"Nautical Charts" by G. R. Putnam is a scientific publication written in the early 20th century. The book serves as a comprehensive guide on the origin, construction, and use of nautical charts, highlighting their significance for mariners, passengers, and those involved in maritime trade. It appears to be both informative and accessible, aiming to cater to a wide audience interested in navigation. The opening of "Nautical Charts" introduces the author's motivation behind writing the work, stemming from a lecture prepared for Columbia University. Putnam emphasizes the lack of an all-encompassing discussion on nautical charts despite their prevalence and critical importance in navigation. The initial chapters set the stage for a detailed exploration of various aspects related to chart making, surveying, and the historical development of maps, providing a broad background in geospatial representation and its evolution through time. (This is an automatically generated summary.)