This the second map of the Dutch Twitter population according to the Twittergids data. In the first part I visualized the top 25 Twitter cities in the Netherlands. In this follow-up image Esther Weltevrede and I looked into the relative number of Twitter users per 1000 inhabitants for each province. Color density is relative to the highest penetration (province of North Holland).
What is striking is that the province of Groningen has a relatively high number of Twitter users per 1000 inhabitants.
Hi-resolution images available here.