The goal of this dissertation is to provide a rule-governed, linguistic model of location morphology in American Sign Language (ASL). The dissertation is arranged by first establishing the theoretical background (Chapter 1), then the proposed geometry based model of location is explained (Chapters 2-4), and then finally the proposed model is applied in detail to ASL (Chapters 5 and 6). The main hypothesis is that ASL morphology is agglutinative, and that this has been obscured by misunderstandings about the nature of location in ASL.