Practical Uses
Part of Photography
Photography’s practical applications span medicine, surveying, law, engineering, education, and record-keeping — making it one of the highest-leverage information technologies available to a rebuilding civilization.
Why This Matters
Photography is often thought of as art. It is more accurately a documentation technology. Before photography, every record of the physical world was filtered through human memory and manual skill — drawings that missed details, descriptions that lost precision, measurements that accumulated error in transcription. A photograph captures reality with a completeness and accuracy that no human can match.
In a rebuilding civilization, accurate information is survival. A wrong diagnosis kills a patient. An incorrect land survey creates property disputes for generations. An imprecise machine drawing produces parts that do not fit. Photography eliminates the error-prone human transcription step for visual information. The wound is recorded exactly as it appeared. The land boundary is precisely where the photograph shows it. The machine part is reproduced to the exact dimensions in the image.
Understanding the specific practical applications of photography allows you to prioritize your photographic program. You cannot photograph everything. But you can identify which applications give the highest return on the effort invested in building and maintaining a photographic system.
Medical Documentation
Photography in medicine was recognized within years of the technique’s invention. In a rebuilding scenario, it has several critical applications.
Wound and injury documentation: Photograph wounds at initial presentation and at intervals during healing. A series of photographs reveals whether a wound is healing properly or deteriorating. Photographs can be shown to practitioners who are not present — someone who has never seen the patient can diagnose from a clear photograph.
Technique: Use strong sidelighting to reveal wound depth and texture. Photograph at a known scale — include a ruler or an object of known size. Standardize the viewpoint so comparison photographs can be made reliably.
Skin conditions: Rashes, ulcers, skin infections, and parasitic diseases visible on the skin are amenable to photographic diagnosis. A photograph of a characteristic rash, compared against a reference photograph set (photographs of known conditions), enables diagnosis without specialist knowledge. Build your reference set systematically.
Surgical and procedural teaching: One photograph of a surgical procedure, made by a second person while the surgeon works, teaches the procedure to everyone who sees the print. This multiplies the knowledge from one demonstration indefinitely.
Anatomical records: Fractures, dislocations, tumors, abnormalities — any anatomical finding worth recording should be photographed. These records support treatment decisions, training, and research into patterns of disease and injury in the population.
Land Survey and Property Records
The problem without photography: Land boundaries were historically described in text documents — “from the old oak tree, 40 paces north, then 60 paces east to the large stone…” Trees die, stones move, paces vary between people. Land disputes from ambiguous boundaries have destroyed communities.
The photographic solution: Photograph the boundary markers, the landscape features, and the survey stakes from multiple known positions. A photograph cannot be misread. Combined with written measurements and sketch maps, photographs make boundary records nearly unambiguous.
Aerial-equivalent photography: From a hilltop or tower, a series of overlapping photographs covering the landscape below can be assembled into a rough photo-map showing the arrangement of fields, buildings, waterways, and paths. This takes perhaps 20-30 photographs from one elevated position — a morning’s work.
Construction records: Before demolishing or modifying any existing structure, photograph it thoroughly. Photograph the foundation, the walls, the roof construction, the interior layout. These photographs become the basis for repair, reconstruction, or copying.
Engineering and Industrial Documentation
Machine parts: Photograph components at 1:1 scale (same size as the real part) or with a scale reference. A person in another location can reproduce the part by measuring the photograph. For complex mechanical assemblies, a series of photographs showing the assembly sequence replaces written instructions that are ambiguous without visuals.
Process documentation: Every skilled craft procedure — forging, weaving, wheel-making, kiln firing — has steps that are difficult to describe in words but obvious in a photograph. A photograph showing exactly where to place the chisel, how to hold the bellows, what the clay consistency should look like — these are worth many words of description.
Failure analysis: When something fails — a bridge joint, a dam wall, a furnace lining — photograph the failure immediately before any cleanup or repair. The failure mode is often visible in the structure of the broken pieces. These photographs can be studied later by people not present at the site and contribute to preventing future failures.
Legal and Administrative Records
Identity documentation: A portrait photograph, attached to a written record, creates unambiguous personal identification. Without photographs, identity documents can be transferred, forged, or disputed. With photographs, the holder’s identity can be verified against the record.
Crime scene and incident documentation: Photograph any scene that will later be subject to legal proceedings — damage from fire, flooding, or conflict; evidence of theft or violence; conditions at the time of an accident. A photograph captures details that witnesses miss or misremember.
Property inventory: Photograph the contents of storerooms, warehouses, and public buildings. A systematic inventory photograph series, made annually, provides an unambiguous record of what was present at what time — invaluable for auditing, succession, and legal disputes.
Education and Knowledge Transmission
Teaching materials: Photographs of correct and incorrect technique, of specimens, of anatomical structures, of geographic features — these replace the need for the student to physically observe the subject. A student of botany who has never seen a particular plant can learn to identify it from a photograph. A student of medicine can study a disease condition without a patient being present.
Reference collections: A systematic photographic reference collection, organized by subject, is one of the highest-value knowledge assets a rebuilding community can build. Reference photographs of:
- Medicinal plants (with scale, multiple angles, distinctive features)
- Soil types and conditions
- Insect pests and diseases
- Machine parts and tools (with dimensions)
- Geological features (mineral identification)
Each set of reference photographs, properly labeled and stored, multiplies the effective knowledge of every person who consults it.
Distance learning: A photograph of a procedure, with numbered steps written below it, can be sent to a remote community by messenger. The recipient can follow the procedure without an instructor being present. This is especially valuable for medical procedures (emergency surgery, childbirth complications), technical operations (kiln firing schedules, chemical procedures), and agricultural timing (when to plant, how to identify the right growth stage).
Prioritizing the Photographic Program
With limited plates, chemicals, and processing capacity, prioritize by impact:
| Priority | Application | Reason |
|---|---|---|
| 1 | Medical wound documentation | Directly saves lives |
| 2 | Land survey and boundary records | Prevents community-destroying disputes |
| 3 | Machine and tool documentation | Enables manufacturing replication |
| 4 | Identity photographs | Prevents fraud and identity disputes |
| 5 | Medicinal plant reference | Reduces fatal misidentification |
| 6 | Agricultural technique | Multiplies food production knowledge |
| 7 | Historical/architectural record | Preserves knowledge for future rebuilding |
The most photographic value comes from subjects that are unrepeatable (a wound at presentation, a failure mode, a specific person’s appearance), that involve information that is hard to describe verbally (precise visual appearance, dimensions, spatial relationships), and that need to be communicated to people who were not present.