Many books on the subject of field mapping are simply too out of date to be useful. The classic books that can still be purchased second-hand from eBay were written nearly a century ago. Consequently, there is no mention within them of such things as digital cameras, GPS positioning systems, current map types, or any other modern matter. Actually, when you read them, you find that they are not concentrating on the subject of mapping, but more on how to identify minerals and fossils in the field—as, of course, a geologist needs to do. But that means that very few pages in those old books are actually dedicated to the subject of field mapping. This book is different. It is up-to-date, and informal, describing the use of modern equipment and modern techniques. It describes how mapping integrates with the U.K. Ordnance Survey contour maps, so that it can be used by professionals, amateurs, and young people about to start a university geology course involving field mapping for several years and, possibly, an entire career.