referenssikartan

A referenssikartta, often translated as a reference map or key map, is a cartographic tool used to show the spatial relationships between different map sheets or areas. Its primary purpose is to help users locate a specific map within a larger collection or to understand the geographical coverage of a series of maps. Typically, a referenssikartta displays the boundaries of individual map sheets, often with their corresponding sheet numbers or names. It may also indicate the scale and projection used for the maps it references.

These maps are essential for navigating large-scale mapping projects, atlases, or geographical databases. By presenting an overview of the entire area being mapped, a referenssikartta allows users to quickly identify the relevant sheet for their area of interest without having to examine each individual map. They are commonly found in the introductory pages of atlases, within map catalog systems, or as standalone documents accompanying map series. The design of a referenssikartta prioritizes clarity and comprehensibility, often using simplified landforms and political boundaries to highlight the organization of the map set rather than detailed topographical information.