four-part organization replaces the introduction and three major divisions used in the second edition. The four divisions include Introduction, Principles of Cartography, Mapping Techniques, and Geovisualization. • The revised Introduction section now includes an introductory chapter and chapters entitled “A Historical Perspective on Thematic Cartography” and “Statistical and Graphical Foundation.” • A restructured (and renamed) “Historical Perspective” chapter now focuses on the broader history of thematic cartography along with U.S. academic cartography. • The “Data Classification” chapter now precedes the “Principles of Symbolization” chapter, based on user feedback.   • The former “Elements of Cartographic Design” chapter is now divided into two chapters: “Map Elements and Typography” and “Cartographic Design.” The “Cartographic Design” chapter now includes a real-world map design problem (designing a real estate site suitability map) that utilizes the concepts, rules, and guidelines set forth in the “Map Elements and Typography” chapter, as well as the design procedures discussed in the cartographic design chapter. • Extensive changes to the Mapping Techniques section reflect the most recent developments in the field. —Many of the same techniques that were covered in the second edition are discussed. —Because it is now more commonly used, dasymetric mapping is given its own chapter. —“Symbolizing Topography” has been moved from the Mapping Techniques section to the Geovisualization section because of its closer links with geovisualization (and has been renamed “Visualizing Terrain”). —The cluster analysis section has been moved from the “Data Classification” chapter to the “Multivariate Mapping” chapter, in the belief that the technique is more closely tied to multivariate mapping than to data classification. —The second edition’s “Additional Techniques” chapter has been renamed “Cartograms and Flow Maps,” and now focuses solely on these techniques. • A new “Web Mapping” chapter replaces “Electronic Atlases and Multimedia” in the Geovisualization section. Along with material on electronic atlases, this chapter covers a broad range of Web mapping applications and contrasts these applications using five continua: preexisting maps versus custom-tailored maps, low interaction versus high interaction, distributed data versus user-contributed data, updated data versus non-updated data, and animated maps versus static maps. • The most recent results of cartographic research and software development are integrated throughout, with less-relevant material deleted. —The “Scale and Generalization” chapter includes some recent developments occurring at the National Historical Geographic Information System (NHGIS) and a brief section on MapShaper, a free Web-based generalization service. —In the “Principles of Color” chapter, several illustrations that appeared in the second edition have been deleted along with discussion of frame buffers and color display systems. —The “Map Animation” chapter describes several new animation techniques that have been developed (e.g., Harrower and Sheesley’s (2005, 2007) work with fly-bys; Goldsberry’s (2004) stabilized rate of change maps; Peterson and Wendel’s animation of air traffic (http://maps.unomaha.edu/AnimatedFlightAtlas/); and Brownrigg’s (2005) use of 3-D space). This chapter also includes recent research on the effectiveness of animation (e.g.,