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Sentinel-3A OLCI Inland Waters (ILW) Data, version 4

Published by NASA/GSFC/SED/ESD/GCDC/OB.DAAC | National Aeronautics and Space Administration | Catalog Last Checked: August 19, 2026 at 01:08 AM | Dataset Last Updated: April 23, 2025
The Inland Waters dataset (ILW) provides data for lakes and other water bodies across the contiguous United States (CONUS) and Alaska. ILW significantly reduces the processing effort required by end users and is a standardized community resource for lake and reservoir algorithm development and performance assessment. The data is provided for 15,450 CONUS waterbodies with a size of at least one 300 m pixel and over 2,300 resolvable lakes with sizes greater than three 300 m pixels. Alaska has 5,874 lakes resolvable lakes. ILW was developed in collaboration with the Cyanobacteria Assessment Network (CyAN). Additional inland water details and resources, including maps of resolvable lakes and additional inland water products, such as true color imagery, are available at the CyAN site.

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Complete Metadata
@type dcat:Dataset
accessLevel public
bureauCode 
[
  "026:00"
]
contactPoint 
{
  "fn": "undefined",
  "@type": "vcard:Contact",
  "hasEmail": "mailto:sdps@oceancolor.gsfc.nasa.gov"
}
description The Inland Waters dataset (ILW) provides data for lakes and other water bodies across the contiguous United States (CONUS) and Alaska. ILW significantly reduces the processing effort required by end users and is a standardized community resource for lake and reservoir algorithm development and performance assessment. The data is provided for 15,450 CONUS waterbodies with a size of at least one 300 m pixel and over 2,300 resolvable lakes with sizes greater than three 300 m pixels. Alaska has 5,874 lakes resolvable lakes. ILW was developed in collaboration with the Cyanobacteria Assessment Network (CyAN). Additional inland water details and resources, including maps of resolvable lakes and additional inland water products, such as true color imagery, are available at the CyAN site.
distribution 
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  {
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    "title": "Download this dataset through a directory map",
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    "@type": "dcat:Distribution",
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    "format": "PDF",
    "mediaType": "application/pdf",
    "description": "Comparison between TRMM versions 6 and 7.",
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  {
    "@type": "dcat:Distribution",
    "title": "View documentation related to this dataset",
    "format": "HTML",
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  {
    "@type": "dcat:Distribution",
    "title": "Download this dataset through Earthdata Search",
    "format": "HTML",
    "mediaType": "text/html",
    "description": "Use the Earthdata Search to find and retrieve data sets across multiple data centers.",
    "downloadURL": "https://search.earthdata.nasa.gov/search?q=TRMM_3A11"
  },
  {
    "@type": "dcat:Distribution",
    "title": "Get a related visualization",
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]
identifier C2954424032-OB_DAAC
issued 2022-09-13
keyword 
[
  "aquatic-sciences",
  "bacteria-archaea",
  "biological-classification",
  "biosphere",
  "coastal-processes",
  "earth-science",
  "earth-science-services",
  "ecosystems",
  "environmental-advisories",
  "environmental-governance-management",
  "human-dimensions",
  "hydrological-advisories",
  "marine-environment-monitoring",
  "ocean-optics",
  "oceans",
  "surface-water",
  "terrestrial-hydrosphere",
  "water-quality-water-chemistry"
]
landingPage https://doi.org/10.5067/S3A/OLCI/L2/ILW/4
language 
[
  "en-US"
]
modified 2025-04-23
programCode 
[
  "026:001"
]
publisher 
{
  "name": "NASA/GSFC/SED/ESD/GCDC/OB.DAAC",
  "@type": "org:Organization"
}
spatial -180.0 -90.0 180.0 90.0
temporal 2016-04-25T00:00:00Z/2024-05-06T00:00:00Z
theme 
[
  "geospatial"
]
title Sentinel-3A OLCI Inland Waters (ILW) Data, version 4

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