{"boundary":{"name":"England — ONS Countries December2025 BGC","countryCode":"E92000001","sourceUrl":"https://www.arcgis.com/home/item.html?id=c8bea35f51054f0c95aa876f66fe027c","vintage":"December2025; publishedMay2026","licence":"Open Government Licence v3.0","licenceUrl":"https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/","attribution":"Source: Office for National Statistics licensed under the Open Government Licence v.3.0. Contains OS data © Crown copyright and database right 2025.","generalisation":"Official BGC20m, clippedto MeanHighWater; original BGC nodes allretained. No further simplification.","borderExclusionMetres":75,"limitations":"Cartographic administrativecoverage only, not apropertysurvey. Pointinclusion nearborder/shore remainsuncertain; use75m exclusion. ExcludesWales/Scotland/NI/ChannelIslands/IsleofMan; includesEnglandislands."},"connectivity":{"scope":"England; 75 m boundary exclusion","version":"ofcom-fixed-residential-202601-r1","broadband":{"source":{"name":"Ofcom — Connected Nations Spring 2026","url":"https://www.ofcom.org.uk/phones-and-broadband/coverage-and-speeds/connected-nations-update-spring-2026","date":"2026-01","dateLabel":"January 2026","importedAt":"2026-11-07","attribution":"Source: Ofcom, Connected Nations Spring 2026. Contains public sector information licensed under the Open Government Licence v3.0.","licence":"Open Government Licence v3.0","licenceUrl":"https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/"},"referenceMonth":"2026-01","population":"residential premises","grain":"unit postcode","postcodeRows":1606190,"includesOutsideBoundaryRows":true,"geometryGateRequired":true,"sourceArchive":{"bytes":33797696,"name":"202601_fixed_broadband_coverage_and_full_fibre_take-up-r1.zip","sha256":"0ddc33723e345d86ba25d7528d272f6fe12aef5d21d2e3adefdcaa53711c76f3"},"sourceArchiveUrl":"https://www.ofcom.org.uk/siteassets/resources/documents/research-and-data/multi-sector/infrastructure-research/connected-nations-spring-2026/202601_fixed_broadband_coverage_and_full_fibre_take-up-r1.zip?v=422620","files":"/connectivity-england-v1/{outward-postcode}.json.gz","values":["sfbb30_percent","ufbb100_percent","ufbb300_percent","gigabit_percent"],"limitations":["Postcode percentages do not establish service availability, performance, capacity or orderability at an individual building or flat.","No full-fibre postcode percentage or provider-specific exact-address availability is supplied.","Independent percentage columns are preserved without imputation or deriving one threshold from another.","No postcode denominators are available; do not average postcode percentages into regional totals.","All source postcode areas are retained, including outside England. Runtime England geometry gating is mandatory. Unknown or absent postcode means unavailable, never zero."]},"mobile":{"status":"requires_licensed_api","reason":"Automated predictions need authorised point-API access and suitable commercial, presentation and retention permissions. Public aggregate data does not establish coverage at an apartment.","externalChecks":[{"name":"Ofcom Map Your Mobile","url":"https://www.ofcom.org.uk/mobile-coverage-checker"}]}},"noise":{"scope":"England source-connected historical road, railway and 15 required airport rasters; not every address has a published value and not all airfields are mapped. Scotland, Wales and NI are excluded by the application boundary.","version":"england-defra-r4-v1","source":{"name":"Defra — England road/rail noise Round 4","sourceUrl":"https://www.gov.uk/government/publications/strategic-noise-mapping-2022","date":"2021 conditions; 2022 analysis","attribution":"© Department for Environment, Food & Rural Affairs copyright and/or database right 2023. All rights reserved.","licence":"Open Government Licence