{"name":"Section A-A'","place":"The Lower Lea, from Fish Island (Hackney Wick) to Stratford","line":{"crs":"EPSG:27700","a":[536795,184459],"b":[538219,184459],"lengthM":1424,"stepM":2},"model":{"y":421.66,"x0":-0.62,"x1":1000.08},"sources":{"ground":{"credit":"Environment Agency LIDAR Composite DTM 2022, 1 m","licence":"OGL-UK-3.0","evidence":"sourced"},"surface":{"credit":"Environment Agency LIDAR Composite First Return DSM 2022, 1 m, minus the DTM","licence":"OGL-UK-3.0","evidence":"sourced"},"vegetation":{"credit":"Tree canopy derived from EA LIDAR DSM and DTM 2022, OpenStreetMap footprints and Copernicus Sentinel-2 L2A NDVI (25 August 2025)","licence":"OGL-UK-3.0, ODbL-1.0, Copernicus open licence","evidence":"derived"},"features":{"credit":"\u00a9 OpenStreetMap contributors (2026-09-22)","licence":"ODbL-1.0","evidence":"sourced"},"flood":{"credit":"\u00a9 Environment Agency copyright and/or database right 2025. All rights reserved.","licence":"OGL-UK-3.0","evidence":"modelled","caveat":"Likelihood extents, not depths and not an event."}},"attribution":"\u00a9 Environment Agency copyright and/or database right 2022. All rights 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share: DSM minus DTM at least 2.5 m, outside OpenStreetMap building footprints grown 2 m, with Sentinel-2 NDVI at least 0.3 (25 August 2025); the leaf-off VOM 2020 undercounts it. Built volume: DSM minus DTM where at least 2.5 m and not vegetation, per square metre of ground. Both read over 100 m either side of the line.","stretches":[{"from":0,"to":50,"canopy":0.109,"builtVolumeM3PerM2":1.3,"builtShare":0.158},{"from":50,"to":100,"canopy":0.072,"builtVolumeM3PerM2":0.59,"builtShare":0.138},{"from":100,"to":150,"canopy":0.025,"builtVolumeM3PerM2":2.97,"builtShare":0.232},{"from":150,"to":200,"canopy":0.024,"builtVolumeM3PerM2":4.19,"builtShare":0.341},{"from":200,"to":250,"canopy":0.01,"builtVolumeM3PerM2":5.14,"builtShare":0.452},{"from":250,"to":300,"canopy":0.002,"builtVolumeM3PerM2":3.8,"builtShare":0.431},{"from":300,"to":350,"canopy":0.0,"builtVolumeM3PerM2":1.53,"builtShare":0.264},{"from":350,"to":400,"canopy":0.0,"builtVolumeM3PerM2":2.63,"builtShare":0.41},{"from":400,"to":450,"canopy":0.0,"builtVolumeM3PerM2":6.01,"builtShare":0.511},{"from":450,"to":500,"canopy":0.007,"builtVolumeM3PerM2":3.08,"builtShare":0.37},{"from":500,"to":550,"canopy":0.019,"builtVolumeM3PerM2":1.77,"builtShare":0.125},{"from":550,"to":600,"canopy":0.01,"builtVolumeM3PerM2":0.24,"builtShare":0.042},{"from":600,"to":650,"canopy":0.006,"builtVolumeM3PerM2":0.0,"builtShare":0.001},{"from":650,"to":700,"canopy":0.009,"builtVolumeM3PerM2":0.35,"builtShare":0.113},{"from":700,"to":750,"canopy":0.023,"builtVolumeM3PerM2":0.05,"builtShare":0.01},{"from":750,"to":800,"canopy":0.011,"builtVolumeM3PerM2":0.75,"builtShare":0.11},{"from":800,"to":850,"canopy":0.063,"builtVolumeM3PerM2":0.18,"builtShare":0.04},{"from":850,"to":900,"canopy":0.045,"builtVolumeM3PerM2":0.54,"builtShare":0.104},{"from":900,"to":950,"canopy":0.038,"builtVolumeM3PerM2":0.47,"builtShare":0.065},{"from":950,"to":1000,"canopy":0.023,"builtVolumeM3PerM2":0.31,"builtShare":0.058},{"from":1000,"to":1050,"canopy":0.009,"builtVolumeM3PerM2":0.49,"builtShare":0.055},{"from":1050,"to":1100,"canopy":0.003,"builtVolumeM3PerM2":5.97,"builtShare":0.289},{"from":1100,"to":1150,"canopy":0.004,"builtVolumeM3PerM2":4.64,"builtShare":0.268},{"from":1150,"to":1200,"canopy":0.045,"builtVolumeM3PerM2":8.64,"builtShare":0.275},{"from":1200,"to":1250,"canopy":0.037,"builtVolumeM3PerM2":7.79,"builtShare":0.307},{"from":1250,"to":1300,"canopy":0.083,"builtVolumeM3PerM2":3.08,"builtShare":0.2},{"from":1300,"to":1350,"canopy":0.0,"builtVolumeM3PerM2":22.99,"builtShare":0.363},{"from":1350,"to":1400,"canopy":0.0,"builtVolumeM3PerM2":26.93,"builtShare":0.496},{"from":1400,"to":1424,"canopy":0.001,"builtVolumeM3PerM2":13.51,"builtShare":0.526}]},"retrieved":"2026-09-25"}