Pohjapinnasta

Pohjapinnasta is a Finnish phrasing that refers to information, samples, or features taken from the bottom surface of an object or structure. The construction combines pohja, meaning base or bottom, with pinta, meaning surface, and the suffix -sta, which marks from or of in Finnish. Thus pohjapinnasta literally conveys “from the bottom surface” and is used in contexts where the location of a measurement, sample, or observation is specified relative to the lower boundary.

In practice, pohjapinnasta appears in technical and scientific writing as part of longer phrases. For example, näytteet otettiin pohjapinnasta means “samples were taken from the bottom surface,” and ominaisuudet pohjapinnasta on determinedRefer to base surface properties. The term is common in fields such as geology, soil science, materials science, and engineering when distinguishing data originating at the underside or lower interface of a specimen, layer, or component.

Usage notes: pohjapinnasta is not a standalone technical concept but a grammatical form that depends on context. Its exact meaning is shaped by the subject matter and accompanying terminology, so writers often pair it with more specific descriptors (for example, pohjapinnasta määritetyt fysikaaliset ominaisuudet or pohjapinnan alapuolisen tilan analyysi) to avoid ambiguity.

See also: pohja, pinta, pohjapinta, elatiivinen tapauksia.