v3.0","licenceUrl":"https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/"},"airportSources":{"Birmingham":{"name":"Defra — Birmingham airport Round 4","sourceUrl":"https://www.data.gov.uk/dataset/f962e5e8-8937-43f4-b692-4f030301571c/airport-noise-all-metrics-england-round-4","date":"Round 4 / 2022 analysis; operations year is airport-specific, not inferred from publication date","attribution":"© Department for Environment, Food & Rural Affairs copyright and/or database right 2024. All rights reserved.","licence":"Open Government Licence v3.0","licenceUrl":"https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/"},"Bournemouth":{"name":"Defra — Bournemouth airport Round 4","sourceUrl":"https://www.data.gov.uk/dataset/f962e5e8-8937-43f4-b692-4f030301571c/airport-noise-all-metrics-england-round-4","date":"Round 4 / 2022 analysis; operations year is airport-specific, not inferred from publication date","attribution":"© Department for Environment, Food & Rural Affairs copyright and/or database right 2024. All rights reserved.","licence":"Open Government Licence v3.0","licenceUrl":"https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/"},"Bristol":{"name":"Defra — Bristol airport Round 4","sourceUrl":"https://www.data.gov.uk/dataset/f962e5e8-8937-43f4-b692-4f030301571c/airport-noise-all-metrics-england-round-4","date":"Round 4 / 2022 analysis; operations year is airport-specific, not inferred from publication date","attribution":"© Department for Environment, Food & Rural Affairs copyright and/or database right 2024. All rights reserved.","licence":"Open Government Licence v3.0","licenceUrl":"https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/"},"EastMidlands":{"name":"Defra — East Midlands airport Round 4","sourceUrl":"https://www.data.gov.uk/dataset/f962e5e8-8937-43f4-b692-4f030301571c/airport-noise-all-metrics-england-round-4","date":"Round 4 / 2022 analysis; operations year is airport-specific, not inferred from publication date","attribution":"© Department for Environment, Food & Rural Affairs copyright and/or database right 2024. All rights reserved.","licence":"Open Government Licence v3.0","licenceUrl":"https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/"},"Gatwick":{"name":"Defra — Gatwick airport Round 4","sourceUrl":"https://www.data.gov.uk/dataset/f962e5e8-8937-43f4-b692-4f030301571c/airport-noise-all-metrics-england-round-4","date":"Round 4 / 2022 analysis; operations year is airport-specific, not inferred from publication date","attribution":"© Department for Environment, Food & Rural Affairs copyright and/or database right 2024. All rights reserved.","licence":"Open Government Licence v3.0","licenceUrl":"https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/"},"Heathrow":{"name":"Defra — Heathrow airport Round 4","sourceUrl":"https://www.data.gov.uk/dataset/f962e5e8-8937-43f4-b692-4f030301571c/airport-noise-all-metrics-england-round-4","date":"Round 4 / 2022 analysis; operations year is airport-specific, not inferred from publication date","attribution":"© Department for Environment, Food & Rural Affairs copyright and/or database right 2024. All rights reserved.","licence":"Open Government Licence v3.0","licenceUrl":"https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/"},"LeedsBradford":{"name":"Defra — Leeds Bradford airport Round 4","sourceUrl":"https://www.data.gov.uk/dataset/f962e5e8-8937-43f4-b692-4f030301571c/airport-noise-all-metrics-england-round-4","date":"Round 4 / 2022 analysis; operations year is airport-specific, not inferred from publication date","attribution":"© Department for Environment, Food & Rural Affairs copyright and/or database right 2024. All rights reserved.","licence":"Open Government Licence v3.0","licenceUrl":"https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/"},"Liverpool":{"name":"Defra — Liverpool airport Round 4","sourceUrl":"https://www.data.gov.uk/dataset/f962e5e8-8937-43f4-b692-4f030301571c/airport-noise-all-metrics-england-round-4","date":"Round 4 / 2022 analysis; operations year is airport-specific, not inferred from publication date","attribution":"© Department for Environment, Food & Rural Affairs copyright and/or database right 2024. All rights reserved.","licence":"Open Government Licence v3.0","licenceUrl":"https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/"},"LondonCity":{"name":"Defra — London City airport Round 4","sourceUrl":"https://www.data.gov.uk/dataset/f962e5e8-8937-43f4-b692-4f030301571c/airport-noise-all-metrics-england-round-4","date":"Round 4 / 2022 analysis; operations year is airport-specific, not inferred from publication date","attribution":"© Department for Environment, Food & Rural Affairs copyright and/or database right 2024. All rights reserved.","licence":"Open Government Licence v3.0","licenceUrl":"https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/"},"Luton":{"name":"Defra — Luton airport Round 4","sourceUrl":"https://www.data.gov.uk/dataset/f962e5e8-8937-43f4-b692-4f030301571c/airport-noise-all-metrics-england-round-4","date":"Round 4 / 2022 analysis; operations year is airport-specific, not inferred from publication date","attribution":"© Department for Environment, Food & Rural Affairs copyright and/or database right 2024. All rights reserved.","licence":"Open Government Licence v3.0","licenceUrl":"https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/"},"Manchester":{"name":"Defra — Manchester airport Round 4","sourceUrl":"https://www.data.gov.uk/dataset/f962e5e8-8937-43f4-b692-4f030301571c/airport-noise-all-metrics-england-round-4","date":"Round 4 / 2022 analysis; operations year is airport-specific, not inferred from publication date","attribution":"© Department for Environment, Food & Rural Affairs copyright and/or database right 2024. All rights reserved.","licence":"Open Government Licence v3.0","licenceUrl":"https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/"},"Newcastle":{"name":"Defra — Newcastle airport Round 4","sourceUrl":"https://www.data.gov.uk/dataset/f962e5e8-8937-43f4-b692-4f030301571c/airport-noise-all-metrics-england-round-4","date":"Round 4 / 2022 analysis; operations year is airport-specific, not inferred from publication date","attribution":"© Department for Environment, Food & Rural Affairs copyright and/or database right 2024. All rights reserved.","licence":"Open Government Licence v3.0","licenceUrl":"https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/"},"Southampton":{"name":"Defra — Southampton airport Round 4","sourceUrl":"https://www.data.gov.uk/dataset/f962e5e8-8937-43f4-b692-4f030301571c/airport-noise-all-metrics-england-round-4","date":"Round 4 / 2022 analysis; operations year is airport-specific, not inferred from publication date","attribution":"© Department for Environment, Food & Rural Affairs copyright and/or database right 2024. All rights reserved.","licence":"Open Government Licence v3.0","licenceUrl":"https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/"},"Southend":{"name":"Defra — Southend airport Round 4","sourceUrl":"https://www.data.gov.uk/dataset/f962e5e8-8937-43f4-b692-4f030301571c/airport-noise-all-metrics-england-round-4","date":"Round 4 / 2022 analysis; operations year is airport-specific, not inferred from publication date","attribution":"© Department for Environment, Food & Rural Affairs copyright and/or database right 2024. All rights reserved.","licence":"Open Government Licence v3.0","licenceUrl":"https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/"},"Stansted":{"name":"Defra — Stansted airport Round 