Lake (Enclosure)
Definition
A minutia in which a ridge briefly splits into two and immediately re-joins, enclosing an oval space. Less common than endings and bifurcations; reliably detectable in good-quality prints.
- Definition
- Ridge splits into two and rejoins, enclosing an oval space
- Classification
- Fingerprint minutia type
- Frequency
- Less common than ridge endings and bifurcations
- Detectability
- Reliable in good-quality prints
Common questions
How is a lake distinguished from a similarly shaped ridge feature?+
A lake is identified by the ridge splitting and rejoining to enclose a distinct oval space, whereas a short ridge or dot lacks that enclosed area, so examiners look at the enclosed space itself, not just the ridge shape, to classify it correctly.
Why does the relative rarity of lakes matter in a fingerprint comparison?+
A less common minutia type carries more discriminating weight when it appears at corresponding locations in two prints, since its match is statistically less likely to occur by chance than a match on a common minutia type like a ridge ending.
Related terms
- Bifurcation
- A minutia at which a single friction ridge divides into two diverging ridges. One of the two most common minutia types (with...
- Blind Verification
- The procedure in which a second fingerprint examiner independently performs the Analysis and Comparison stages without knowledge of the first examiner's conclusion....
- Champod Minutia Frequency Study
- Empirical research by Champod and Evett (2001) characterising the frequency distributions of minutia types and spatial configurations from operational fingerprint databases, providing...
- FRStat
- The fingerprint statistical scoring model developed by the FBI Laboratory and Iowa State University (Professor Alicia Carriquiry). Takes ACE-V comparison documentation as...
- Galton Features
- The set of observable ridge events catalogued by Francis Galton in his 1892 monograph, including ridge endings, bifurcations, and enclosed formations. The...
- 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...
- Level 2 Detail
- The intermediate spatial scale: individual minutia (ridge endings, bifurcations, lakes, dots, islands, deltas, cores). Carries the principal discriminative weight in a fingerprint...
- Level 3 Detail
- The finest spatial scale: sweat pore positions, ridge edge contours, incipient ridges. Reliably interpretable only in high-quality inked or latent prints. Used...
- Ridge Ending
- A minutia at which a single friction ridge terminates abruptly. One of the two most common minutia types (with bifurcations). Encoded in...