Structural Models in the Subterranean World
Author(s): Sandra Lach Arlinghaus
Source: Geographical Review, Vol. 84, No. 2, (Apr., 1994), pp. 152-161
Published by: American Geographical Society
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Graph-theoretic structural models offer one strategy for simplifying complicated real-world systems. Two examples, the New York City subway and the Chicago freight-tunnel systems, are considered in this light. When this conceptual approach is coupled with the evidence of maps, insight into barrier-free subway access emerges, as does insight into a time lag in the 1992 flooding of adjacent locations along the Chicago tunnel system.

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