What are all of the pieces of information that make up the total information base of geographic information science and technology? Well, the UCGIS has made a first effort at listing out all of concepts, ideas, and technologies that make up the field of GIS&T. The Body of Knowledge captures the breadth of the field in great detail in a new book published by AAG for UCGIS. It is cheap and very popular.
Even experts in the field won't be experts in all these areas, but all of these areas make up the field. How many do you know?