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Description

WELDUSMO.015 was decommissioned on December 2, 2019. Users are encouraged to use the improved monthly Global Web-Enabled Landsat Data (GWELD) Version 3, 3.1, and 3.2 datasets.

NASA’s Web-Enabled Landsat Data (WELD) are generated from composited 30 meter (m) Landsat Enhanced Thematic Mapper Plus (ETM+) mosaics of the United States and Alaska from 2002 to 2012. These mosaics provide consistent data to derive land cover, geophysical, and biophysical products for regional assessments of surface dynamics for effective study of Earth system function. The WELD Conterminous (CONUS) United States Monthly products include Top of Atmosphere (TOA) Reflectance and Brightness Temperature, along with the Normalized Difference Vegetation Index (NDVI) generated from Band 3 and Band 4 TOA Reflectance. These products are distributed in Hierarchical Data Format 4 (HDF4).

WELDUSMO products are defined by a calendar month (e.g. January, February, March, etc.) for December 2002 through November 2012.

The WELD project is funded by the National Aeronautics and Space Administration (NASA) and is a collaboration between the United States Geological Survey (USGS) Earth Resources Observation and Science (EROS) Center and the South Dakota State University (SDSU) Geospatial Sciences Center of Excellence (GSCE).

Known Issues

  • WELD Version 1.5 known issues can be found in the WELD Version 1.5 User Guide.

Improvements/Changes from Previous Version

  • Version 1.5 is the original version.

Product Summary

Platforms
LANDSAT-7
Instruments
ETM+
Spatial Extent
N: 52 S: 23 E: -65 W: -127
Geographic Region
UNITED STATES OF AMERICA
Coordinate System
CARTESIAN
Granule Spatial Representation
GEODETIC
Temporal Extent
2002-12-01 to 2012-11-30
Temporal Resolution
1 Month
Data Partner
Land Processes Distributed Active Archive Center (LP DAAC)
Geographic Information Science Center of Excellence, South Dakota State University (SD-STATE/GISCCE)
Concept ID
c3545741014-lpcloud
Data State
DEPRECATED
Processing Level
1T
Published
Updated

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

South Dakota State University. (2013). NASA Web-Enabled Landsat Data CONUS 30m Composites over Monthly Periods [Data set]. NASA Land Processes Distributed Active Archive Center. https://doi.org/10.5067/MEASURES/WELD/WELDUSMO.001 Date Accessed: 2025-07-19

Data Center Citation

David Roy. 2013. NASA Web-Enabled Landsat Data CONUS 30m Composites over Monthly Periods V001. Sioux Falls, South Dakota, USA: NASA Land Processes Distributed Active Archive Center. 10.5067/MEaSUREs/WELD/WELDUSMO.001.

Documents

ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD) The ATBD provides physical theory and mathematical procedures for the calculations used to produce the data products.
USER'S GUIDE The technical information in the User's Guide enables users to interpret and use the data products.

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