WELDAKWK: Alaska Landsat Weekly Composites

Alaska and the United States are covered by this dataset of weekly, 30-meter resolution Landsat ETM+ mosaics from 2003 to 2012. It provides Top of Atmosphere reflectance, brightness temperature, and NDVI composites designed for regional land surface assessments. The data is part of the NASA Web-Enabled Landsat Data (WELD) project, a collaboration between NASA, USGS EROS, and South Dakota State University.

Use Cases

• Monitoring vegetation health and phenology based on weekly NDVI composites.
• Analyzing land surface temperature trends using brightness temperature data.
• Deriving consistent land cover and biophysical products for regional assessments.
• Studying surface dynamics and Earth system function over a multi-year period.

Strengths

• Provides consistent, 30-meter resolution data across a 9-year time range (2003-2012).
• Offers weekly temporal composites, enabling fine-scale analysis of surface changes.
• Is a product of a major collaboration between NASA, USGS, and an academic institution.

Limitations

• The dataset was decommissioned in December 2019, indicating it is a legacy product.
• Specific column names and dataset size are not provided in the available metadata.
• Users are directed to newer GWELD monthly products, suggesting this version is superseded.

Provenance

Source

NASA Web-Enabled Landsat Data (WELD) project, a collaboration between NASA, USGS EROS, and South Dakota State University GSCE.

Collection Method

Generated from composited Landsat Enhanced Thematic Mapper Plus (ETM+) mosaics.

Time Range

2003 to 2012

Freshness

The dataset itself is historical (2003-2012), but metadata was last updated on 2026-04-09.

Geography

Alaska and the United States