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Description

WELDAKLL.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 (https://doi.org/10.5067/MEaSUREs/GWELD/GWELDMO.003, https://doi.org/10.5067/MEaSUREs/GWELD/GWELDMO.031, and https://doi.org/10.5067/MEaSUREs/GWELD/GWELDMO.032) datasets.

The NASA Web-Enabled Landsat Data (WELD) Alaska Latitude Longitude (LL) products are defined with 30 meter (m) composite pixel of the center latitude/longitude point. The NASA WELD data contain a range of values for the minimum/maximum latitude and longitude points. The LL products were created to account for the actual center pixel latitude and longitude points.

WELD systematically generated 30 m composited Landsat Enhanced Thematic Mapper Plus (ETM+) mosaics of the United States and Alaska from 2002 to 2012 to provide consistent data for deriving land cover as well as geophysical and biophysical products for regional assessments of surface dynamics for effective study of Earth system function. WELDAKLL is distributed in Hierarchical Data Format 4 (HDF4).

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: 72 S: 50 E: -125 W: -175
Geographic Region
ALASKA
Coordinate System
CARTESIAN
Granule Spatial Representation
GEODETIC
Temporal Extent
2002-12-01 to 2012-12-31
Temporal Resolution
Varies
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
c3544698649-lpcloud
Data State
DEPRECATED
Processing Level
1A
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 Alaska 30m Composite Pixel Center Lat/Longs [Data set]. NASA Land Processes Distributed Active Archive Center. https://doi.org/10.5067/MEASURES/WELD/WELDAKLL.001 Date Accessed: 2025-06-21

Data Center Citation

David Roy. 2013. NASA Web-Enabled Landsat Data Alaska 30m Composite Pixel Center Lat/Longs V001. Sioux Falls, South Dakota, USA: NASA Land Processes Distributed Active Archive Center. 10.5067/MEaSUREs/WELD/WELDAKLL.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.

Learning Resources

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