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"end_distance_m": 919.0, "midpoint_distance_m": 917.5, "start_elevation_m": 177.4407577924892, "end_elevation_m": 178.1133855762485, "start_xy": [ 512547.7577924526, 6313941.795791515 ], "end_xy": [ 512548.15960745094, 6313944.768760521 ] } }, "diagnostic_note": "Windows <=3 m are at raster-noise scale (1-sigma raster noise alone is roughly +/-7 pp at 2 m and +/-5 pp at 3 m on a 1 m DTM). 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