{
  "accessLevel": "public",
  "bureauCode": [
    "010:12"
  ],
  "contactPoint": {
    "@type": "vcard:Contact",
    "fn": "Xinchen He",
    "hasEmail": "mailto:xinchenhe@umass.edu"
  },
  "description": "This dataset provides estimated daily ice cover fractions for 107,257 lakes across the Northern Hemisphere from 1980 to 2022. The ice cover fractions were generated using a deep learning model trained on Landsat observations. The model's code is publicly available in the USGS GitLab repository: https://doi.org/10.5066/P13ZGUGE. The dataset consists of 42 CSV files, each corresponding to a single year. Each file contains daily ice cover fraction estimates for all lakes in that year and follows a consistent format. To facilitate data use, we created three descriptive tables of the dataset: 1) A_Dictionary_file_list.csv: Provides a description of each annual CSV file. 2) B_Dictionary_each_file.csv: Documents the structure and format shared by all CSV files. 3) C_List_of_lakes.csv: Lists lake IDs based on the HydroLAKES dataset (https://www.hydrosheds.org/products/hydrolakes). Users may consider regrouping the dataset by lake instead of year after it is downloaded for simpler data analysis.",
  "distribution": [
    {
      "@type": "dcat:Distribution",
      "accessURL": "https://doi.org/10.5066/P1VC2HTX",
      "description": "Landing page for access to the data",
      "format": "XML",
      "mediaType": "application/http",
      "title": "Digital Data"
    },
    {
      "@type": "dcat:Distribution",
      "description": "The metadata original format",
      "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.67c71ea0d34ea599a3b99e17.xml",
      "format": "XML",
      "mediaType": "text/xml",
      "title": "Original Metadata"
    }
  ],
  "identifier": "http://datainventory.doi.gov/id/dataset/USGS_67c71ea0d34ea599a3b99e17",
  "keyword": [
    "USGS:67c71ea0d34ea599a3b99e17",
    "biota",
    "freshwater ecosystems",
    "mathematical modeling",
    "snow and ice cover"
  ],
  "modified": "2025-03-10T00:00:00Z",
  "publisher": {
    "@type": "org:Organization",
    "name": "U.S. Geological Survey"
  },
  "spatial": "-180.0000, 23.5000, 180.0000, 67.5000",
  "theme": [
    "geospatial"
  ],
  "title": "Daily ice cover fractions for 107,257 lakes in the Northern Hemisphere"
}