Editing 1683: Digital Data

However, in this comic, [[Randall]] points out that while digital information itself doesn't need to degrade, things that are on the Internet are often degraded through copying when the copy is not a 1:1 copy or changes are deliberately introduced. In addition, as technology advances, the method to save or call the information changes and the medium to view it changes, occasionally causing misinterpreted information. (This is also demonstrated with the mouseover text.) As the frames continue, they gain the appearance of images which have been screenshotted repeatedly, with a resulting loss of quality due to compression of the original resolution and {{w|JPEG}} {{w|compression artifact|artifacting}}. (The JPEG format is intended for representing photorealistic grayscale or color images; when misused for line drawings, such as comic strips, any compression artifacts become particularly noticeable, as the background is normally of completely uniform color.) In the last frame, this is taken to an extreme, as the frame appears to have been very sloppily screenshotted off of at least two different smartphones (not the same device that uses the bottom frame in the third panel as the top border in panel four), and the final image is covered both with a watermark from an unregistered screenshot program, as well as references to at least two different web sites: {{w|9GAG}} (bottom right image) and {{w|Tumblr}} in the web address bottom left. 9GAG is an online platform and social media website where users upload and share content of their own, or of other networks. It is often accused of rehosting other sites' funny content without attribution and adding their own watermark to the image or video.

The mouseover text is seemingly addressed to a reader in the future who will only be able to access xkcd through a {{w|digital archive}}. Digital information might not degrade with time, but it can't be properly displayed without knowledge of the encoding. As new encodings and file formats get developed and old ones abandoned, the webpage format of the comic might not be available in the future, when users would need special archives to view content from today's world. The mouseover text contains seemingly {{w|mojibake|garbage characters}}, which typically result from data being interpreted according to a {{w|character encoding}} different from the one used to encode it. In this case, the characters are the result of encoding the string [https://ftfy.vercel.app/?s=%C3%A2%E2%82%AC%C5%93If+you+can+read+this%2C+congratulations%C3%A2%E2%82%AC%E2%80%9Dthe+archive+you%C3%A2%E2%82%AC%E2%84%A2re+using+still+knows+about+the+mouseover+text%C3%A2%E2%82%AC%C2%9D%21 <tt>“If you can read this, congratulations—the archive you’re using still knows about the mouseover text”!</tt>] using {{w|UTF-8}} (which represents non-{{w|ASCII}} {{w|Unicode}} characters as multibyte sequences) and then interpreting the resulting bytes as the still commonly used {{w|Windows-1252}}  encoding (which uses only one byte per character, but utilizes the non-ASCII codepoints for a limited selection of extra letters and symbols such as "â" or "€"). This shows that degradation of digital data through conversions isn't restricted to images. Furthermore, as screen navigation moves away from the mouse toward touch, voice recognition, and modes still to be implemented, mouseover text will itself become archaic.