MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from Optical Images, Version 2
Data set id:
NSIDC-0646
DOI: 10.5067/VM5DZ20MYF5C
There is a more recent version of these data.
Version Summary
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.
Data Access & Tools
This data set has been retired. There is a more recent version of these data.
Documentation
Help Articles
How to Articles
Many NSIDC DAAC data sets can be accessed using the NSIDC DAAC's Data Access Tool. This tool provides the ability to search and filter data with spatial and temporal constraints using a map-based interface.Users have the option to
Harmony API Quickstart Guide: Customizing NASA NSIDC DAAC data in Earthdata Cloud
Below the image in this article, you will find sample code in IDL, MATLAB, and Python to read in a GeoTIFF file, extract the metadata, and create an image.
The code has been tested with the following data products:
We recommend using the Geospatial Data Abstraction Library (GDAL) to convert GeoTIFF files into a different format.
We recommend using the Geospatial Data Abstraction Library (GDAL) or a GIS to reproject geoTIFF files.
All data from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) is directly accessible through our HTTPS file system using Wget or curl. This article provides basic command line instructions for accessing data using this method.