Scale maps correctly to show features in sufficient detail to enable readers to grasp the desired geographic relationships.
Ensure that readers will understand all features on maps by clearly labeling the maps and their parts.
Simplify maps by eliminating any unnecessary detail.
If necessary, use an inset map of the larger geographical area to establish the geographical perspective of a particular regional map.
Orient north toward the top of the page. Indicate compass direction wherever appropriate.
Use larger lettering to label the principal points of interest on maps.
Combine maps with other visuals to create displays showing geographical distributions.
Use shading, color, and fill patterns to emphasize special features.
Label distances in units of measure that are familiar to the expected readers of the document.
Orient all letters, numbers, and labels horizontally on the page. Use a legend when necessary.
