In this work I seek to formulate a theory of the computational implications of certain factors that affect human navigation in multiscale electronic worlds. Specifically, I seek to describe the properties a multiscale world must satisfy to furnish useful frames of reference. I draw factors from three areas. First, understanding of spatial cognition in general and frames of reference in spatial cognition in particular. Second, theoretical characteristics of multiscale information spaces. Third, general attributes of users' task contexts. The ultimate goal of the work is to provide a basis for a theory of design of navigational aids. This project also seeks to provide a case study of integrating existing psychological theories with emerging theories of computational environments.