Network & Accessibility Analysis

Purpose: replace as-the-crow-flies guesswork with network-true travel costs, at the right scale and with honest assumptions about speeds and modes. First decision on every task: Euclidean distance is only acceptable as a declared approximation — flag it whenever you see it standing in for access.

Tool selection by scale

NetworkX chokes on metro-scale many-to-many — don't loop shortest_path over thousands of origins; switch tools instead.