Drone Mapping - Pix4D Tutorial - Basic Workflow with GCPs

If you want to learn Drone Mapping then check out my online course series:
dronemappingcourse.com
Check up my company's website (Polish only):
mapyzdrona.pl/

[@lediozajmi3961]

When someone refers to the map accuracy, say 2 cm accuracy, that means that for instance in Pix4d, the GCP RMS error is 2 cm?

[@jeremywilson5143]

My question is why do you choose to make some check points and some GCP's, what made you decide to do that? That could be something important maybe?

[@TanM]

Exactly, I had the same doubts.

[@Seb_1212]

to have more precision on the mapping!

[@OmarHebshi]

I have question You have custom points and you to point them 10 times each but the question Where you get their x y z information before you paste it in PIX4D?

[@jeremywilson5143]

usually you have a land surveyor observe established ground control points with an RTK/GPS unit and they'll send you the X,Y,Z of those ground control points they established for you and it will be in a CSV or TXT file, then that's when you import into PIX4D. Hope this helps.

[@MichaelRHead-zv2zf]

you missed a very important instruction on how you created the GCP file. That would have helped a lot of people out

[@jeremywilson5143]

usually you have a land surveyor observe established ground control points with an RTK/GPS unit and they'll send you the X,Y,Z of those ground control points they established for you and it will be in a CSV or TXT file, then that's when you import into PIX4D. Hope this helps.

[@dahaproject3498]

how to fix error e0015? when I input GCP csv. wrong format. I follow procedure. please solution

[@cezarywozniak6778]

Fix the format. Use four columns. GcpName,x,y,z Example: Point1,32156.14,13462.12,123.22

[@dahaproject3498]

@@cezarywozniak6778 ok I fix it. Thx. now works

[@anemoi2634]

How does pix4d know your flight path and where you took the photos?

[@cezarywozniak6778]

Based on GPS tag of each image, time of each image and common features between images

[@anemoi2634]

Ah, so the images necessarily need geo tags?

[@cezarywozniak6778]

It is possible to align images without geotags but it will process much slower and the project can be misaligned and not accurate

[@DavidGarcia-sv2zg]

Carlos Carrillo