ProQuest accelerates research with geo-referenced Sanborn Maps

"ProQuest is using a proprietary geo-referencing technology to significantly enhance discovery in its Sanborn Map collection, one of libraries' most consulted sources of historical maps. ProQuest® Sanborn Maps Geo Edition makes map research faster by enabling users to instantly pinpoint historical locations using modern geographic information. The collection is now the world’s largest source of historical GIS-enabled urban maps"