df <- data.frame(Postcode=c("EC3M 7HA", "EC2P 2EJ"), Tip=c("<a href='http://www.lloyds.com'>Lloyd's</a>", "<a href='http://www.guildhall.cityoflondon.gov.uk/'>Guildhall</a>")) M2 <- gvisMap(df, "Postcode", "Tip", options=list(showTip=TRUE, mapType='normal', enableScrollWheel=TRUE, width=500, height=300)) plot(M2)