The document provides information about various modern era town planners like Sir Patrick Geddes, Sir Ebenezer Howard, Clarence Stein, Sir Patrick Abercrombie, and Le Corbusier. It discusses their key contributions, including Geddes' concept of regional planning, Howard's garden city movement and three magnet diagram, Stein's neighborhood unit concept, Abercrombie's post-war planning of London and other cities, and Le Corbusier's design of Chandigarh. It also covers principles of neighborhood design and classification and distribution of settlements in India.