In a traditional museum, "preventive conservation" is a master discipline. It is the art of controlling humidity, temperature, light, and dust in a room or storage area to prevent artifacts from degrading. You don't repair the object; you create the perfect environment so that it never gets damaged.
When it comes to digitized heritage and virtual restitution, most institutions mistakenly think that the work stops with the click of the camera. The mask is 3D scanned, the file is on a hard drive, so it is saved for eternity. This is a dangerous illusion. Digital data degrades too. Hard drives die, and above all, computer formats become obsolete.
If we do not apply the standards of preventive conservation to digitized objects, the Digital Twins of African heritage will disappear in less than thirty years. Here is how Ibeji Systems conceives conservation in the petabyte era.
1. Bit Rot and the Law of Obsolescence
The main enemy of a wooden mask is the termite. The main enemy of a digitized mask is software obsolescence.
How many of us today own old floppy disks containing important documents, but no longer have a computer capable of reading them? In ten or twenty years, proprietary 3D modeling software (which costs thousands of euros in licenses) will have changed versions, gone bankrupt, or abandoned their old file formats.
If the 3D scan of a royal throne from Abomey is saved in a closed, proprietary format, that file will become unreadable. It will be trapped in a time capsule to which we have lost the key. This is what engineers call the risk of Vendor Lock-in.
The Solution: Open Standards
The first rule of digital preventive conservation is the absolute and unconditional use of "Open Source" (openly and publicly documented) formats.
- For 3D: Native formats from creation software must be banned, and the final export must be required in
.glTF(GL Transmission Format) or.USDZ. These are the "JPEGs of 3D," open standards adopted by the entire web and mobile industry. - For 2D images: Very high-resolution image archives must be structured according to the IIIF (International Image Interoperability Framework) standard, which guarantees that the image will remain viewable by any future viewer.
- For metadata: The CSV or JSON format, structured according to open ontologies like the CIDOC-CRM.
The open format guarantees that even if the original software disappears, the global computing community will always have the instructions to build a reader capable of opening the file.
2. Storage: Redundancy and Data Hygiene
The second pillar of preventive conservation is redundancy. A mechanical hard disk drive (HDD) has an average life expectancy of five to seven years before experiencing physical failures. Modern SSDs wear out with write cycles.
The 3-2-1 Rule
For museums and Ministries of Culture, the storage of petabytes of museum data must obey the famous "3-2-1" backup rule:
- 3 copies of the data (the original file and two backups).
- 2 different media (for example, hard drives on servers for fast access, and LTO magnetic tapes for deep archiving, because magnetic tapes last over 30 years and are not susceptible to the mechanical failures of disks).
- 1 off-site copy (stored in another city or another building, to guard against the risks of fire, flood, or earthquake destroying the main data center).
Integrity Checking (Checksum)
Data hygiene involves monitoring what is called "Bit Rot" (the silent degradation of magnetic bits on a disk). Ibeji Systems's archive servers regularly calculate "checksums" (mathematical cryptographic fingerprints) of each file. If, after five years, a single pixel of a 3D model is corrupted by a hard drive defect, the checksum changes, the system triggers an alert, and the damaged file is automatically replaced by a healthy copy from the backup.
3. The Sovereign Environment: Isolating to Protect
In a museum, you control the air. In digital, you control the network.
A nation's heritage data (which often includes sensitive information on insurance values, museum security, or unpublished archaeological data) cannot be freely exposed on poorly configured public servers.
Preventive conservation therefore extends to network architecture. This is the essence of the Sovereign Node approach: critical databases are isolated in private subnets (VPC), protected by strict firewalls, and the deepest backups are "Air-gapped" (physically disconnected from the Internet to prevent any destruction by ransomware or cyberattack).
Conclusion: The Curator's New Mission
The profession of museum curator is undergoing a profound transformation. It is no longer just about monitoring the hygrometry of a glass display case. The 21st-century curator must understand the lifecycle of a 3D file, master data governance, and anticipate the obsolescence of computer formats.
Digitizing an artifact does not save the object; it simply transfers the responsibility for its conservation from the physical realm to the digital realm. By adopting the strict standards of digital preventive conservation (open formats, 3-2-1 redundancy, integrity checking, and sovereign infrastructure), Pan-African cultural institutions ensure that their digital archives will not be the IT ruins of tomorrow, but indeed the unalterable memory of future centuries.
Secure the longevity of your digital archives with Ibeji Systems: