Ground water in some parts of the country, particularly shallow ground water, is changing as result of human activities. The software must be installed onto an IBM-compatible hard disk before the data can be used. All can be displayed, and most can be searched. Not all fields, however, contain data. The CD-ROM is accompanied by a users manual entitled the GNIS Digital Gazetteer.
Prepayment is required.
Visa and Mastercard are accepted. Prices are subject to change.