  Spatial scientometrics has attracted a lot of attention in the very recent
past. The visualization methods (density maps) presented in this paper allow
for an analysis revealing regions of excellence around the world using computer
programs that are freely available. Based on Scopus and Web of Science data,
field-specific and field-overlapping scientific excellence can be identified in
broader regions (worldwide or for a specific continent) where high quality
papers (highly cited papers or papers published in Nature or Science) were
published. We used a geographic information system to produce our density maps.
We also briefly discuss the use of Google Earth.
