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Glacier Image Velocimetry (GIV) is a toolbox for calculating timeseries of glacier flow velocities from optical satellite imagery.

GIV is easy to use and allows you to rapidly calculate glacier flow over multiple years, over many glaciers and at high resolution - all though a convenient user interface and without needing to do any coding.

GIV aims to be versatile enough for use in research, and convenient enough for use in teaching (and undergraduate dissertations, etc). Have a look at our documentation below, including the full source code, a video tutorial, pdf user manual and 2021 paper in The Cryosphere.

Download GIV from our GitHub or Zenodo repositories (click on the logos)

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Read our paper in The Cryosphere (Van Wyk de Vries and Wickert, 2021):

https://doi.org/10.5194/tc-15-2115-2021

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Download the GIV user manual (click box above)

Get in touch with me for any questions and suggestions: vanwy048@umn.edu

Watch a video tutorial for GIV below. The first video is a 'quick-start' general overview, and the following 8 videos cover various aspects of feature tracking and the GIV toolbox in detail.

GIV tutorial 1: Zero to ice flow in 10 minutes

If you prefer, you can also access the video playlist here :

https://www.youtube.com/playlist?list=PLvmutZUG2r9RejnUXHeWg9EqKvQ0TMe5Q

GIV tutorial 2: Background and history of feature-tracking

GIV tutorial 3: Accessing satellite imagery

GIV tutorial 4: Preparing the files for GIV

GIV tutorial 5: Basic inputs

GIV tutorial 6: Advanced inputs

GIV tutorial 7: Running the model

GIV tutuorial 8: Model Outputs

GIV tutorial 9: Future questions

Thanks for watching, and I hope the tutorial was helpful. Check the youtube video descriptions, our TC paper and GIV pdf user manual (download above) for additional details. And try it out - it has an easy learning curve and you will quickly produce some interesting results.

If you are interested in using GIV for research or teaching but are having some issue, let me know (vanwy048@umn.edu). I am happy to have a chat about it all.