pathfinding: validate inputs and cap waypoints#1440
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brendancol merged 1 commit intomainfrom May 4, 2026
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a_star_search and multi_stop_search previously checked only surface.ndim != 2. Non-DataArray surfaces, complex dtypes, and non-DataArray friction failed inside numba with confusing errors. multi_stop_search did not bound len(waypoints). The optimize_order path is O(N^3) so unbounded N is a CPU DoS. - Add _validate_raster on surface and (when supplied) friction. - Add _MAX_WAYPOINTS = 1000 cap with a clear ValueError message. 5 new tests in TestPathfindingInputValidation.
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May 3, 2026
Records the 11 PRs filed this round: - hydro: HIGH flow_direction_mfd memory guard (PR #1424); MEDIUM bundles for _validate_raster on secondary args (#1426), scalar param validation (#1428), and cellsize validation (#1430). - reproject: MEDIUM bundles for _validate_raster (#1432), grid/bounds/ precision validation (#1434), and NaN/Inf rejection (#1436). - flood: mannings_n DataArray validation (#1438). - pathfinding: waypoint cap + _validate_raster (#1440). - polygonize: _validate_raster (#1442). - terrain: scratch memory guard + scalar validation (#1444).
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Closes #1439.
Summary
a_star_searchandmulti_stop_searchnow call_validate_rasteronsurfaceand onfriction(when supplied).multi_stop_searchenforces_MAX_WAYPOINTS = 1000. The optimize_order path is O(N^3) so unbounded N is a CPU DoS.Test plan
TestPathfindingInputValidation.pytest xrspatial/tests/test_pathfinding.py— 51 passed (46 existing + 5 new).