How do you Process RTK Data with a DJI M300

[dainel40]

Hello,

I want to know the proper way to process RTK data with a DJI M300. I don't want to use GCP's just only the data from the RTK. The problem I'm having is that my elevation is wrong, how do I correct the RTK elevation to properly convert to my Coordinate system?

[Paulo]

Hello Daniel,

we would need more information like :
- how are the rtk coordinates calculated  (real time or Posprocessed)?;
- what is the CS used for the RTK coordinates?;
- if you have a look at imege Exif then you can see the RTK coordinates stored with their accuracy and posotionong mode (single point, cm fixed ambiguity). Maybe you can post an example or Exif extract...
for example this extract from the exif of a DJI RTK Image shows that stored coordinates are at the meter level (RTKflag = 16 and RTKStd in aech axis at m level). IIn such a case you would need to posprocess the the drone GNSS data relative to a base to get precise cm level coordinates:

Code: [Select]

---- XMP-drone-dji ----
Version                         : 1.4
GpsStatus                       : Normal
AltitudeType                    : RtkAlt
GPSLatitude                     :
GPSLongitude                    :
AbsoluteAltitude                : +121.668
RelativeAltitude                : +109.983
GimbalRollDegree                : +0.00
GimbalYawDegree                 : -124.40
GimbalPitchDegree               : -89.90
FlightRollDegree                : +7.10
FlightYawDegree                 : -123.00
FlightPitchDegree               : +1.50
FlightXSpeed                    : -3.9
FlightYSpeed                    : -6.0
FlightZSpeed                    : 0.0
CamReverse                      : 0
GimbalReverse                   : 0
SelfData                        :
RtkFlag                         : 16
RtkStdLon                       : 0.87811
RtkStdLat                       : 0.85544
RtkStdHgt                       : 2.40905
RtkDiffAge                      : 0.00000
SurveyingMode                   : 1
Without more info it is difficult to give some advice,