4","sourceUrl":"https://www.data.gov.uk/dataset/f962e5e8-8937-43f4-b692-4f030301571c/airport-noise-all-metrics-england-round-4","date":"Round 4 / 2022 analysis; operations year is airport-specific, not inferred from publication date","attribution":"© Department for Environment, Food & Rural Affairs copyright and/or database right 2024. All rights reserved.","licence":"Open Government Licence v3.0","licenceUrl":"https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/"}},"registry":{"id":"defra-england-round4-reviewed-2026-11-07","retrievedAt":"2026-11-07","scope":"England source-connected historical road, railway and 15 required airport rasters; not every address has a published value and not all airfields are mapped. 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All rights reserved.","roadsAndRailways":{"road":{"wms":"https://environment.data.gov.uk/spatialdata/road-noise-all-metrics-england-round-4/wms","wcs":"https://environment.data.gov.uk/spatialdata/road-noise-all-metrics-england-round-4/wcs","metadataId":"562c9d56-7c2d-4d42-83bb-578d6e97a517","metrics":{"Lden":{"layer":"Road_Noise_Lden_England_Round_4_All","title":"Road_Noise_Lden_England_Round_4_All","queryable":"1","bounds":{"CRS:84":[-7.054196490139879,49.8639822049614,2.077266260875042,55.810732456002505],"EPSG:27700":[82645,5335,655995,657605],"EPSG:4326":[49.86397680576314,-7.054138824607455,55.8107295207341,2.0793461558097457],"EPSG:4258":[49.86397680576314,-7.054138824607455,55.8107295207341,2.0793461558097457],"EPSG:3857":[-785263.1419403632,6422752.259645056,231471.75524769176,7520829.153393913],"EPSG:900913":[-785263.1419403632,6422752.259645056,231471.75524769176,7520829.153393913]}},"Lnight":{"layer":"Road_Noise_Lnight_England_Round_4_All","title":"Road_Noise_Lnight_England_Round_4_All","queryable":"1","bounds":{"CRS:84":[-7.054196490139879,49.8639822049614,2.077266260875042,55.810732456002505],"EPSG:27700":[82645,5335,655995,657605],"EPSG:4326":[49.86397680576314,-7.054138824607455,55.8107295207341,2.0793461558097457],"EPSG:4258":[49.86397680576314,-7.054138824607455,55.8107295207341,2.0793461558097457],"EPSG:3857":[-785263.1419403632,6422752.259645056,231471.75524769176,7520829.153393913],"EPSG:900913":[-785263.1419403632,6422752.259645056,231471.75524769176,7520829.153393913]}}},"conditionsYear":2021,"analysisYear":2022},"rail":{"wms":"https://environment.data.gov.uk/spatialdata/noise-data/wms","wcs":"https://environment.data.gov.uk/spatialdata/noise-data/wcs","metadataId":"3fb3c2d7-292c-4e0a-bd5b-d8e4e1fe2947","metrics":{"Lden":{"layer":"Rail_Noise_Lden_England_Round_4_All","title":"Rail_Noise_Lden_England_Round_4_All","queryable":"1","bounds":{"CRS:84":[-7.054196490139879,49.8639822049614,2.077266260875042,55.810732456002505],"EPSG:27700":[82645,5335,655995,657605],"EPSG:4326":[49.86397680576314,-7.054138824607455,55.8107295207341,2.0793461558097457],"EPSG:4258":[49.86397680576314,-7.054138824607455,55.8107295207341,2.0793461558097457],"EPSG:3857":[-785263.1419403632,6422752.259645056,231471.75524769176,7520829.153393913],"EPSG:900913":[-785263.1419403632,6422752.259645056,231471.75524769176,7520829.153393913]}},"Lnight":{"layer":"Rail_Noise_Lnight_England_Round_4_All","title":"Rail_Noise_Lnight_England_Round_4_All","queryable":"1","bounds":{"CRS:84":[-7.054196490139879,49.8639822049614,2.077266260875042,55.810732456002505],"EPSG:27700":[82645,5335,655995,657605],"EPSG:4326":[49.86397680576314,-7.054138824607455,55.8107295207341,2.0793461558097457],"EPSG:4258":[49.86397680576314,-7.054138824607455,55.8107295207341,2.0793461558097457],"EPSG:3857":[-785263.1419403632,6422752.259645056,231471.75524769176,7520829.153393913],"EPSG:900913":[-785263.1419403632,6422752.259645056,231471.75524769176,7520829.153393913]}}},"conditionsYear":2021,"analysisYear":2022}},"airport":{"catalogueUrl":"https://www.data.gov.uk/dataset/f962e5e8-8937-43f4-b692