ProQuest announced that it will be using a proprietary geo-referencing technology to significantly enhance discovery in its Sanborn Map collection, a source for 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 also now the world's largest source of historical GIS-enabled urban maps.
Founded in 1867, the Sanborn Map Company was the primary American publisher of fire insurance maps for nearly 100 years. Popular among researchers because of their detailed descriptions of streets, buildings, and properties in U.S. towns and cities, the maps were digitized by ProQuest to make them more accessible and searchable.
Geo Edition includes a new search interface that enables users to access more than 60,000 geo-referenced maps, covering some of the most populous and historical cities in the United States. Maps can be viewed individually in greater detail with rotation, panning, cropping, and dynamic zoom in/out features. An integrated dynamic overlay map viewer allows maps to be compared and contrasted over time with multiple maps from the same city and against modern day street, satellite, and hybrid views. Geo Edition also connects with other geo-spatial content through GeoTIFF files that can be used to import data into the map files.