The central component in the RADIUS modelsupported image exploitation paradigm, is the creation of a 3-dimensional model that captures the basic geometry of the site under examination. While many fully automated methods for site model construction show promising results, none are robust or general enough to replace interactive and semiautomatic techniques. In this paper, we outline the suite of site-model construction tools being assembled for the RADIUS program, a sample scenario for their use, and the results of a study to characterize the potential saving of effort they offer.