AfTerFibre or African Terrestrial Fibre is a map of African terrestrial (and now undersea) fibre optic infrastructure initiatives. It was developed with some initial support from Google and is now hosted and supported by the Network Startup Resource Center
AfTerFibre is an Open Data initiative with data sources available for public download under a Creative Commons Attribution-Only licence (CC-BY-4.0). The dataset for the terrestrial fibre maps displayed can be downloaded in a variety of formats, including CSV, SHP, KML, GEO JSON, and SVG
Maps for AfTerFibre are typically sourced as raster images, sometimes from the corporate websites of operators, sometimes from studies or reports on regional infrastructure development, and sometimes through personal contacts. Maps that are not already available on the web are uploaded to a Flickr website. The raster images are then digitally traced and converted into GIS format and uploaded to the CartoDB, a cloud-based GIS platform.
There are many ways to contribute to the AfTerFibre map. Perhaps the easiest way is to simply point out an error. You can do this easily by tweeting with the hashtag #AfTerFibre. For convenience, when you click on an fibre segment, there is a link in the infowindow that will pre-populate a tweet with details of the segment you wish to have corrected.
If you're interested in helping improve the look and utility of the website, you can find the source code for it on Github. Feel free to make suggestions, contribute, or fork the code for your own purposes.
There is also an AfTerFibre Google Group where you can ask questions and get more involved.