This book is a tutorial that will enable readers to become proficient with the use of image data in projects using geographical information systems (GIS). It begins with an introduction to image display, scanned maps, and remotely sensed imagery. Subsequent chapters focus on transforming pixel coordinates to real-world coordinates, image classification, classification accuracy assessment, and grid operations. The book’s practical, hands-on approach facilitates rapid learning of how to process remotely sensed images, digital orthophotos, digital elevation models, and scanned maps, and how to integrate them with points, lines, and polygon themes. The companion CD-ROM includes files, images, and data sets employed in exercises throughout the book. (Keywords: GIS Applications)