tietokerroksia

Tietokerroksia is the plural form of tietokerros, a Finnish term used in information technology and geography to describe layers of information within a system. In software engineering it denotes a data access layer that mediates between business logic and the data storage, while in geographic information systems it refers to a map layer containing a set of geographic features and their attributes.

In a software context, the data layer's responsibilities include retrieving, persisting and updating data; translating between storage formats and domain models; and coordinating with caching, transactions and security. The layer aims to separate data concerns from the domain logic and the presentation layer, improving maintainability, testability and the ability to swap data stores or storage technologies.

In GIS contexts, tietokerroksia are individual map layers such as roads, buildings or land use. Each layer carries a dataset and metadata, can be styled or filtered independently, and is combined with other layers for visualization and spatial analysis. Layers may have different sources, update frequencies and access rights.

Key considerations when working with tietokerroksia include data quality, versioning, performance, and governance. The term is widely used in Finnish IT literature and education, and the intended meaning usually depends on the context—data-access layer in software or map layer in GIS.