-4f030301571c/airport-noise-all-metrics-england-round-4","wms":"https://environment.data.gov.uk/spatialdata/airport-noise-all-metrics-england-round-4/wms","wcs":"https://environment.data.gov.uk/spatialdata/airport-noise-all-metrics-england-round-4/wcs","metadataId":"dac9cba4-abe7-43bd-b8e9-8a83da52edd8","count":15,"airports":{"Birmingham":{"name":"Birmingham","metrics":{"Lden":{"layer":"Airport_Noise_Birmingham_Lden","title":"Airport_Noise_Birmingham_Lden","queryable":"1","bounds":{"CRS:84":[-1.8141671726842676,52.38343326244252,-1.6693479512302234,52.515628375228],"EPSG:27700":[412745,276205,422535,290875],"EPSG:4326":[52.38343326244252,-1.8141671726842676,52.515628375228,-1.6693479512302234],"EPSG:4258":[52.38343326244252,-1.8141671726842676,52.515628375228,-1.6693479512302234],"EPSG:3857":[-201952.16587708547,6869754.26022462,-185830.96388774295,6893900.072011204],"EPSG:900913":[-201952.16587708547,6869754.26022462,-185830.96388774295,6893900.072011204]},"coverageId":"dac9cba4-abe7-43bd-b8e9-8a83da52edd8__Airport_Noise_Birmingham_Lden"},"Lnight":{"layer":"Airport_Noise_Birmingham_Lnight","title":"Airport_Noise_Birmingham_Lnight","queryable":"1","bounds":{"CRS:84":[-1.8141671726842676,52.38343326244252,-1.6693479512302234,52.515628375228],"EPSG:27700":[412745,276205,422535,290875],"EPSG:4326":[52.38343326244252,-1.8141671726842676,52.515628375228,-1.6693479512302234],"EPSG:4258":[52.38343326244252,-1.8141671726842676,52.515628375228,-1.6693479512302234],"EPSG:3857":[-201952.16587708547,6869754.26022462,-185830.96388774295,6893900.072011204],"EPSG:900913":[-201952.16587708547,6869754.26022462,-185830.96388774295,6893900.072011204]},"coverageId":"dac9cba4-abe7-43bd-b8e9-8a83da52edd8__Airport_Noise_Birmingham_Lnight"}},"analysisYear":2022,"conditionsYear":null,"conditionsYearNote":"Heathrow annex explicitly identifies 2021; 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Publication/update dates are not conditions years."},"Southampton":{"name":"Southampton","metrics":{"Lden":{"layer":"Airport_Noise_Southampton_Lden","title":"Airport_Noise_Southampton_Lden","queryable":"1","bounds":{"CRS:84":[-1.3772827036421493,50.922718278955266,-1.3374326585911194,50.98407805506278],"EPSG:27700":[443865,113905,446605,120705],"EPSG:4326":[50.922718278955266,-1.3772827036421493,50.98407805506278,-1.3374326585911194],"EPSG:4258":[50.922718278955266,-1.3772827036421493,50.98407805506278,-1.3374326585911194],"EPSG:3857":[-153318.4092478272,6607634.8492562305,-148882.3225246575,6618477.798128835],"EPSG:900913":[-153318.4092478272,6607634.8492562305,-148882.3225246575,6618477.798128835]},"coverageId":"dac9cba4-abe7-43bd-b8e9-8a83da52edd8__Airport_Noise_Southampton_Lden"},"Lnight":{"layer":"Airport_Noise_Southampton_Lnight","title":"Airport_Noise_Southampton_Lnight","queryable":"1","bounds":{"CRS:84":[-1.3772827036421493,50.922718278955266,-1.3374326585911194,50.98407805506278],"EPSG:27700":[443865,113905,446605,120705],"EPSG:4326":[50.922718278955266,-1.3772827036421493,50.98407805506278,-1.3374326585911194],"EPSG:4258":[50.922718278955266,-1.3772827036421493,50.98407805506278,-1.3374326585911194],"EPSG:3857":[-153318.4092478272,6607634.8492562305,-148882.3225246575,6618477.798128835],"EPSG:900913":[-153318.4092478272,6607634.8492562305,-148882.3225246575,6618477.798128835]},"coverageId":"dac9cba4-abe7-43bd-b8e9-8a83da52edd8__Airport_Noise_Southampton_Lnight"}},"analysisYear":2022,"conditionsYear":null,"conditionsYearNote":"Heathrow annex explicitly identifies 2021; other airport operations years are not specified by this inspected national catalogue. Publication/update dates are not conditions years."