It is working to digitise the millions of coveted archive of century-old maps, surveys, and files of mining companies within five years.

It is working to digitise the millions of coveted archive of century-old maps, surveys, and files of mining companies within five years.

From century-old maps to meticulous field notes, Belgium is sitting on a trove of geological records on colonial-era Congo -- a coveted archive it is working to open up amid a…