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Messages - aerial_survey

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1
Latest update rectified the issue? I don't want to upgrade unless it has? Thanks

2
Still no fixes for this I gather?

3
General / Re: Datum Transformation / Coordinate Shift
« on: December 14, 2022, 06:20:19 AM »
Hi Guys,
I need something like this but to process the job GRID to GROUND, all GPS/RTK data is on GRID but i need to scale the job from a known point. Do you know if there is a way?
Thanks
Allan

4
Hi There,

I am using a Phantom4 RTK unit and have both GPS RTK control and Images from the drone on GRID and id like to know the work flow to process this job on Ground or move it. The scale factor is about 305mm per kilometer so over my job about 1.5km the error from grid to ground will be about 0.5m.

I am working on MGA 2020 Zone 55 in New South Wales Australia.

the CSF CONVVERGENCE AUSGOID2020 SCALE FACTOR IS 0.999695 AT  Permanent Mark 1605 MGA2020 644062.882 5966592.975 zone 55 RL 1003.52


Appreciate if you can help.

Thanks

Allan

5
General / Phantom 4 RTK Errors
« on: September 12, 2022, 09:45:39 AM »
HI There,
Im trying to work out why my RTK errors are considerable and the flag sits quite far from the cross. The job is in rural New South Wales. I did another job close to Sydney and was perfect. Id just like to know why these rural jobs seem to have a bigger error. Appreciate anyone can shed some light.
Thanks
Allan

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Camera Calibration / Re: Phantom 4 RTK - camera parameters
« on: February 15, 2022, 04:46:36 AM »
HI David,
Can you be more specific please? Im having the same issues...
Thanks
Allan

7
General / CGP's and altitude
« on: August 16, 2021, 10:14:28 AM »
HI There,
I am using many GCP's for a large area, but my results are not coming back at a good accuracy.
When I have added the flag to the GCP's like 4-6 I then optimize camera alignment. Should i be able to then check the marker height to the imported CSV height, they are about 150mm different? SDhould the height get adopted to the csv always?
see attachement...
Thanks
Allan


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General / 3Dconnection not working on update?
« on: July 18, 2019, 06:46:37 AM »
HI
I Have just updated The latest version 1.5.3 8469 and have notices the 3Dconnexion mouse is nos missing?
Any ideas?

9
General / Re: DJI Phantom 4 RTK
« on: October 18, 2018, 01:34:49 AM »
RTK might be good, but working for a Surveying Company, how do you check your RTK Data? We always use independent ground control to check at least 10 areas randomly, a lot of people out there just think its correct, without any checks, pass data to client.

Note: We had some LIDAR data captured for us by drone, we checked their RTK data with our Ground control, its was OVER 2m OUT!! BEWARE!! :-[

We now do the work ourselves.

They made bad mistakes, Trust your Surveyor!

10
Hi There,
Did you manage to work this out? I am getting some holes in my Ortho Image too and want rid of them.
Appreciate anything on this.
Thanks
Allan

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General / RAIL LINESURVEY-Single line of Images (20km) with GCP's
« on: July 10, 2018, 04:08:49 AM »
Is it bad practice to Survey  a rail line with a single centreline using ground control points using only overlap front and back OR should I at lease run 2 lines along the rail line?
Thanks in advance

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