WELDAKLL v015

NASA Web-Enabled Landsat Data Alaska Latitude/Longitude


PI: David Roy

Description

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).

Characteristics

Improvements/Changes from Previous Versions

Version 1.5 is the original version.

Collection and Granule

Collection

Characteristic Description
CollectionMEaSUREs WELD
DOI10.5067/MEaSUREs/WELD/WELDAKLL.001
File Size~305 MB
Temporal ResolutionOther
Temporal Extent2002-12-01 to 2012-12-31
Spatial ExtentAlaska (United States)
Coordinate SystemAlbers Equal Area
DatumWorld Geodetic System (WGS84)
File FormatHDF4
Geographic Dimensions150 km x 150 km

Granule

Characteristic Description
Number of Science Dataset (SDS) Layers2
Columns/Rows5000 x 5000
Pixel Size30 m

Layers

SDS Name Description Units Data Type Fill Value No Data Value Valid Range Scale Factor Additional Offset
Longitude Center Longitude of each 30 m pixel Degree 64-bit floating point N/A N/A N/A N/A N/A
Latitude Center Latitude of each 30 m pixel Degree 64-bit floating point N/A N/A N/A N/A N/A

Product Quality

WELD Version 1.5 product quality information can be found on the WELD Project website.

Known Issues

WELD Version 1.5 known issues can be found on the WELD Project website.

Documentation

Using the Data

Tools

Citation

DOI: 10.5067/MEaSUREs/WELD/WELDAKLL.001

About the Image