@prefix dcat: . @prefix dct: . @prefix foaf: . @prefix vcard: . @prefix xsd: . a dcat:Dataset ; dct:creator [ a foaf:Agent ; dct:type "person" ; vcard:hasEmail ; foaf:homepage ; foaf:name "Jianbo Qi" ] ; dct:description """# GNDC-HiGLASS-LS20\r \r GNDC-compressed version of **HiGLASS-LS20** — the first gap-free, 20 m, 5-day\r LAI / FAPAR product over China (2018–2024), derived from integrated\r Landsat-8/9 and Sentinel-2 Analysis Ready Data.\r \r Files are stored as `.gndc` (a neural data cube format; see GeoNDC reference\r below) instead of GeoTIFF to reduce size. **A decoder is required to read them.**\r \r ## Decode\r \r ```bash\r pip install pygndc\r ```\r \r Documentation: https://github.com/jianboqi/pygndc/blob/main/TUTORIAL.md\r \r ### Minimal example\r \r ```python\r import pygndc\r \r # Decode a .gndc file. The output is already in PHYSICAL values\r # (no scale factor needs to be applied).\r data = pygndc.read("HiGLASS_LS20_n018e108_2020_v01_LAI.gndc")\r \r print(data.shape) # (73, rows, cols) — 73 five-day composites\r print(data[0]) # first composite (DOY 001), LAI in m² m⁻²\r ```\r \r > Note: after decoding, values are already physical (LAI in m² m⁻²,\r > FAPAR unitless). Do **not** multiply by the scale factors below — those\r > apply only to the raw uint8 GeoTIFF source and are listed for reference.\r \r ## File naming\r \r ```\r GNDC-HiGLASS_LS20_[lat][lon]_[year]_v01_LAI.gndc\r GNDC-HiGLASS_LS20_[lat][lon]_[year]_v01_FAPAR.gndc\r ```\r \r - Tiles are 1° × 1° (WGS84 / EPSG:4326), centred at integer degree + 0.5°\r (e.g. `n018e108` = 18.5°N, 108.5°E, covering ~18–19°N, 108–109°E).\r - 73 bands per file = 5-day composites: DOY 001, 006, 011, …, 361\r (Jan 1, Jan 6, …, Dec 22).\r \r ## Physical values & ranges\r \r | Variable | Range | Unit |\r |----------|-------|------|\r | LAI | 0 – 10.0 | m² m⁻² |\r | FAPAR | 0 – 1.0 | unitless |\r \r (For reference, the original uint8 GeoTIFF used scale factors LAI ×0.1 and\r FAPAR ×0.004. pygndc returns decoded data already in the physical ranges above.)\r \r ## Extend to other regions (2019–2024)\r \r Open-source pipeline (Google Colab):\r https://colab.research.google.com/drive/1zGYbUkh4COoZqpWA2tfMLZHVfsGZ1nAo\r \r ## Citation\r \r **For the GNDC compression format / decoder:**\r \r Qi, J., M. Li, B. Jiang, Y. Chen, and Q. Wang (2026).\r "GeoNDC: A Queryable Neural Data Cube for Planetary-Scale Earth Observation."\r arXiv:2603.25037 [cs.CV]. https://arxiv.org/abs/2603.25037\r \r ```bibtex\r @misc{qi2026geondc,\r title={GeoNDC: A Queryable Neural Data Cube for Planetary-Scale Earth Observation},\r author={Jianbo Qi and Mengyao Li and Baogui Jiang and Yidan Chen and Qiao Wang},\r year={2026},\r eprint={2603.25037},\r archivePrefix={arXiv},\r primaryClass={cs.CV},\r url={https://arxiv.org/abs/2603.25037}\r }\r ```\r \r **For the underlying HiGLASS-LS20 product:**\r \r Ma, H., Q. Wang, W. Li, Y. Chen, J. Xu, Y. Ma, J. Huang, and S. Liang (2025).\r "The first gap-free 20 m 5-day LAI/FAPAR products over China (2018–2023) from\r integrated Landsat-8/9 and Sentinel-2 Analysis Ready Data."\r *Remote Sensing of Environment*, 331, 115048.\r DOI: 10.1016/j.rse.2025.115048\r \r ## Contact\r \r - Original product: Dr. Han Ma — mahan@hku.hk\r - GNDC packaging & pygndc decoder: Jianbo Qi — jianboqi@bnu.edu.cn\r """ ; dct:identifier "1acaeee8-04e0-5a11-8698-62c7a7738c1d" ; dct:issued "2026-06-15T17:54:23.887000+00:00"^^xsd:dateTime ; dct:modified "2026-06-15T17:58:33.450000+00:00"^^xsd:dateTime ; dct:publisher ; dct:title "GNDC-HiGLASS-LS20: Gap-free 20 m 5-Day LAI/FAPAR over China, 2018–2023" ; dcat:distribution , , . a dcat:Distribution ; dct:format "GNDC" ; dct:issued "2026-06-18T14:07:35.275159"^^xsd:dateTime ; dct:modified "2026-06-18T14:07:35.272136"^^xsd:dateTime ; dct:title "HiGLASS_LS20_n036e117_2018-2023_v01_LAI-FPAR.gndc" ; dcat:accessURL ; dcat:byteSize "381132536"^^xsd:nonNegativeInteger . a dcat:Distribution ; dct:format "GNDC" ; dct:issued "2026-06-18T14:07:35.275155"^^xsd:dateTime ; dct:modified "2026-06-18T14:07:35.272047"^^xsd:dateTime ; dct:title "HiGLASS_LS20_n036e091_2018-2023_v01_LAI-FPAR.gndc" ; dcat:accessURL ; dcat:byteSize "13107200"^^xsd:nonNegativeInteger . a dcat:Distribution ; dct:format "GNDC" ; dct:issued "2026-06-18T14:07:35.275147"^^xsd:dateTime ; dct:modified "2026-06-18T14:07:35.271932"^^xsd:dateTime ; dct:title "HiGLASS_LS20_n034e106_2018-2023_v01_LAI-FPAR.gndc" ; dcat:accessURL ; dcat:byteSize "326675800"^^xsd:nonNegativeInteger . a foaf:Agent ; foaf:name "Source Cooperative" .