Autel Evo II Enterprise Pro 6K with RTK Drone - Imagery Not Georeferencing The Same

[Malli35998]

Both shot with the same drone with RTK Module installed but toggled off. AGLs were different (250’ AGL vs 200’ AGL). Why don’t they match? See attached photo and screen captures below.

Please explain to me why the 250’AGL Orthomosaic is georeferenced correctly and the 200’AGL Orthomosaic is poorly georeferenced.

Autel Evo II Enterprise Pro 6K with RTK Module – 250’ AGL

• RTK Aircraft Feature Toggled OFF
• RTK connection options set to None
• Good georeferencing with the ground

Autel Evo II Enterprise Pro 6K with RTK Module – 200’ AGL

• RTK Aircraft Feature Toggled OFF
• RTK connection options set to None
• Poor georeferencing with the ground

 

[elistechnology]

Can you give more details?
Timestamp file from both missions would be best to see whats going on.

 

[Malli35998]

See attached screen captures of orthos in this GIS app I use. 250’ AGL looks good, 200’ AGL Is poorly georeferended. Same drone, same survey area, RTK turned off. No GCPs. Normally, the orthos I create using the Evo IIs are very close to the underlying GIS imagery.

 

[elistechnology]

Thats 12 feet, it can be GNSS positioning error. (30ft would not be a surprise)
I'll try to check that out when the weather alows me. It will be important to check repeatability of this error.

 

[Malli35998]

Thanks! This is very unusual. I have flown many, many surveys over this site. This has been my test site since 2017. I rarely see this anything close to this kind of error, no matter which drone I use. Perhaps it is a one-off.