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Altamira is developed by the NSRR team, and is used to display EDFs hosted on the NSRR in your web browser. Altamira leverages the Edfize Ruby gem to read EDFs and displays them on an HTML5 canvas using JavaScript.

You can see the tool in action here:

Learn EDF-01

Altamira is open source, and you may use it as a starting point for your own web rendering of EDFs. If you make any improvements in rendering or displaying the EDFs, feel free to contribute improvements via pull request on GitHub if you want to help the development of the viewer. Thanks!