| { | |
| "id": "maya4-sar", | |
| "dataset_version": "1.0.0", | |
| "description": "Sentinel-1 SAR data with raw, range compression, RCMC, and azimuth compression levels", | |
| "licenses": [ | |
| "CC-BY-4.0" | |
| ], | |
| "providers": [ | |
| { | |
| "name": "MAYA4 Project", | |
| "roles": [ | |
| "producer" | |
| ], | |
| "url": null, | |
| "links": null | |
| } | |
| ], | |
| "tasks": [ | |
| "other" | |
| ], | |
| "taco_version": "0.5.0", | |
| "title": "MAYA4 SAR Processing Dataset", | |
| "curators": null, | |
| "keywords": [ | |
| "SAR", | |
| "Sentinel-1", | |
| "radar", | |
| "complex", | |
| "raw" | |
| ], | |
| "extent": { | |
| "spatial": [ | |
| -180.0, | |
| -90.0, | |
| 180.0, | |
| 90.0 | |
| ], | |
| "temporal": null | |
| }, | |
| "taco:pit_schema": { | |
| "root": { | |
| "n": 4, | |
| "type": "FOLDER" | |
| }, | |
| "hierarchy": { | |
| "1": [ | |
| { | |
| "n": 20, | |
| "type": [ | |
| "FILE", | |
| "FILE", | |
| "FILE", | |
| "FILE", | |
| "FILE" | |
| ], | |
| "id": [ | |
| "az", | |
| "raw", | |
| "rc", | |
| "rcmc", | |
| "pulses" | |
| ] | |
| } | |
| ] | |
| } | |
| }, | |
| "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)." | |
| ], | |
| [ | |
| "sar:polarization", | |
| "string", | |
| "Polarization mode (HH, VV, HV, VH)" | |
| ], | |
| [ | |
| "sar:swath", | |
| "string", | |
| "Swath identifier" | |
| ], | |
| [ | |
| "sar:orbit", | |
| "uint32", | |
| "Orbit number" | |
| ], | |
| [ | |
| "sar:tx_ramp_rate", | |
| "double", | |
| "Transmit chirp ramp rate (Hz/s)" | |
| ], | |
| [ | |
| "sar:tx_pulse_start_freq", | |
| "double", | |
| "Transmit pulse start frequency (Hz)" | |
| ], | |
| [ | |
| "sar:tx_pulse_length", | |
| "double", | |
| "Transmit pulse length (s)" | |
| ], | |
| [ | |
| "sar:pri", | |
| "double", | |
| "Pulse Repetition Interval (s)" | |
| ], | |
| [ | |
| "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)." | |
| ], | |
| [ | |
| "sar:compression_ratio", | |
| "float", | |
| "Compression ratio (raw/compressed)" | |
| ], | |
| [ | |
| "sar:max_err", | |
| "float", | |
| "Maximum error from precision loss" | |
| ], | |
| [ | |
| "sar:rmse", | |
| "float", | |
| "RMSE from complex128→complex64 conversion" | |
| ], | |
| [ | |
| "sar:size_gb", | |
| "float", | |
| "Compressed TIFF size in GB" | |
| ], | |
| [ | |
| "taco:header", | |
| "binary", | |
| "Binary TACOTIFF header (35 bytes + tile counts) for fast reading without IFD parsing" | |
| ], | |
| [ | |
| "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)." | |
| ] | |
| ] | |
| } | |
| } |