While the source code for the Paperscape browser-based map client was released on Github in early 2015, the back-end code first required a clean up before it could meet a similar fate. The inspiration to finally do so came from a Paperscape-related project we worked on for the Max Planck Digital Library in September this year. As a result, a significant part of the Paperscape back-end is now available on Github under a MIT license. That includes the code for n-body map generation (written in C), map tile generation (written in Go), and the web-server (also in Go).

Recent incremental updates to Paperscape include:

• update of the Paperscape arXiv graph data from 1991 to the end of 2015,
• click-to-search authors in the map-client,
• improved heatmap colour scheme,
• general UI improvements.