},"Southend":{"name":"Southend","metrics":{"Lden":{"layer":"Airport_Noise_Southend_Lden","title":"Airport_Noise_Southend_Lden","queryable":"1","bounds":{"CRS:84":[0.5774832167781978,51.497860173384865,0.8088136168423081,51.64210515404714],"EPSG:27700":[578985,181375,594465,196865],"EPSG:4326":[51.497860173384865,0.5774832167781978,51.64210515404714,0.8088136168423081],"EPSG:4258":[51.497860173384865,0.5774832167781978,51.64210515404714,0.8088136168423081],"EPSG:3857":[64285.137633410595,6709836.443515021,90036.71997355162,6735670.377683942],"EPSG:900913":[64285.137633410595,6709836.443515021,90036.71997355162,6735670.377683942]},"coverageId":"dac9cba4-abe7-43bd-b8e9-8a83da52edd8__Airport_Noise_Southend_Lden"},"Lnight":{"layer":"Airport_Noise_Southend_Lnight","title":"Airport_Noise_Southend_Lnight","queryable":"1","bounds":{"CRS:84":[0.5774832167781978,51.497860173384865,0.8088136168423081,51.64210515404714],"EPSG:27700":[578985,181375,594465,196865],"EPSG:4326":[51.497860173384865,0.5774832167781978,51.64210515404714,0.8088136168423081],"EPSG:4258":[51.497860173384865,0.5774832167781978,51.64210515404714,0.8088136168423081],"EPSG:3857":[64285.137633410595,6709836.443515021,90036.71997355162,6735670.377683942],"EPSG:900913":[64285.137633410595,6709836.443515021,90036.71997355162,6735670.377683942]},"coverageId":"dac9cba4-abe7-43bd-b8e9-8a83da52edd8__Airport_Noise_Southend_Lnight"}},"analysisYear":2022,"conditionsYear":null,"conditionsYearNote":"Heathrow annex explicitly identifies 2021; other airport operations years are not specified by this inspected national catalogue. Publication/update dates are not conditions years."},"Stansted":{"name":"Stansted","metrics":{"Lden":{"layer":"Airport_Noise_Stansted_Lden","title":"Airport_Noise_Stansted_Lden","queryable":"1","bounds":{"CRS:84":[0.10571253169328691,51.79437157833586,0.38168763426256463,51.98794110583645],"EPSG:27700":[545295,213295,563655,234275],"EPSG:4326":[51.79437157833586,0.10571253169328691,51.98794110583645,0.38168763426256463],"EPSG:4258":[51.79437157833586,0.10571253169328691,51.98794110583645,0.38168763426256463],"EPSG:3857":[11767.865198564494,6763030.253656873,42489.27308819794,6797945.345289535],"EPSG:900913":[11767.865198564494,6763030.253656873,42489.27308819794,6797945.345289535]},"coverageId":"dac9cba4-abe7-43bd-b8e9-8a83da52edd8__Airport_Noise_Stansted_Lden"},"Lnight":{"layer":"Airport_Noise_Stansted_Lnight","title":"Airport_Noise_Stansted_Lnight","queryable":"1","bounds":{"CRS:84":[0.1057125316932869,51.79437157833586,0.3816876342625646,51.98794110583645],"EPSG:27700":[545295,213295,563655,234275],"EPSG:4326":[51.79437157833586,0.10571253169328691,51.98794110583645,0.38168763426256463],"EPSG:4258":[51.79437157833586,0.10571253169328691,51.98794110583645,0.38168763426256463],"EPSG:3857":[11767.865198564494,6763030.253656873,42489.27308819794,6797945.345289535],"EPSG:900913":[11767.865198564494,6763030.253656873,42489.27308819794,6797945.345289535]},"coverageId":"dac9cba4-abe7-43bd-b8e9-8a83da52edd8__Airport_Noise_Stansted_Lnight"}},"analysisYear":2022,"conditionsYear":null,"conditionsYearNote":"Heathrow annex explicitly identifies 2021; other airport operations years are not specified by this inspected national catalogue. Publication/update dates are not conditions years."}},"doNotUse":["Airport_Noise_ALL_Lden","Airport_Noise_ALL_Lnight"],"doNotUseReason":"The individual airports must remain separate; using ALL or adding components would hide source identity or change the published quantity.","cutoffCaveat":"National catalogue lowest cutoff 40 dB Lden and 35 dB Lnight; airport actual thresholds vary with competent-authority input."