Differential gps

Hello fellow odm’ers

Is it somehow possible, to cross gps info on the dataset, with access to a differential gps base? Or is it only possible when the photo is taken by the drone? like the RTK sensors on some drone/sensor brands?
I was imagining something on the line of GCP having some kind of correlation using the time/date of the photos? or accessing the geoid national databases that are updated hourly …

Thanks for any insight!



You may be able to do PPK on the data, but you’d really need the RAW NMEA stream from the GPS for this to work with any accuracy. You can do a workflow like this with RTKLib, or something like Trimble GPS Office.

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