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OLI Resources
Earthdata resources for users working with NASA’s Operational Land Imager (OLI) include tutorials and other learning resources, news announcements such as instrument updates and data releases, user guides and related documents, and frequently asked questions.
OLI Learning Resources
FIRMS has incorporated additional capabilities into the HLS dropdown menu of its interactive map, including four vegetation indices and the ability for user to create their own red, green, blue (RGB) image composites through the TiTiler-CMR service.
Tutorial
April 29, 2026
This three-part ARSET training covers flood monitoring via remote sensing, NASA flood products, and GEOGLOWS streamflow predictions.
Training
June 18-25, 2026
Create your own Harmonized Landsat Sentinel 2 (HLS) image composite or select from a preset list.
Tutorial
April 29, 2026
This ARSET training covers how to acquire, use, and derive NDVI imagery from Landsat and MODIS.
Training
Feb. 10 - March 2, 2016
This ARSET training explores how the R statistical coding language can be used to classify land cover and quantify changes in land cover over time.
Training
Feb. 24-26, 2026
This ARSET training introduces STREAM, a web tool for monitoring chlorophyll-a concentration, Secchi disk depth, and total suspended solids in inland lakes and coastal regions.
Training
Feb. 10-17, 2026
Using SNWG's OPERA DSWx product, USGS is able to monitor streamflow from space, augmenting hazardous in-person collection techniques.
Data in Action
July 8, 2025
Learn how to search for, access, and process HLS data.
External Resource
GitHub Repository
Sept. 20, 2024
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The TiTiler-CMR service generates dynamic, on-demand map tile layers that can be incorporated into GIS software and visualization applications. Two NASA mapping applications – Worldview and FIRMS – have harnessed the versatility of this service.
Feature Article
April 29, 2026
Join the NASA Satellite Needs Working Group Implementation Team (NSITE) for a virtual workshop showcasing the Harmonized Landsat and Sentinel-2 (HLS) Solution.
Event
March 26, 2026
An upcoming training offered by NASA's ARSET program introduces a web-based platform for monitoring lake and coastal water conditions using satellite data.
News
Dec. 19, 2025
Harmonized Landsat and Sentinel-2 (HLS) image captured on December 1, 2025, by the OLI instrument aboard the Landsat 8 platform.
Worldview Image of the Week
Dec. 12, 2025
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Frequently Asked Questions
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