Ballistic Imaging -
https://books.google.com/books?isbn=0309117240 -
National Research Council, ‎Division on Engineering and Physical Sciences, ‎National Materials Advisory Board - 2008 - ‎Political Science
The rifling carved into the barrel takes the form of grooves separated by raised areas, known as lands. These lands and grooves create corresponding engraved ...

https://www.proz.com/kudoz/english-to-spanish/military-defen...
raised lands | English to Spanish | Military / Defense - ProZ.comwww.proz.com › 6586459-raised-lands- Translate this page
Nov 7, 2018 - El ánima rayada de un arma se obtiene al grabar estrías o surcos ... de bala disparada que fueron enterradas por las "tierras elevadas" dentro de un barril estriado. ... se producen al mecanizar ranuras en espiral (estriado) en la superficie ... The lands and grooves appear as raised and lowered areas, ...
Los cañones de ánima poligonal tienden a tener una vida útil mayor, al reducir el desgaste que producen los bordes afilados de los surcos del ánima rayada convencional moderna.


Ánima rayada - Wikipedia, la enciclopedia libre
https://es.wikipedia.org/wiki/Ánima_rayada
El ánima rayada de un arma se obtiene al grabar estrías o surcos helicoidales en el interior del cañón de un arma de fuego, lo que al disparar imparte un ...
La mayoría de armas modernas tienen surcos de bordes afilados. Más recientemente, el rayado poligonal, uno de los primeros tipos de rayado de cañones, ha empezado a resurgir, y se ha puesto de moda, especialmente en el diseño de pistolas. Los cañones de ánima poligonal tienden a tener una vida útil mayor, al reducir el desgaste que producen los bordes afilados de los surcos del ánima rayada convencional moderna. Los partidarios de este diseño aducen mayores velocidades y mayor precisión.


https://en.wikipedia.org/wiki/Rifling
The grooves most commonly used in modern rifling have fairly sharp edges. More recently, polygonal rifling, a throwback to the earliest types of rifling, has become popular, especially in handguns. Polygonal barrels tend to have longer service lives because the reduction of the sharp edges of the land (the grooves are the spaces that are cut out, and the resulting ridges are called lands) reduces erosion of the barrel. Supporters of polygonal rifling also claim higher velocities and greater accuracy. Polygonal rifling is currently seen on pistols from CZ, Heckler & Koch, Glock, Tanfoglio, and Kahr Arms, as well as the Desert Eagle.