Arch
Definition
A fingerprint pattern in which ridges flow across from one side to the other without recurving and without enclosing a central area. The least common pattern type (approximately 5%). Subtypes: plain arch and tented arch.
Related terms
- ACE-V
- Analysis, Comparison, Evaluation, Verification: the four-stage method for latent print examination used by accredited forensic fingerprint laboratories. Analysis examines the latent in...
- Core
- The approximate centre of a fingerprint pattern. In a loop, it is identified as the innermost recurving ridge's peak or the tip...
- Delta (Triradius)
- The point of convergence of three ridge systems in a loop or whorl, visible as a Y-junction or triangular confluence. Loops have...
- Henry Classification System
- The fingerprint filing and retrieval system developed by Edward Henry with Haque and Bose in Bengal in the 1890s and adopted by...
- Level 1 Detail
- In ACE-V, the broadest level of information extracted from a fingerprint: the overall ridge flow and pattern type (arch, loop, whorl). Level...
- Loop
- A fingerprint pattern in which ridges enter from one side, recurve, and exit on the same side. The most common pattern type...
- Ridge Counting
- For loop patterns: the number of ridges crossing an imaginary straight line drawn from core to delta, excluding the core and delta...
- Ridge Tracing
- For whorl patterns: following the ridge issuing from the inner side of the left delta toward the right delta and recording whether...
- Whorl
- A fingerprint pattern in which at least one ridge makes a complete circuit around a central area, or forms a related closed...
Explained in
- The Henry Classification System and Pattern TypesA fingerprint pattern in which ridges flow across from one side to the other without recurving and without enclosing a central area. The least common pattern t...