Unmigrate

I could “unmigrate” the tapes, and that would take a while, but it wasn't that much of a nuisance and it helped keep the mainframe's disks free.

If the line is to be perpendicular to the strike, we can unmigrate the seismic data, as shown in Fig. 21.6, and we then know how far we have to run the seismic line to tie the well data at any given depth.