Add surface_distance module: 3D terrain distance via multi-source Dijkstra#918

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brendancol merged 2 commits intomasterfrom

feature/surface-distance

Feb 28, 2026

Commits on Feb 28, 2026

Add surface_distance module: 3D terrain distance via multi-source Dijkstra
brendancol
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Add surface distance functions to README proximity table
brendancol
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