This comprehensive text on "Remote Sensing and Geographical Information System" (GIS) presents the fundamentals of the emerging technology of remote sensing combined with GIS. It provides sufficient knowledge of these technologies applied in different fields avoiding voluminous details required at research level. The first part introduces the basics of remote sensing leading up to data analysis. An exhaustive discussion on various types of sensors and their uses has been included to make the readers understand clearly their utilities. The second part presents the highly technical field of Geographic Information System, a tool that now finds applications in almost all fields of engineering, science, geography, planning, and decision-making.