Before revision: conic, pseudocylindrical, azimuthal)Slocum, Terry A., Robert B. McMaster, Fritz C. Kessler, Hugh H. Howard, Thematic Cartography and Visualization, 3rd Edition, Pearson-Prentice Hall, 2009, p.201 SPACING These are usually secondary to the primary purpose of the map, so graticules are often drawn to be relatively low in the Visual hierarchy.
After revision: conic, pseudocylindrical, azimuthal)Slocum, Terry A., Robert B. McMaster, Fritz C. Kessler, Hugh H. Howard, Thematic Cartography and Visualization, 3rd Edition, Pearson-Prentice Hall, 2009, p.201 These are usually secondary to the primary purpose of the map, so graticules are often drawn to be relatively low in the Visual hierarchy.