},"raster":{"crs":"EPSG:27700","metresPerPixel":10,"receptorHeightMetres":4,"gridEdgesModulo10":5,"sampleType":"Float32","roadRailNoData":-96,"airportNoData":-3.4028234663852886e+38,"display":"Continuous model dB(A), display rounded to integer; not a five-decibel band.","metrics":{"Lden":{"dayHours":"07:00–19:00","eveningHours":"19:00–23:00","nightHours":"23:00–07:00","penaltiesDb":{"evening":5,"night":10},"publishedMinimum":40},"Lnight":{"hours":"23:00–07:00","publishedMinimum":35}}},"capabilitiesHashes":{"road":"ed483b029989b405768a4dcc68b49fd3aeee248d7be3d7f7a1fc7ab267efc5e7","rail":"7c1ab5cbcf955b8b628340ce985131b123a8a5b72d707bbb4b0fbfbd1862763a","airport":"0e22493e0c053907377df1d366b0af1ec73497aeafa60bf773a4ae68d7b134b8"},"limits":["Annual historical outdoor transport model, not current traffic, individual events, indoor sound, floor/window acoustics, neighbours or nightlife.","Model took account of all public roads and railways including light rail in England; published values still have lower thresholds and missing cells.","NoData, 0/null, missing raster and outside airport extent never mean quietness or no aircraft noise.","There are 15 individual airports in the inspected service; smaller/exempt airfields and newer changes are not implied to be mapped.","Never sum road, rail or different airports; never relabel LAeq16hr/Lday/Leve as Lden or Lnight.","Do not use the old London OSTN15 crop outside its bounds. Native airport gating/WCS sampling requires the reviewed full-England transform; CRS:84 WMS extents can be used conservatively for early gating."]},"limitations":["Historical annual outdoor model at 4 m above ground on a 10 m grid; not current traffic, individual peaks or sound inside this flat.","Lnight is 23:00–07:00. Lden uses day 07:00–19:00, evening 19:00–23:00 and night 23:00–07:00.","Road, railway and individual airport rasters are kept separate and never summed. Only published required-airport contours are included; other airfields, neighbours and nightlife are not covered.","NoData, zero, no contour and failures remain unknown, never evidence of quietness. No nearest-noise substitute or ALL-airport mosaic is used."],"method":"England road/rail WMS and bounded native 100 × 100 m airport WCS subsets. Prepared London airport cells are reused where available. Source failures remain unknown."},"supermarkets":{"city":"england","countryCode":"GB","scope":"All shop=supermarket tagged nodes, ways and relations in the pinned public Geofabrik England PBF, not a census of physical shops. Application addresses must still be gated to England. A nearer shop outside the extract can be omitted near source edges.","source":"OpenStreetMap contributors via Geofabrik England extract","sourceUrl":"https://download.geofabrik.de/europe/united-kingdom/england-261105.osm.pbf","sourceDate":"2026-11-05T21:23:02Z","importedAt":"2026-11-07T18:24:43.608890+00:00","licence":"ODbL-1.0","licenceUrl":"https://www.openstreetmap.org/copyright","attribution":"© OpenStreetMap contributors; extract supplied by Geofabrik GmbH","version":"england-osm-geofabrik-2026-11-05-v1","records":8568,"sourceObjectTotal":8577,"completeSourceScan":true,"unresolvedGeometryRecords":0,"method":"Versioned offline OpenStreetMap supermarket extract. Candidate selection uses all source cells intersecting a conservative 3 km search box, then filters by actual distance. No live Overpass request.","downloadUrl":"/api/datasets/england/supermarkets-download","emptyPolicy":"Only an entry with state=complete_empty is a known empty source cell. Edge/outside/missing/corrupt are not complete empty data. No mapped point is not proof of no supermarket.","pointMethods":{"mapped_node":"Original source coordinate.","polygon_centroid":"Derived 2D centroid of the source polygon with interior holes; retained only when inside source geometry.","polygon_interior_point":"Source-geometry point-on-surface when its centroid lies outside. No point is a surveyed entrance."},"stores":[]},"sunlight":"conditional_after_window_setup; usable LiDAR/OSM required","summerComfort":"user_confirmed_building_features","mobile":"authorised_API_pending"}