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"end_distance_m": 275.0, "midpoint_distance_m": 273.5, "start_elevation_m": 218.46386149459835, "end_elevation_m": 219.12792744955598, "start_xy": [ 900084.1145128835, 6254504.44770074 ], "end_xy": [ 900084.6256580629, 6254507.401686085 ] } }, "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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