The project was stored on adapted LaserDiscs in the LaserVision Read Only Memory (LV-ROM) format, which contained not only analogue video and still pictures, but also digital data, with 300 MB of storage space on each side of the disc. Initial estimates indicated a total storage capacity of 2 GB per disc, described as sufficient for 80,000 pictures (including satellite images) and "half a million text pages" plus software to process maps and graphical information. The delivered product was estimated to offer a "total potential capacity" of around 1400 MB with half of that capacity filled.