# Source: HydroLAKES
# Type: vector
# Catalog: Manual
# Created for: CBGB benchmark problems

source:
  id: hydrosheds-hydrolakes
  name: HydroLAKES v1.0
  type: vector
  url: https://www.hydrosheds.org/products/hydrolakes
  description: >
    HydroLAKES is a database of 1.4 million lakes and reservoirs worldwide,
    derived from the HydroSHEDS framework. It provides shoreline polygons and
    attribute data for all lakes with a surface area of at least 10 hectares.
    Attributes include lake area, volume estimates, shore length, average depth,
    elevation, and pour point coordinates. The dataset supports global-scale
    hydrological and ecological analyses involving lake distribution, water
    storage, and freshwater biodiversity.
  provider: HydroSHEDS / WWF
  license: CC-BY-4.0
  metadata:
    connector_id: null
    tags:
    - Lakes
    - Reservoirs
    - Hydrology
    - Global
    - Vector
    - HydroSHEDS
    - Freshwater
    dataset:
      tier: 1
      thematic_group: Hydrology & Water
      format: geopackage
      crs: EPSG:4326
      fields:
      - id: Hylak_id
        description: Unique lake identifier
        dtype: int64
      - id: Lake_name
        description: Lake name (where available)
        dtype: string
      - id: Country
        description: Country name
        dtype: string
      - id: Continent
        description: Continent name
        dtype: string
      - id: Lake_area
        description: Lake surface area (km2)
        dtype: float64
      - id: Vol_total
        description: Estimated total volume (million m3)
        dtype: float64
      - id: Depth_avg
        description: Estimated average depth (m)
        dtype: float64
      - id: Shore_len
        description: Shoreline length (km)
        dtype: float64
      - id: Elevation
        description: Lake surface elevation (m above sea level)
        dtype: float64
      - id: Lake_type
        description: Lake type (1=lake, 2=reservoir, 3=lake control)
        dtype: int32
      - id: Pour_lat
        description: Latitude of pour point
        dtype: float64
      - id: Pour_long
        description: Longitude of pour point
        dtype: float64
      temporal:
        range: 2016-01-01/2016-12-31
        frequency: static
        type: snapshot
        default_range: latest
      quality:
        methodology: >
          Derived from SRTM void-filled DEM and Landsat-based water masks.
          Lake polygons generated from HydroSHEDS drainage direction grids.
          Volume estimates based on empirical area-depth relationships.
        accuracy: >
          Positional accuracy limited by SRTM resolution (~90m). Volume
          estimates have ~30% uncertainty. See Messager et al. 2016,
          Nature Communications 7:13603.
        coverage: global
      layout:
        type: single_file
      access:
        type: http
        url: https://data.hydrosheds.org/file/hydrolakes/HydroLAKES_polys_v10.gdb.zip
        notes: >
          Free download after registration. Available as GeoDatabase, Shapefile,
          or GeoPackage. Also accessible via Google Earth Engine.
      original_source_url: https://www.hydrosheds.org/products/hydrolakes
      homepage: https://www.hydrosheds.org/products/hydrolakes
      gee_asset_id: projects/sat-io/open-datasets/HydroLakes/lake_poly_v10
      cbgb_problems:
      - FRC_8
      - FRC_9
      - FRC_10
      - FRC_11
      - FRC_12