Environmental System Research Institute. Home page of ESRI, makers of ArcInfo and ArcView. Includes downloadable software and data files. GIS Data Depot Extensive collection of commercial and non-commercial GIS data. A Galaxy of Maps Sells modern maps, globes, reproductions of old maps.
Web site has photographs of many products.
Historical maps and genealogical information. K.B. Slocum Books and Maps Inexpensive facsimilies of historical maps. Map Link Extensive stock of U.S. and foreign maps. Omni Resources Sells a wide range of paper and digital maps. Satellite Images Online Information on ordering images.