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Data Set ID: 
NSIDC-0481

MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from InSAR, Version 4

This data set, part of the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) program, provides velocity estimates determined from Interferometric Synthetic Aperture Radar (InSAR) data for major glacier outlet areas in Greenland, some of which have shown profound velocity changes over the MEaSUREs observation period. The InSAR Selected Glacier Site Velocity Maps are produced from image pairs measured by the German Aerospace Center's (DLR) twin satellites TerraSAR-X / TanDEM-X (TSX / TDX). The measurements in this data set are provided in addition to the ice sheet-wide data from the related data set, MEaSUREs Greenland Ice Sheet Velocity Map from InSAR Data.

See Greenland Ice Mapping Project (GIMP) for more related data.

This is the most recent version of these data.

Version Summary: 

This version contains the following changes:
-Updated temporal coverage
-Use of GDAL 3.2.1 to create cloud optimized GeoTIFFs
-Data reprocessed utilizing a corrected DEM. See user note in section 2.2.5

COMPREHENSIVE Level of Service

Data: Data integrity and usability verified; data customization services available for select data

Documentation: Key metadata and comprehensive user guide available

User Support: Assistance with data access and usage; guidance on use of data in tools and data customization services

See All Level of Service Details

Parameter(s):
  • SNOW/ICE > ICE VELOCITY
Data Format(s):
  • GeoTIFF
  • JPEG
Spatial Coverage:
N: 82, 
S: 60, 
E: -20, 
W: -70
Platform(s):TSX
Spatial Resolution:
  • 100 m x 100 m
Sensor(s):X-SAR
Temporal Coverage:
  • 12 June 2008
Version(s):V4
Temporal Resolution11 dayMetadata XML:View Metadata Record
Data Contributor(s):Ian Joughin, Ian Howat, Ted Scambos, Ben Smith

Geographic Coverage
Other Access Options

Other Access Options

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Download Via HTTPS: An Earthdata Login account is required to access these data.

Once you have logged in, you will be able to click and download files via a Web browser. There are also options for downloading via a command line or client. For more detailed instructions, please see Options Available for Bulk Downloading Data from HTTPS with Earthdata Login.

Earthdata Search: This application allows you to search, visualize, and access data across thousands of Earth science data sets. Additional customization services are available for select data sets, including subsetting, reformatting, and reprojection.

As a condition of using these data, you must cite the use of this data set using the following citation. For more information, see our Use and Copyright Web page.

Joughin, I., I. Howat, B. Smith, and T. Scambos. 2021. MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from InSAR, Version 4. [Indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi: https://doi.org/10.5067/GQZQY2M5507Z. [Date Accessed].

Literature Citation

As a condition of using these data, we request that you acknowledge the author(s) of this data set by referencing the following peer-reviewed publication.

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How To

Programmatic Data Access Guide
Data from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) can be accessed directly from our HTTPS file system or through our Application Programming Interface (API). Our API offers you the ability to order data using specific temporal and spatial filters... read more
Filter and order from a data set web page
Many NSIDC data set web pages provide the ability to search and filter data with spatial and temporal contstraints using a map-based interface. This article outlines how to order NSIDC DAAC data using advanced searching and filtering.  Step 1: Go to a data set web page This article will use the... read more
How do I reproject a geoTIFF from polar stereographic to geographic lat/lon?
We recommend using the Geospatial Data Abstraction Library (GDAL) or a GIS to reproject geoTIFF files. Here we outline command line or python options for using GDAL, and instructions for QGIS and ArcMap to... read more
How do I convert a GeoTIFF into a NetCDF file?
We recommend using the Geospatial Data Abstraction Library (GDAL) to convert GeoTIFF files into a different format. If you want to reproject to lat/lon as well, then we recommend reprojecting before converting to NetCDF (see the FAQ "How do I reproject a GeoTIFF to from polar steroegraphic to... read more
How to spatially subset and visualize MEaSUREs GIMP image and velocity products
There are external Jupyter notebooks available that can be used to download user-defined spatial subsets of the following MEaSUREs GIMP products: MEaSUREs Greenland Annual Ice Sheet Velocity Mosaics from SAR and Landsat... read more
How to build a QGIS project with MEaSUREs GIMP image and velocity products
There are external Jupyter notebooks available that can be used to search for GIMP products and incorporate them into a new QGIS project: MEaSUREs Greenland Annual Ice Sheet Velocity Mosaics from SAR and Landsat... read more

FAQ

Do you have sample code to read GeoTiffs?
The answer is yes. 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 data from: MEaSUREs Greenland Ice Sheet Velocity Mosaics SAR and Landsat, Version 1 (NSIDC-... read more
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Questions? Please contact:
NSIDC User Services
Phone: 1 303 492-6199
Email: nsidc@nsidc.org