What is the term for a map that is used as a base upon which additional data of specialized nature are compiled, including base maps such as MBIM, BBIM, and CM?

• A. Topographic Map
• B. Base Map
• C. Thematic Map
• D. Reference Map

Answer: (B)

A base map serves as the spatial framework for a project. It provides the fundamental geographic reference—coordinates, extent, and commonly used features like boundaries, roads, and water bodies—on which additional data layers or specialized information are built. The examples MBIM, BBIM, and CM are standard base maps used as starting layers before adding other datasets, ensuring all information aligns to one consistent reference. Other types emphasize specific themes or purposes (topographic maps focus on terrain, thematic maps highlight a particular variable, and reference maps are general-purpose for orientation), but they don’t function as the foundational layer for compiling diverse data in the way a base map does.