MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from Optical Images, Version 2

Data set id:

NSIDC-0646

DOI: 10.5067/VM5DZ20MYF5C

Data Citation and Acknowledgment
As a condition of using these data, you must cite the use of this data set. Such a practice gives credit to data set producers and advances principles of transparency and reproducibility.

Howat, I. (2017). MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from Optical Images. (NSIDC-0646, Version 2). [Data Set]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/VM5DZ20MYF5C. [describe subset used if applicable]. Date Accessed 12-12-2024.

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There is a more recent version of these data.
Version Summary

Changes for Version 2 include:

A correction was applied in the processing, which caused error values to appear as NaNs in some of the data.

A more aggressive filtering method was applied to remove small, isolated clusters of data.

Cross-path Landsat pairs were used to fill in temporal gaps in the 2016 data, using the MEaSUREs Greenland Ice Mapping Project (GIMP) Digital Elevation Model from GeoEye and WorldView Imagery and the orthorectifcation algorithm of Rosenau (2012).

Spatial coverage was expanded to include more outlet glaciers in Greenland.

Temporal coverage was expanded.

To reduce overall size of the data set, GeoTIFFs are now produced using Lempel–Ziv–Welch LZW lossless compression.

Overview

This data set, part of the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) program, consists of mean monthly velocity maps for selected glacier outlet areas. The maps are generated by tracking visible features between optical image pairs acquired by the Landsat 4 and 5 Thematic Mapper (TM), the Landsat 7 Enhanced Thematic Mapper Plus (ETM+), the Landsat 8 Operational Land Imager (OLI), and the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER). See Greenland Ice Mapping Project (GIMP) for related data.

Parameter(s):

ICE VELOCITY

Platform(s):

LANDSAT-4, LANDSAT-5, LANDSAT-7, LANDSAT-8, Terra

Sensor(s):

ASTER, ETM+, OLI, TM

Data Format(s):

PNG, GeoTIFF

Temporal Coverage:

1 March 1985 to 31 December 2018

Temporal Resolution:

1 month

Spatial Resolution:

100 m

100 m

Spatial Reference System(s):

WGS 84 / NSIDC Sea Ice Polar Stereographic North

EPSG:3413

Spatial Coverage:

N:

82

S:

60

E:

-20

W:

-70

Blue outlined yellow areas on the map below indicate the spatial coverage for this data set.

View Metadata Record

Data Access & Tools

This data set has been retired. There is a more recent version of these data.

Documentation

User Guide

MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from Optical Images, Version 2 User Guide

ATBDs

Greenland Ice Mapping Project 2 (GIMP-2) Algorithm Theoretical Basis Document

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