The map will likely prove to be a precious tool in the struggles against deforestation and the coastal erosion that threatens Cotonou, the economic capital, port and biggest city in Benin.

Things in the West African state have sure changed since 1957, and the old maps were left in the dust as the population nearly quadrupled and cities and towns expanded relentlessly.

Today, though, map-makers are proud to unveil a 21st-century digital chart that they hope will serve Benin for many years, helping to guide development and preserve its environment.