{ "id": "methaneset-emit", "dataset_version": "1.0.0", "description": "methaneset-emit provides analysis-ready EMIT hyperspectral scenes for methane plume detection and quantification. 721 granules (700 with plumes + 21 verified plume-free), selected from the granules where the UNEP-IMEO and CarbonMapper catalogs BOTH report a plume (consensus), with 0% onboard nodata and complete IMEO flux quantification, balanced across flux class (all 812 weak plumes under 1,000 kg/h retained), year, region and sector. Each sample carries 10 sensor-geometry layers with 128x128 internal tiling: the full 285-band L1B radiance cube, per-pixel lat/lon, the GLT orthorectification lookup, Copernicus GLO-30 elevation, an ERA5-Land 10 m wind field (u/v, time-interpolated to the acquisition minute), three matched-filter retrievals (mf, rmf, mag1c), and dual instance-coded plume masks from the IMEO portal and CarbonMapper analysts, where a matched pair shares the same code in both files. A leakage-free train/val/test split grouped by emitter is proposed; all metadata is queryable in level0.parquet without opening a raster.", "licenses": [ "cc-by-4.0" ], "providers": [ { "name": "NASA JPL", "roles": [ "producer" ], "url": null, "links": null }, { "name": "UNEP IMEO", "roles": [ "producer" ], "url": null, "links": null }, { "name": "Carbon Mapper", "roles": [ "producer" ], "url": null, "links": null }, { "name": "Universitat de Valencia, ISP", "roles": [ "processor" ], "url": null, "links": null } ], "tasks": [ "segmentation", "regression" ], "taco_version": "0.5.0", "title": "MethaneSET-EMIT: Hyperspectral Methane Plume Detection from EMIT", "curators": [ { "name": "Julio Contreras", "organization": "Universitat de Valencia, Image and Signal Processing (ISP)", "email": "julio.contreras@uv.es", "role": null }, { "name": "Cesar Aybar", "organization": "Universitat de Valencia, Image and Signal Processing (ISP)", "email": "cesar.aybar@uv.es", "role": null } ], "keywords": [ "methane", "EMIT", "hyperspectral", "plume detection", "matched filter", "IMEO", "CarbonMapper" ], "extent": { "spatial": [ -123.6228, -47.2043, 152.1961, 50.7347 ], "temporal": [ "2022-08-10T06:49:57Z", "2025-11-12T17:40:08Z" ] }, "publications": [ { "citation": "Green, R. O., et al. (2023). EMIT L1B At-Sensor Calibrated Radiance and Geolocation Data 60 m V001. NASA LP DAAC.", "doi": "10.5067/EMIT/EMITL1BRAD.001", "summary": "Source radiance and geolocation." }, { "citation": "Ruzicka, V., et al. (2023). Semantic segmentation of methane plumes with hyperspectral machine learning models. Scientific Reports.", "doi": "10.1038/s41598-023-44918-6", "summary": "Weak/strong plume convention at 1,000 kg/h." }, { "citation": "European Space Agency (2024). Copernicus DEM GLO-30.", "doi": "10.5270/ESA-c5d3d65", "summary": "Elevation layer source." }, { "citation": "Munoz-Sabater, J., et al. (2021). ERA5-Land hourly data. Copernicus Climate Data Store.", "doi": "10.24381/cds.e2161bac", "summary": "Wind layer source." } ], "taco:pit_schema": { "root": { "n": 721, "type": "FOLDER" }, "shape": [ 721, 10 ], "hierarchy": { "1": [ { "n": 7210, "type": [ "FILE", "FILE", "FILE", "FILE", "FILE", "FILE", "FILE", "FILE", "FILE", "FILE" ], "id": [ "radiance.tif", "latlon.tif", "glt.tif", "elevation.tif", "wind.tif", "mf.tif", "rmf.tif", "mag1c.tif", "plume_imeo.tif", "plume_cm.tif" ] } ] } }, "taco:field_schema": { "level0": [ [ "id", "string", "Unique sample identifier within parent scope. Must be unique among siblings." ], [ "type", "string", "Sample type discriminator (FILE or FOLDER)." ], [ "detection:n_imeo", "int64", "Number of distinct IMEO emitters with a plume in this granule" ], [ "detection:n_cm", "int64", "Number of distinct CarbonMapper sources with a plume (upper bound: CM can register one plume under multiple source identities)" ], [ "detection:coverage_imeo", "double", "Percent of scene pixels covered by IMEO plume masks" ], [ "detection:coverage_cm", "double", "Percent of scene pixels covered by CarbonMapper plume masks" ], [ "detection:coverage_union", "double", "Percent of scene pixels covered by the union of both masks" ], [ "detection:imeo_ids", "string", "JSON list of IMEO emitter ids (source_name) present in the scene" ], [ "detection:cm_ids", "string", "JSON list of CarbonMapper source names present in the scene" ], [ "detection:imeo_flux", "string", "JSON dict IMEO emitter -> CH4 flux rate (kg/h); flux completeness enforced at selection" ], [ "detection:cm_flux", "string", "JSON dict CM source -> CH4 flux rate (kg/h); null = unquantified (structural in CM's catalog, not size-biased)" ], [ "detection:sectors", "string", "JSON dict sector -> {imeo: [...], cm: [...]}; CM IPCC codes mapped to IMEO names (97% cross-agreement on matched pairs)" ], [ "detection:sector_list", "string", "JSON list of sectors present in the scene" ], [ "detection:sector", "string", "Dominant sector by plume count" ], [ "detection:n_imeo_weak", "int64", "IMEO plumes with 0 < flux < 1,000 kg/h (weak, following STARCOP)" ], [ "detection:n_imeo_strong", "int64", "IMEO plumes with flux >= 1,000 kg/h (strong)" ], [ "detection:n_cm_noflux", "int64", "CarbonMapper sources without quantified emission" ], [ "detection:n_cm_dup_pairs", "int64", "CarbonMapper plume pairs from DIFFERENT sources overlapping with IoU >= 0.5 in this scene (duplicate identities). If > 0, treat n_cm and the CM source partition as an upper bound; IMEO is the reference catalog" ], [ "detection:cm_dup_groups", "string", "JSON list of GROUPS of CarbonMapper sources that describe the same plume in this scene (connected components of the IoU >= 0.5 overlap graph). A group can hold more than two sources: up to six in this dataset. Use it to check whether the CM source matched to your IMEO plume has twins, in which case its flux and mask area are a lower bound for that plume" ], [ "detection:imeo_flux_total", "double", "Sum of IMEO plume fluxes in the scene (kg/h)" ], [ "detection:imeo_flux_max", "double", "Largest IMEO plume flux in the scene (kg/h)" ], [ "detection:cm_flux_total", "double", "Sum of quantified CarbonMapper fluxes (kg/h)" ], [ "detection:cm_flux_max", "double", "Largest quantified CarbonMapper flux (kg/h)" ], [ "detection:imeo_cod", "string", "JSON dict IMEO emitter -> instance codes in plume_imeo.tif band 1 (a matched IMEO-CM pair shares the same code in both files)" ], [ "detection:cm_cod", "string", "JSON dict CM source -> instance codes in plume_cm.tif band 1" ], [ "match:pairs", "string", "JSON list of matched IMEO-CM pairs (Hungarian assignment on geometry alone: overlap + source distance; flux and sector never used, keeping them free for cross-catalog studies)" ], [ "match:orphans", "string", "JSON dict of unmatched plumes per catalog" ], [ "match:n_pairs", "int64", "Number of accepted IMEO-CM pairs" ], [ "match:n_perfect", "int64", "Pairs without same-catalog overlap ambiguity" ], [ "match:n_orph_imeo", "int64", "IMEO plumes without a CM counterpart" ], [ "match:n_orph_cm", "int64", "CM sources without an IMEO counterpart" ], [ "sensor:shape_rows", "int64", "Sensor-grid rows" ], [ "sensor:shape_cols", "int64", "Sensor-grid columns" ], [ "sensor:sza_mean", "double", "Mean solar zenith angle (deg); intra-scene range is <1 deg" ], [ "sensor:vza_mean", "double", "Mean view zenith angle (deg)" ], [ "sensor:saa_mean", "double", "Mean solar azimuth angle (deg)" ], [ "sensor:vaa_mean", "double", "Mean view azimuth angle (deg)" ], [ "sensor:amf_mean", "double", "Two-way air mass