Yes, I have created a support ticket with Pix4D support, to query why it’s not currently aligning. I have unlimited access to this Camera and am out in the field approximately 3 times per week. We conduct surveys across the UK and are testing this camera out, so when I am on site conducting a survey, I will finish off and then put this camera up to do some test flights.
The only issue we may see is I do not use ground control points. We survey solar farms and creating an orthomosaic and DEM is not our primary concern, this is a trial to see if it’s a viable delivarable to add to our current offering. If we can accurately and efficiently create a thermal orthomosaic of the site then we can begin adding this to our offering as a bonus feature.
I currently have two complete data sets for two different sites, taken at 60m and 65m above ground level. They definitely have sufficient overlap because they calibrate and align 100% in Agisoft. The one site, I flew at 65m Above take off, taking an image every 2seconds, 4m/s flying speed, double grid pattern flown with drone deploy as the flight planning app - the overlap was set to 80% however due to the size of the sensor I’m not sure this actually changes anything - typically the flight plans are based off an RGB sensor for example the phantom 4 pro which is a lot bigger I believe. Regardless, I flew a double grid/cross hatch pattern. There is definitely sufficient overlap. I have stitched this set all the way to the orhtomosaic stage in AGISOFT, but here is where I am struggling to export a radiometric orthomosaic. Haven’t done one before.
Hence I looked now at Pix4D as I know some people have had success with it previously, I am currently using a Trial version but it may expire in the next few days so I hope to be successful before then.
The second data set was flown at 60m AGL, flying at 4m/s, flights were planned manually with Litchi flight planning. Images captured as Radiometric JPG every 2 seconds. Parallel flight lines, approximately 15m between each line so the overlap is definitely sufficient. The drone was oriented North (solar panels are south facing) and I was flying waypoints along the rows of panels (east to west). Again this imagery aligns perfectly in Agisoft but does not seem to align in Pix4D (this is the set I refer to in my first post above).
I have contacted Flir Directly regarding the camera specifications and they say it is the same sensor as the Tau2 but they then sent me incorrect data - so I have escalated the enquiry further and am waiting to hear back.