image/video operation was relatively straightforward for me because I purchased an entire package from a dealer.

Once you have manual flight and camera control mastered, these are the basic steps needed to get the photogammetric tool to work:

1)        You need to be connected to the UAV before you make any changes in parameters. The software doesn’t remember or save anything – it copies and writes everything to the UAV, so you have to be connected.

2)        Images are taken for autonomous missions using the “GP SERVO ACTION”, which are a sequence of commands associated with each leg of the flight grid. For missions defined using manually entered waypoints, these commands can either be set up on a time/frequency or distance traveled basis. The Photogammetry tool defines these for you based upon several parameters that relating to the camera and lens that I don’t understand and don’t think work properly, but can be worked around. The way I did it was to pick a mission altitude and speed, then use trial and error with the “FOCAL LENGTH” setting in the tool until the pictures overlap. For me, flying at 100 meters, the “FOCAL LENGTH” setting needs to be 30mm even though I’m using a 70mm lens. To set up the “GP SERVO ACTION” parameters, I used the Lightbridge assistant to see that manually throwing the shutter switch on the camera Futaba caused the signal to go from a negative 1000 to a positive 1000, then releasing the switch caused the setting to go back to negative 1000. On the “GP SERVO ACTION” screen, enable the “ACTION MODE ON/OFF and set the “NATURAL SERVO POSITION” to -1000. Then for the “ACTION STEP 1”, set the “SERVO POSITION” to 1000 and the “STAY TIME” to 1 second. As near as I can tell, the actual command to take an image is generated on the A2, and it goes out the F2 port on and side of the MC, through a 3 wire jumper to the “SHUT” port on the Zenmuse. For me this means that every time I fly manually I have the wire that goes to the Zenmuse “SHUT” port hooked up to me SBUS decoder board set up by the dealer, then when I want to fly an autonomous mission, I swap that wire from the SBUS decoder board and plug it into the F2 port on the A2 MC.

3)        You have to make sure the A2 has no other signal mapped for the F2 port. For my system, on the A2 Assistant “ADVANCED/GIMBAL” tab I thought the setting for “GIMBAL SWITCH” needed to be enabled because I use a gimbal, but evidently that is only the case if you have a non-Zenuse gimbal, because the Zenmuse comes with its own controller, and the output for pitch and roll on the A2 is not required. If you DO have the “GIMBAL SWITCH” enabled, evidently the A2 overrides and GP SERVO commands with pitch and roll outputs for the non-existent gimbal. If you research deep enough, you will find that the ROLL command output of the A2 uses the F2 port, and thus be default disables any GP SERVO commands to the camera shutter. This knowledge cost me about a month of trial and error, with absolutely no help from anyone at DJI after repeated support calls, emails, and requests on the DJI Forum. It was finally someone on the forum named David Fuentes that suggested if disable any other mapping to the F2 port.

4)        Once you have the signal path from the Ground Station software, through the 900Mhz Datalink, into the A2, you can test it using the “TRIGGER” button on the “GP SERVO ACTION” screen to take a picture. Since I couldn’t get the camera to work in autonomous flight, I kept thinking the “TRIGGER” switch didn’t work, so I would actually pack everything up, go out to a field large enough to define a photogammetry mission, and actually fly the mission to test any changes I thought might help. It would have been much easier if I knew that the “TRIGGER” button really does send a live shutter command to the camera, even if the S1000+ is sitting powered up on a table with the arms folded down.

My only remaining problem is that now that I can take pictures on autonomous missions, I can’t get the GPSEXPORTER program to work. I’m not alone in this, as people on external forums as well as the DJI forum have the same problem.

In November, DJI issued a firmware upgrade for the IOSD MK II to V3.02, which I was dumb enough to load. I still don’t know if that upgrade had any useful effects, but I do know that it made it so the FLY???.DAT files generated on the IOSD and required for the GPSEXPORTER and DATAVIEWER were no longer compatible.

I also learned that once you do a firmware upgrade, there is no going back, so you’re stuck with $15,000 of equipment that can’t report where it was when you took the pictures.

I actually purchased a second IOSD Mk II that didn’t have the upgrade, but still I can’t get the GPSEXPORTER to give me anything but blank TXT files.

Again, my various attempts to get any level of support have gone unanswered, and my only hope at this point to for someone else that has gotten data from a FLY???.DAT file to tell me how they did it.

It was a serious mistake on my part to invest in a DJI S1000+ system for a commercial application. At this point I think that DJI made things like the PC Ground Station, DataViewer, and GPS Exporter to get people like me to purchase their equipment, but now that they show the videos on their marketing web pages, they are either unable or unwilling to either document them or get them to work.

My email address is HMArnold@msn.com, and if you send me an email I'll send you screen shots of anything you have questions about
2015-2-20
Use props
davidfuentes.op
lvl.2
Flight distance : 1155538 ft
Spain
Offline

HMArnold.msn Posted at 2015-2-21 04:22
I have an S1000+/A2/Lightbridge/IOSD MK II/900Mhz Datalink/Zenmuse Z15/Dual Futaba 14SG and use a  ...

incredible post! great job. It will save a lot of time to others.....
2015-2-24
Use props
HMArnold
Second Officer
United States
Offline

It turns out that DJI has been working on a solution that solves both the DataViewer and GPSExport problems at the same time, and I can report that the solution does work for both.

The GPS Export function creates a properly formatted text file that contains, Lat, Lon, Altitude, Pitch, Roll, and Yaw for every point where a GP Servo action point was triggered in a PC Ground Station autonomous mission.

It currently takes a significant amount of effort on both ends to get everything up to speed, but as I understand, everything required will be published normally in the next revision of firmware and software updates.

For information about the availability of the fix, I suggest you contact

yi.zhang@dji.com

directly.
2015-3-13
Use props
Advanced
You need to log in before you can reply Login | Register now

Credit Rules