factor 1/cos(SZA)+1/cos(VZA)" ], [ "sensor:phase_mean", "double", "Mean solar phase angle between sun and view vectors (deg); sunglint indicator" ], [ "sensor:path_length_mean", "double", "Mean sensor-to-ground path length (m)" ], [ "sensor:earth_sun_distance", "double", "Earth-Sun distance (AU)" ], [ "meteo:wind_u", "double", "Scene-mean 10 m eastward wind from the wind.tif layer (ERA5-Land, time-interpolated); per-pixel field in wind.tif" ], [ "meteo:wind_v", "double", "Scene-mean 10 m northward wind (m/s), ERA5-Land" ], [ "meteo:wind_speed", "double", "Scene-mean 10 m wind speed (m/s), ERA5-Land. NOTE: this is MethaneSET's own reanalysis wind, not the wind either catalog used to invert its fluxes; for that see imeo_wind and cm_wind" ], [ "meteo:imeo_wind", "string", "JSON dict IMEO emitter -> {u, v, speed} (m/s): the PER-PLUME 10 m wind published by UNEP-IMEO, i.e. the wind IMEO used to invert its own flux rate. Independent of the ERA5-Land wind.tif layer shipped with the scene" ], [ "meteo:cm_wind", "string", "JSON dict CarbonMapper source -> {speed, dir, u, v}: the PER-PLUME wind published by Carbon Mapper (wind_speed_avg_auto and wind_direction_avg_auto), i.e. the wind CM used to invert its own emission. dir follows the meteorological convention (degrees FROM which the wind blows); u and v are derived from speed and dir. Null when CM ships no wind for that plume" ], [ "emit:flight_line", "string", "EMIT flight line identifier" ], [ "emit:time_start", "string", "Acquisition start (UTC)" ], [ "emit:time_end", "string", "Acquisition end (UTC)" ], [ "radiance:min", "double", "Minimum radiance over the full 285-band cube (negative values are calibration noise in dark SWIR bands, kept unclipped)" ], [ "radiance:max", "double", "Maximum radiance over the full cube" ], [ "radiance:elev_min_m", "double", "Minimum elevation (m, Copernicus DEM GLO-30 2024)" ], [ "radiance:elev_max_m", "double", "Maximum elevation (m)" ], [ "site:country", "string", "Country of the scene (from the IMEO portal)" ], [ "spatial:bbox_west", "double", "Bounding box west (deg, EPSG:4326)" ], [ "spatial:bbox_south", "double", "Bounding box south (deg)" ], [ "spatial:bbox_east", "double", "Bounding box east (deg)" ], [ "spatial:bbox_north", "double", "Bounding box north (deg)" ], [ "spatial:imeo_points", "string", "WKT MULTIPOINT of IMEO emission source points" ], [ "spatial:cm_points", "string", "WKT MULTIPOINT of CarbonMapper source points" ], [ "selection:split", "string", "Proposed train/val/test split (70/15/15, grouped by emitter: zero source leakage; users may re-split, everything ships)" ], [ "selection:is_free", "bool", "True = verified plume-free granule from IMEO's full-tile test pool" ], [ "selection:flux_bin", "string", "has_weak / strong_only / free (weak = any IMEO plume under 1,000 kg/h, following STARCOP)" ], [ "internal:current_id", "int64", "Current sample position at this level (0-indexed). Enables O(1) random access and relational JOINs (ZIP, FOLDER, TACOCAT)." ], [ "internal:parent_id", "int64", "Foreign key referencing parent sample position in previous level (ZIP, FOLDER, TACOCAT)." ] ], "level1": [ [ "id", "string", "Unique sample identifier within parent scope. Must be unique among siblings." ], [ "type", "string", "Sample type discriminator (FILE or FOLDER)." ], [ "internal:current_id", "int64", "Current sample position at this level (0-indexed). Enables O(1) random access and relational JOINs (ZIP, FOLDER, TACOCAT)." ], [ "internal:parent_id", "int64", "Foreign key referencing parent sample position in previous level (ZIP, FOLDER, TACOCAT)." ], [ "internal:relative_path", "string", "Relative path from DATA/ directory. Format: {parent_path}/{id} or {id} for level0 (ZIP, FOLDER, TACOCAT)." ] ] } }