"Guide to U.S. Map Resources, Third Edition offers a detailed snapshot of and guide to hundreds of map collections and cartographic resources in libraries and repositories throughout the nation." "Substantial changes have occurred within library map collections in recent years and the computer has been at the core of most of these innovations. Such technologies as geographic information systems (GIS), the World Wide Web, e-mail, Portable Document Format (PDF), data sets, and digitalization have all played revolutionary roles in transforming libraries - and map collections in particular - over the past fifteen years. Today's librarians are no longer limited by the contents of their own map and atlas collections. In many cases, they can turn to the Internet and find a map or data set physically located in a library hundreds or thousands of miles away." "Packed with map library information, such as library holdings, collections, contacts, hours, locations, circulations, and much more, Guide to U.S. Map Resources, Third Edition is the ultimate guide to the varied and still somewhat-hidden cartographic collections and their personnel."--Jacket.