Calculate a service catchment using network distance logic rather than straight-line buffers.
A public health team needs residents within a 10-minute walk of cooling centers, but the study area has rivers, highways, and disconnected pedestrian paths. Network catchment method: define graph, set edge cost, snap origins, solve reachable network, reconcile with population units. A circular buffer treats blocked crossings and connected streets as if they were equally reachable. Graph Build or load a pedestrian network where nodes are intersections and edges are walkable segments. The graph is the access model. If a path is not in the graph or is marked non-walkable, the solver will not pretend people can use it. Cost…
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