NASA Web-Enabled Landsat Data Alaska 30m Composites over Weekly Periods V001

Metadata Updated: March 23, 2019

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

WELD systematically generates 30 m composited Landsat Enhanced Thematic Mapper Plus (ETM+) mosaics of the United States and Alaska from 2002 – 2012 to provide consistent data for deriving land cover, geophysical, and biophysical products for regional assessments of surface dynamics for effective studying of Earth system functioning.

The Land Processes Distributed Active Archive Center (LP DAAC) is responsible for archive and distribution of NASA WELD, which includes the Alaska weekly product suite.

The WELD Alaska Weekly products are defined simply with respect to each calendar year, and as consecutive 7-day products with Week01: January 1 to January 7, Week02: January 8 to January 14, ,Week 52: December 24 to December 30 (non-leap years) or December 23 to December 29 (leap years), Week 53: December 30th to December 31st (leap years) or December 31st (non-leap years).

Data Set Characteristics: Scene Coverage: 1º x 1º tiles Image Dimensions: 5000 x 5000 Total Number Tiles: 162 Alaska Tile Volume: 4 GB Compression Type: zip File Format: HDF4, GeoTIFF Map Projection: Albers Equal Area Datum: World Geodetic System 84 (WGS84) Pixel Size: 30 m

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources


Metadata Created Date August 1, 2018
Metadata Updated Date March 23, 2019

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date March 23, 2019
Publisher LP DAAC
Unique Identifier C1000000084-LPDAAC_ECS
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Citation Archived by National Aeronautics and Space Administration, U.S. Government, LP DAAC.
Datagov Dedupe Retained 20190322235447
Harvest Object Id 7466a339-8b0b-43bd-b821-77c0a745973e
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2013-08-07
Homepage URL
Language en-US
Metadata Type geospatial
Data Last Modified 2015-09-02
Program Code 026:001
Source Datajson Identifier True
Source Hash 41dc1503f025fe5b96cf7e3d3db8bdc257ce7b0f
Source Schema Version 1.1
Spatial -175.0 50.0 -125.0 72.0
Temporal 2003-01-22T00:00:00Z/2012-12-29T23:59:59Z
Category WELD, geospatial

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