Create a new meta information for the disk read.
Logically the remote projecting needs to go through the following process:
- Take actual file format
- Project it to the expected file format
- Apply filtering
- Project it to the reduced file format required by the transform
In practice the segmonitors that are used for filtering can be transformed so that they apply to the actual file format. If not then the filtering fields can be transformed one at a time, and the whole row mapped in a single call.