Dr John MacCulloch MD was a pioneer of geological cartography. Prior to his surveys there had been few attempts to map and survey Scotland. Of these few, only the student efforts of Louis-Albert Necker de Saussure and the published map of Aimé Boué have attempted to show the whole country. MacCulloch's geological map of Scotland, published posthumously in 1836, remains one of the great cartographic milestones in the history of geology. Earlier, MacCulloch was the first government-appointed geologist through his work on the Board of Ordnance whilst carrying out the Millstone, Meridian and Mountain surveys. MacCulloch's work often generated controversy after 1820 when others began to take an interest in Scottish geology. MacCulloch