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A fully automated Chimera methodology has been developed in this study to provide geometric or stencil information required to facilitate intergrid data communications. Chimera-holes are cut automatically in each grid of an overset grid system based on whether the grid overlaps with Non-Penetrable Surfaces (NFS) and/or blocked regions. The efficiency of the holecutting algorithm is boosted with search algorithms based on the state-of-the-art Alternating Digital Tree (ADT) data structures. The automatic hole-cutting algorithm has been used to produce data for both the conservative and the traditional Chimera methods. The automated nature of the hole-cutting algorithm is ideally suited for handling multiple moving body problems. Several cases, both steady and unsteady, are used to demonstrate the effectiveness of the methodology.