Musicmap is a visual genealogy that introduces the history of, and relationships between, popular music genres. The incorporation of database construction with verbal and multimedia elaboration not only builds the macroscopic frames of popular musical genres, but also highlights the ambiguity and inconsistency in regard to individual cases. In addition, effective visualizations such as color coding, gridding, and family tree symbols balance the complexity of the subject with accessibility for the users to capture the information. Musicmap is a good example of a digital humanities project that contributes to both public knowledge and professional studies.