In order to undertake aerial photogrammetric data processing (orthorectification/image mosaicing) its necessary (preferred) for the 3D position of the camera, its attitude and the time the picture is taken to be recorded as part of the data capture mission.
Companies such as Sensefly, Pteryx, Pix4d etc incorporate this ability in their flight/camera/GPS AP systems.
If DJI is really serious about providing AP/photogrammetry capabilities then at the very least one would need a data log recording the above parameters using the Wookong-M (Ace-one etc) controllers. Another way would be to write this data into the camera's file as part of each photo's EXIF/IPTC metadata file.
As an interim fix can one get a dump file out of DJI 'View'? Then one could get by by syncing the cameras time to GPS time.