A geometric model is, by definition, an informationally complete representation of a solid object. Such models are processed for various purposes: pictorial display, finite element mesh generation, geometric properties, etc. The ability to define and process representations of solid objects has enormous potential for engineers, provided that software is available which is capable of making routine decisions on such matters as how best to display the model. This paper concentrates on one set of decisions concerning the display and addresses the question of which views of the object are appropriate for a user seeking precise geometric information.
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