WELDUSLL: Conterminous US Landsat Pixel Center Coordinates

From 2002 to 2012, this dataset provides the geographic latitude and longitude for the center of each 30-meter pixel within composited Landsat ETM+ mosaics of the Conterminous United States and Alaska. It was created as part of NASA's Web-Enabled Landsat Data (WELD) project to support consistent derivation of land cover, geophysical, and biophysical products. The dataset has been decommissioned and users are directed to its successor, the Global Web-Enabled Landsat Data (GWELD) product.

Use Cases

• Georeferencing other WELD data layers based on the provided pixel center coordinates.
• Conducting regional land cover change analysis using the consistent 30-meter resolution data from 2002-2012.
• Deriving geophysical and biophysical products for studies of Earth system function.
• Assessing surface dynamics across the Conterminous United States and Alaska.

Strengths

• Provides a consistent 11-year time series from 2002 to 2012.
• Offers high spatial resolution with 30-meter pixel-level geolocation data.
• Is a product of a collaboration between NASA, USGS EROS, and South Dakota State University.

Limitations

• The dataset is decommissioned (as of December 2, 2019) and superseded by newer products.
• The exact number of rows or data volume is unspecified.
• Data is distributed in the legacy HDF4 format.

Provenance

Source

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

Collection Method

Generated from composited 30-meter Landsat Enhanced Thematic Mapper Plus (ETM+) mosaics.

Time Range

2002 to 2012

Freshness

The underlying data collection ended in 2012, though metadata was updated on platforms as late as 2026.

Geography

Conterminous United States (CONUS) and Alaska